CN1328394C - Compound coate with with powder core and its making process - Google Patents
Compound coate with with powder core and its making process Download PDFInfo
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- CN1328394C CN1328394C CNB2005100858051A CN200510085805A CN1328394C CN 1328394 C CN1328394 C CN 1328394C CN B2005100858051 A CNB2005100858051 A CN B2005100858051A CN 200510085805 A CN200510085805 A CN 200510085805A CN 1328394 C CN1328394 C CN 1328394C
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- 239000000843 powder Substances 0.000 title claims abstract description 291
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title abstract description 13
- 150000001875 compounds Chemical class 0.000 title description 29
- 238000006873 Coates reaction Methods 0.000 title description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 82
- 239000010959 steel Substances 0.000 claims abstract description 82
- 229910052751 metal Inorganic materials 0.000 claims abstract description 38
- 239000002184 metal Substances 0.000 claims abstract description 38
- 239000002131 composite material Substances 0.000 claims abstract description 34
- 239000004744 fabric Substances 0.000 claims abstract description 31
- 238000009834 vaporization Methods 0.000 claims abstract description 14
- 230000008016 vaporization Effects 0.000 claims abstract description 14
- 238000004519 manufacturing process Methods 0.000 claims abstract description 10
- 238000009826 distribution Methods 0.000 claims abstract 12
- 239000011777 magnesium Substances 0.000 claims description 99
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical group [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 98
- 229910052749 magnesium Inorganic materials 0.000 claims description 80
- 229910045601 alloy Inorganic materials 0.000 claims description 22
- 239000000956 alloy Substances 0.000 claims description 22
- 229910052782 aluminium Inorganic materials 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 19
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000005253 cladding Methods 0.000 claims 1
- 238000005056 compaction Methods 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 105
- 229910052742 iron Inorganic materials 0.000 abstract description 46
- 238000012545 processing Methods 0.000 abstract description 23
- 239000000126 substance Substances 0.000 abstract description 12
- 239000011575 calcium Substances 0.000 description 84
- 229910052791 calcium Inorganic materials 0.000 description 77
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 56
- 238000001704 evaporation Methods 0.000 description 27
- OSMSIOKMMFKNIL-UHFFFAOYSA-N calcium;silicon Chemical compound [Ca]=[Si] OSMSIOKMMFKNIL-UHFFFAOYSA-N 0.000 description 25
- WNQQFQRHFNVNSP-UHFFFAOYSA-N [Ca].[Fe] Chemical compound [Ca].[Fe] WNQQFQRHFNVNSP-UHFFFAOYSA-N 0.000 description 20
- 229910052788 barium Inorganic materials 0.000 description 16
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 16
- 235000013339 cereals Nutrition 0.000 description 16
- 239000003795 chemical substances by application Substances 0.000 description 16
- 239000000203 mixture Substances 0.000 description 14
- 239000004411 aluminium Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 10
- NCJRLCWABWKAGX-UHFFFAOYSA-N [Si].[Ca].[Ba] Chemical group [Si].[Ca].[Ba] NCJRLCWABWKAGX-UHFFFAOYSA-N 0.000 description 9
- 238000006477 desulfuration reaction Methods 0.000 description 9
- 230000023556 desulfurization Effects 0.000 description 9
- 238000011081 inoculation Methods 0.000 description 8
- 229910000600 Ba alloy Inorganic materials 0.000 description 7
- 229910000861 Mg alloy Inorganic materials 0.000 description 7
- 239000008187 granular material Substances 0.000 description 7
- 229910000519 Ferrosilicon Inorganic materials 0.000 description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 229910052760 oxygen Inorganic materials 0.000 description 5
- 239000001301 oxygen Substances 0.000 description 5
- 239000005864 Sulphur Substances 0.000 description 4
- LAZOHFXCELVBBV-UHFFFAOYSA-N [Mg].[Ca].[Si] Chemical compound [Mg].[Ca].[Si] LAZOHFXCELVBBV-UHFFFAOYSA-N 0.000 description 4
- -1 calcium iron aluminum Chemical compound 0.000 description 4
- 239000002667 nucleating agent Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 239000004567 concrete Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- 150000002910 rare earth metals Chemical class 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000882 Ca alloy Inorganic materials 0.000 description 1
- MBMLMWLHJBBADN-UHFFFAOYSA-N Ferrous sulfide Chemical compound [Fe]=S MBMLMWLHJBBADN-UHFFFAOYSA-N 0.000 description 1
- 229910001374 Invar Inorganic materials 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910007981 Si-Mg Inorganic materials 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910008316 Si—Mg Inorganic materials 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- SCKYCOWCCWWTLE-UHFFFAOYSA-N [Mg].[Ca].[Ba].[Si] Chemical compound [Mg].[Ca].[Ba].[Si] SCKYCOWCCWWTLE-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- OOJQNBIDYDPHHE-UHFFFAOYSA-N barium silicon Chemical compound [Si].[Ba] OOJQNBIDYDPHHE-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009395 breeding Methods 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 235000003599 food sweetener Nutrition 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000003765 sweetening agent Substances 0.000 description 1
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- Treatment Of Steel In Its Molten State (AREA)
Abstract
本发明涉及一种用于钢水或铁水处理的复合粉芯包芯线及其制造方法。复合粉芯包芯线是由钢带和包裹在钢带中的粉料构成的，其特征是：将包芯线中应添加的粉料按各功能元素的作用，分两部分进行配制，在其中一部分粉料中含有汽化点低于其欲处理的金属液温度的功能元素，称为内部粉料；在另一部分粉料中所含的功能元素的汽化点均大于等于其欲处理的金属液温度，称为外层粉料；内部粉料包裹在外层粉料中，使得外层粉料对内部粉料形成包裹层。其制造方法是在包芯线机上通过两种粉料的分层三级布料来实现外层粉料对内部粉料的包裹的，并基本保证内部粉料在外层粉料所裹层中其截面形状呈类圆形分布。其优点是：既能降低低汽化点物质在穿过钢水或铁水或过程中的汽化量、又能降低低汽化点物质在包底与钢水或铁水进行反应时的汽化量，从而提高低汽化点物质在钢水或铁水中的利用率。
The invention relates to a composite powder-core cored wire for processing molten steel or molten iron and a manufacturing method thereof. Composite powder core cored wire is composed of steel strip and powder wrapped in the steel strip, and its characteristic is: the powder that should be added to the cored wire is prepared in two parts according to the function of each functional element. Part of the powder contains functional elements whose vaporization point is lower than the temperature of the molten metal to be treated, which is called internal powder; the other part of the powder contains functional elements whose vaporization point is greater than or equal to the molten metal to be processed The temperature is called the outer layer of powder; the inner powder is wrapped in the outer layer of powder, so that the outer layer of powder forms a wrapping layer on the inner powder. Its manufacturing method is to realize the wrapping of the inner powder by the layered three-level cloth of two kinds of powder on the cored wire machine, and basically ensure that the cross-section of the inner powder is in the layer wrapped by the outer powder. The shape is like a circular distribution. Its advantages are: it can not only reduce the vaporization amount of low vaporization point substances passing through molten steel or molten iron or process, but also reduce the vaporization amount of low vaporization point substances when reacting with molten steel or molten iron at the bottom of the ladle, thereby increasing the low vaporization point The utilization rate of a substance in molten steel or molten iron.
Description
Technical field
The present invention relates to a kind of compound coate with powder core and manufacture method thereof that is used for molten steel or molten iron processing.
Background technology
At present, known cored-wire all is to be made of steel band and the powder that is wrapped in the steel band, see Fig. 1, react with molten iron or molten steel at the bottom of with feeding wire machine then, improve the feeding utilization ratio of element in molten iron or molten steel or the purpose of specific absorption to reach with its feeding pack processing bag.
When containing evaporating point in the powder of cored-wire of feeding and be lower than the material of molten metal temperature of its processing (hereinafter to be referred as low evaporating point material), as: the cored-wire that contains magnesium powder or magnesium alloy powder in molten iron in the feeding powder carries out the desulfurization and the spheroidizing of molten iron, in molten steel, contain calcium metal in the feeding powder, during the cored-wire of silico-calcium or magnesium, owing to contain the element that evaporating point is lower than the molten metal temperature of processing in the material of feeding, therefore, passing molten metal at cored-wire arrives in the bag process at the end, the outer field low evaporating point material cored-wire mesectoderm or near will be subjected to the strong preheating of high temperature fluent metal, moment will reach its evaporating point, form steam, improved the concentration class of low evaporating point material in the reaction of the bag end, thereby form bigger vapour pressure, reduced the utilization ratio of low evaporating point material in molten steel or molten iron.
Concrete case is as follows:
1) the adding ferro-calcium core-spun yarn carries out the desulfurization of molten steel and goes bad when handling in molten steel, because the vaporization temperature of calcium metal is 1480 ℃, and the temperature of processing molten steel is at 1570～1650 ℃, the core agent of calcium iron wire is formed by granules of metal Ca and the iron powder system of mixing, the content of general calcium is 25～40%, calcium metal is in the process at the bottom of the cored-wire feeding ladle bag, its mesectoderm or nearly outer field calcium can reach vaporization temperature, produce calcium steam, thereby aggravation calcium steam is at the bag aggregation extent at the end, produce bigger vapour pressure, reduced the utilization ratio of calcium in molten iron.Generally speaking, the utilization ratio of calcium iron wire in molten steel of calcic 30% is about about 7～10%.
When 2) in molten steel, adding silico-calcium cored-wire or silicon barium calcium core-spun yarn, though when calcium exists with alloy state, improved the fusing point of calcium, but can not change the evaporating point of calcium, therefore, when in molten steel, feeding silicon-calcium wire or silicon barium calcium line, also exist the early stage vaporization phenomenon of calcium when being similar to feeding calcium iron wire.When the silico-calcium cored-wire that adopts calcic 30% carried out the molten steel processing, the utilization ratio of calcium in molten steel was generally 12～20%; When the silicon barium calcium core-spun yarn that adopts calcic 13～15%, baric 13～15% carried out the molten steel processing, the utilization ratio of calcium in molten steel was 2 times of calcic 30% silicon-calcium wire.
3) for above-mentioned reasons, the cored-wire or the Si-Mg alloy powder that adopt present purifying magnesium powder and alloy powder or metal powder material to mix the coremaking agent are the cored-wire of core agent, in steel during line feeding, reaction is extremely fierce, magnesium efficient extremely low, be very restricted in actual applications, this just is provided with obstacle to the industrial applications that adds magnesium process for producing Clean Steel or high-purity steel grade in the steel.
4) in molten iron, add when containing the magnesium cored-wire and carrying out the desulfurization of molten iron and spheroidizing, because the evaporating point of MAGNESIUM METAL only is 1080 ℃, and the temperature of handling molten iron is generally 1400～1550 ℃, when adopting deactivating magnesium powder and the agent of silicon-base alloy powder blended core, when magnesium content is 30%, when handling 1460 ℃ in 1000kg/ iron clad water, treatment solution temperature, the utilization ratio of magnesium in molten iron only is about 30%; When employing contained the silicon-base alloy powder of magnesium 30%, the utilization ratio of magnesium in molten iron was 35～45%.
In the desulfurization and spheroidizing process of molten iron, adopt the method that the pours nodulizing agent contain magnesium 4% to carry out molten iron when handling, the utilization ratio of magnesium in molten iron can reach more than 60%, and magnesium efficient in molten iron surpasses 55% in the coating magnesium core spun yarn; In above-mentioned case, the utilization ratio of calcium in molten steel in calcium iron wire, silicon-calcium wire and the silico-calcium barium line is distinct, relevant with the lowest about 20 percentage points of soprano, therefore, no matter be to contain the magnesium cored-wire, still contain calcium core-spun yarn, as long as solved the vaporization problem of insertion process, the utilization ratio of its functional element space that still is greatly improved.
The evaporating point of barium is 1640 ℃, the solubleness of barium in molten steel is extremely low, but the adding of barium improves calcium and the magnesium solubleness in molten steel, thereby calcium and the utilization ratio of magnesium in molten steel have been improved, make the desoxydatoin of calcium and make the effect of inclusion modification obtain performance, impel the total oxygen content in the molten steel comparatively fast to reach balance; On the other hand, barium participates in deoxygenation at the refining initial stage, and its resultant BaO and the collision of other product and bonded probability are very big, can float from molten steel rapidly, get rid of, thereby steel inclusion quantity is reduced, and has correspondingly reduced the whole oxygen amount in the molten steel.
Magnesium has the ability of very strong desulfurization, deoxidation and change inclusion morphology, presses nucleidic mass and calculates, and its desulfurization, deoxidizing capacity are 1.67 times of calcium, and its price is 36% of a calcium metal, be in the silicocalcium calcium 55%.When magnesium is used for sweetening agent, its shortcoming be the evaporating point of magnesium far below handling molten iron or handle the temperature of molten steel, recovery rate is too low and fail to realize its superiority.
The magnesium that adds in the steel is handled, and can further reduce the quantity of oxide inclusion, reduces size, and has improved the anisotropy of inclusion in the operation of rolling.
At present, the research direction of producing in Clean Steel and the High Purity Steel is and adds the magnesium processing in the world, the Clean Steel that adopts pure magnesium to handle, and the oxide inclusion quantity in the steel reduces, but the size of what is more important oxide inclusion only is 3～4um, and be spherical, in steel, be disperse and distribute that sulfide inclusion becomes duplex impurity, size obviously reduces, the isotropy of rolling back steel is good, but adds the not solution of method problem of magnesium in the invar, and can't implement.
200510053233.9) and contain magnesium core cored-wire (application number: 200520007239.8) magnesium core spun yarn of Baotou Yixin Metallurgical Technology Co., Ltd. (application number:; all adopt by in the process of cored-wire feeding molten iron, low evaporating point material being carried out the principle of thermal insulation protection; with stop or reduce low evaporating point material in passing the molten iron process because the process vaporization phenomenon that the strong preheating of molten iron produces, thereby the utilization ratio of raising magnesium in molten iron.Magnesium amount by the reaction of control unit time participation molten iron has realized being similar to the higher magnesium utilization efficiency that pours nodulizing agent under the method condition.
Summary of the invention
The objective of the invention is in order to have overcome the deficiencies in the prior art, by to the structural optimization of cored-wire, provide a kind of and can reduce the evaporating capacity of low evaporating point material in passing molten steel or molten iron or process, the evaporating capacity in the time of reducing low evaporating point material and react with molten steel or molten iron again, thereby improve the compound coate with powder core and the manufacture method thereof of hanging down the utilization ratio of evaporating point material in molten steel or molten iron at the bag end.
The objective of the invention is to realize by following mode:
Compound coate with powder core of the present invention is to be made of steel band and the powder that is wrapped in the steel band, it is characterized in that: with the powder that should add in the cored-wire effect by each functional element, divide two portions to prepare, contain the functional element that evaporating point is lower than the molten metal temperature of its desire processing in a part of therein powder, be called inner powder; The molten metal temperature that the evaporating point of contained functional element is all handled more than or equal to its desire in another part powder is called outer powder; Inner powder is wrapped in the outer powder, makes outer powder form integument to inner powder.
The typical structure that compound coate with powder core of the present invention is distinguished according to purposes is as follows:
1) composite core calcium iron wire: its inner powder is that the mixture by calcium grain or calcium grain and iron powder constitutes, and its outer powder is that the mixture by iron powder or iron powder and aluminium powder constitutes;
2) composite core silico-calcium barium line: its inner powder is made of the silicocalcium powder, and its outer powder is made of the Si-Ba alloy powder;
3) contain magnesium nodularization, covering line: its inner powder is that the mixture by high magnesium silicon-base alloy powder or magnesium powder and silicon-base alloy powder constitutes, and its outer powder is made of the nucleating agent powder, as the mixture of ferrosilicon powder, rare earth ferrosilicon alloy powder and Si-Ba alloy powder.
For being used for the cored-wire that molten steel is handled, be not magniferous in the prior art in its powder, its reason as previously mentioned, though magnesium has the ability of very strong desulfurization, deoxidation and change inclusion morphology, pressing nucleidic mass calculates, its desulfurization, deoxidizing capacity are 1.67 times of calcium, and its price is 36% of a calcium metal, be in the silicocalcium calcium 55%.But its shortcoming be the evaporating point of magnesium far below the temperature of handling molten steel, recovery rate is too low, reaction is too fierce and can not realize its superiority, so can't be added in the powder.And the structure that adopts compound coate with powder core of the present invention just can be implemented in and adds magnesium in the inner powder and partly replace calcium in the powder with the manufacturing cost that reduces cored-wire and the processing cost when using, and improves the utilization ratio of cored-wire.The form that adds magnesium in inner powder has three kinds, and a kind of is that pure magnesium powder particles is sneaked in the inner powder in proportion; Second kind is that the high magnesium silicon-base alloy powder that contains magnesium 20～50% is sneaked in the inner powder in proportion; The third is with the magnesium line or scribbles the magnesium line of heat insulation coating or the central zone that magniferous alloy wire places inner powder.
Above-mentioned be used for that molten steel handles to contain the typical structure that the magnesium cored-wire distinguishes according to purposes as follows:
1) Ca, Mg and Fe line: its inner powder is that the mixture by calcium grain or calcium grain and iron powder constitutes, and its outer powder layer is that the mixture by iron powder or iron powder and aluminium powder constitutes, and adds magnesium with one of above-mentioned three kinds of forms in inner powder;
2) Si-Ca-Ba-Mg line: its inner powder is made of the silicocalcium powder, and its outer powder is made of the Si-Ba alloy powder, and adds magnesium with one of above-mentioned three kinds of forms in inner powder;
When needing to add aluminium in the powder at cored-wire, can adopt aluminum steel to add as required at inner powder center, also can adopt aluminium powder or sial iron powder to add in the layer powder outside.
When the line of the ratio of the powder in the compound coate with powder core of the present invention and the metal wire that is added footpath should be satisfied molten steel or molten iron and handled to the requirement of core agent composition and ratio.(annotate: the composition of cored-wire powder, proportioning are the industry public technology, can prepare with reference to given composition and the add-on of casting handbook).
Compound coate with powder core product of the present invention is by the cored-wire machine parcel of powder to be realized, its concrete manufacture method is as follows:
Three grades of clothes of layering by two kinds of powders on the cored-wire machine are realized the parcel of outer powder to inner powder, and guarantee that substantially inner powder wraps up in the layer its cross-sectional shape at outer powder and be similar round and distribute.
The cloth of two of the compound coate with powder core of containing metal line kinds of powders is not realized by three grades of clothes, and the one-level cloth is to press the cloth bucket of arc to carry out the cloth of outer powder by a band, and the section form behind the cloth is seen Fig. 4; The secondary cloth is that cloth is realized by three cloth buckets that gather side by side the time, the intermediary cloth bucket carries out the cloth of inner powder, two cloth buckets of both sides carry out the cloth of outer powder, the position of intermediary cloth bucket is higher than the position of two cloth buckets of both sides, to realize that inner powder layer is higher than the purpose of outer powder layer, the shape behind the cloth is seen Fig. 5; Three grades of clothes carry out cloth by a cloth bucket, and this cloth bucket is the cloth that carries out outer powder, and the shape behind the cloth is seen Fig. 6; Behind three grades of clothes, reach the shape with existing cored-wire one-level cloth, carry out normal inclusion, seaming, consolidation, shaping after, promptly become compound coate with powder core.
Manufacture method for the compound coate with powder core of containing metal line is behind the one-level cloth, imports metal wire, carries out then realizing behind secondary and the three grades of clothes.
Positively effect of the present invention:
1) compound coate with powder core has reduced the evaporating capacity that low evaporating point material reacts in molten steel or molten iron, improved the utilization ratio of low evaporating point material in molten steel or molten iron, reduce the surging degree of reaction, improved the utilization ratio of low evaporating point material, be beneficial to the reduction processing cost;
2) be used for the cored-wire that molten steel is handled,, therefore, can keeping adding magnesium under the former response behaviour condition, thereby improve the final sulfur content of desulfurization degree and molten steel owing to reduced the quantity of steam of calcium when containing the calcium core-spun yarn processing at present;
3) be used for the molten iron nodularization and the inoculation magnesium core spun yarn is compared, can adjust the magnesium content of powder core, disperse the magnesium steam bubble, compare with containing magnesium core cored-wire, can reduce the time processing process;
4) compare with molten iron nodularization and inoculation magnesium powder mixed core agent cored-wire, efficient increase substantially of magnesium in molten iron, improvement value reaches more than 20 percentage points;
5) compare with covering line with the high magnesium alloy nodularization cored-wire that is used for molten iron and inoculation, realized the powder of two kinds of cored-wires is wrapped up with a steel band, the steel band ratio can reduce more than 30%, thereby reduces the negative impact of steel band cost to processing cost.
Description of drawings
Fig. 1 is the structural representation of existing cored-wire;
Fig. 2 is the structural representation of compound coate with powder core of the present invention;
Fig. 3 is the compound coate with powder core structural representation of containing metal line of the present invention;
After Fig. 4 is the one-level cloth, cored-wire section form synoptic diagram;
After Fig. 5 is the secondary cloth, cored-wire section form synoptic diagram;
After Fig. 6 is three grades of clothes, cored-wire section form synoptic diagram.
Embodiment
With reference to accompanying drawing, compound coate with powder core of the present invention is to be made of steel band 1 and the powder 2 that is wrapped in the steel band 1, with the powder that should add in the cored-wire effect by each functional element, divide two portions to prepare, contain the functional element that evaporating point is lower than the molten metal temperature of its desire processing in a part of therein powder, be called inner powder 4; The molten metal temperature that the evaporating point of contained functional element is all handled more than or equal to its desire in another part powder is called outer powder 3; Inner powder 4 is wrapped in the outer powder 3, makes 3 pairs of inner powders 4 of outer powder form integument, and the thickness of formed integument is not less than 1.2mm.According to the needs of process object, can in the inside of compound coate with powder core powder 4, add metal wire 5, MAGNESIUM METAL line 5 is at least one, and metal wire 5 generally is magnesium line or aluminum steel.For being used for the compound coate with powder core that molten steel is handled, can in inner powder 4, add magnesium and partly replace calcium in the powder with the manufacturing cost that reduces cored-wire and the processing cost when using, improve the utilization ratio of cored-wire.The form that adds magnesium in inner powder 4 has three kinds, and a kind of is that pure magnesium powder particles is sneaked in the inner powder in proportion; Second kind is that the high magnesium silicon-base alloy powder that contains magnesium 20～50% is sneaked in the inner powder in proportion; The third is the central zone that MAGNESIUM METAL line 5 or the MAGNESIUM METAL line 5 that scribbles heat insulation coating is placed inner powder 4.When needing to add aluminium in the powder at cored-wire, can adopt aluminum steel 5 to add as required at inner powder 4 centers, also can adopt aluminium powder or sial iron powder to add in the layer powder 3 outside.
When the line of the ratio of the powder in the compound coate with powder core of the present invention and the metal wire 5 that is added footpath should be satisfied molten steel or molten iron and handled to the requirement of core agent composition and ratio.
With application example the present invention is compared explanation below:
One, silicon calcium powder core comprehensive silicon calcium line
Existing silicon-calcium wire is to be that pulvis wraps up with steel band by the silicocalcium powder of calcic more than 30%.
The inside powder of composite core silicon-calcium wire adopts the silicocalcium powder more than 30%, and outer powder adopts ferrosilicon or other alloy powder that molten steel is not impacted, and also can adopt slag making materials.Compound coate with powder core with Φ 13 and Φ 16 is that example describes below.
When the cored-wire linear diameter was selected 16mm, outer powder was selected ferrosilicon powder, and its thickness is 1.5～2mm, and the internal diameter of silico-calcium powder is about 11mm, and selected thickness of strips is 0.4～0.42mm, and the granularity of powder is: outer powder≤2mm, internal layer powder≤2.5mm.
When the cored-wire diameter is selected 13mm, the inner powder of composite core silicon-calcium wire adopts the silicocalcium powder more than 30%, and outer powder adopts the silicocalcium powder of calcic 10%, the thickness of outer powder layer is 2mm, the internal diameter of silico-calcium powder is about 9mm, selected thickness of strips is 0.4～0.42mm, and the granularity of powder is: outer powder≤1.5mm, internal layer powder≤2.0mm.
The parameter of compound coate with powder core unit length is:
| The cored-wire kind | Cored-wire diameter mm | Steel band weight g/m | Outer grain weight amount g/m | Silicon calcium powder weight g/m | Every meter calcium content g/m | Heart yearn substance g/m |
| The silicon calcium powder core spun yarn | 16 | 205 | 180 | 170 | 51 | 555 |
| The silicon calcium powder core spun yarn | 13 | 175 | 130 | 120 | 49 | 425 |
| The ordinary silicon calcium line | 13 | 175 | 0 | 225 | 67.5 | 400 |
Compare with the ordinary silicon calcium line of Φ 13mm, during identical with it or 90% left and right sides of its add-on of the add-on of the powder core silicon-calcium wire of Φ 13mm, on the final-sulphur content and whole oxygen amount of inclusion morphology and molten steel, can reach same effect.The powder core silicon-calcium wire of Φ 16mm when add-on be the ordinary silicon calcium line 60～80% the time, can reach same effect.From cost relatively, the cost of the two can reduce by 10～20%.
Two, the compound silico-calcium barium of silicon calcium powder core line
Existing silico-calcium barium line is to adopt calcic greater than 13%, and baric packs for the core agent greater than 15% Si-Ba-Ca alloy powder.
The inside powder of composite core silico-calcium barium line adopts the silicocalcium powder more than 30%, and outer powder is to adopt the Si-Ba alloy powder to constitute.
When the cored-wire linear diameter was selected 16mm, outer powder selected barium content greater than 26% Si-Ba alloy powder, and the thickness of powder layer is 1.5～2mm, the internal diameter of silico-calcium powder is about 11mm, selected thickness of strips is 0.4～0.42mm, and the granularity of powder is: outer powder≤2mm, inner powder≤2.5mm.
When the cored-wire linear diameter was selected 13mm, outer powder was selected to be made of the Si-Ba alloy powder that contains 26%, and the thickness of powder layer is 1.5～2mm, the internal diameter of silico-calcium powder is about 9mm, selected thickness of strips is 0.4～0.42mm, and the granularity of powder is: outer powder≤1.5mm, inner powder≤2.0mm.
The parameter of this compound coate with powder core unit length is:
| The cored-wire kind | Cored-wire diameter mm | Steel band weight g/m | Outer grain weight amount g/m | Silicon calcium powder weight g/m | Every meter calcium content g/m | Every meter barium content g/m | Heart yearn substance g/m |
| Silicon calcium powder core silicon barium calcium line | 16 | 205 | 180 | 170 | 51 | 46.8 | 555 |
| Silicon calcium powder core silicon barium calcium line | 13 | 175 | 130 | 120 | 36 | 34 | 425 |
| Ordinary silicon barium calcium line | 13 | 175 | 0 | 225 | 30 | 33.8 | 400 |
Compare with Φ 13mm ordinary silicon barium calcium, when the add-on of Φ 13mm silicon calcium powder core silicon barium calcium line is its 75～90% left and right sides, the add-on of Φ 16mm silicon calcium powder core silicon barium calcium line can reach same treatment effect when being its 50～80% left and right sides, and processing cost can reduce by 10～30%.
Three, the compound Si-Ca-Ba-Mg line of silicon calcium-magnesium powder core
Existing Si-Ca-Ba-Mg line adopts the Si-Ca-Ba-Mg alloy to pack, and the typical composition of its core agent is: calcium: barium 12%: magnesium 13%: silicon 8%: 48%.
The inside powder of composite core silico-calcium barium line adopts the silicocalcium powder 30% or more and contains the high magnesium silicon-base alloy powder of magnesium 20～30% or deactivating magnesium powder mixes, and outer powder employing barium content is greater than 26% Si-Ba alloy powder.
When the cored-wire linear diameter was selected 16mm, outer powder layer ground thickness was 1.5～2mm, and the internal diameter of silico-calcium powder is about 11mm, and selected thickness of strips is 0.4～0.42mm, and the granularity of powder is: outer powder≤2mm, inner powder≤2.5mm.
When the cored-wire linear diameter was selected 13mm, outer powder layer ground thickness was 1.5～2mm, and the internal diameter of silico-calcium powder is about 9mm, and selected thickness of strips is 0.4～0.42mm, and the granularity of powder is: outer powder≤1.5mm, inner powder≤2.0mm.
The parameter of this compound coate with powder core unit length is:
| The cored-wire kind | Cored-wire diameter mm | Steel band weight g/m | Outer grain weight amount g/m | Silicon calcium-magnesium powder core weight g/m | Every meter calcium content g/m | Every meter barium content g/m | Every meter magnesium content g/m | Heart yearn substance g/m |
| Silicon calcium-magnesium powder core Si-Ca-Ba-Mg line | 16 | 205 | 180 | 170 | 31 | 23 | 20 | 555 |
| Silico-calciummagnesium alloy powder core Si-Ca-Ba-Mg line | 13 | 175 | 130 | 120 | 21.6 | 34 | 15.6 | 420 |
| The pure magnesium powder of silico-calcium core Si-Ca-Ba-Mg line | 13 | 175 | 130 | 120 | 33 | 30 | 20 | 420 |
| Common Si-Ca-Ba-Mg line | 13 | 175 | 0 | 225 | 30 | 33.8 | 18 | 400 |
Compare with the common silicon-barium-calcium-magnesium of Φ 13mm, the add-on of Φ 13mm silico-calciummagnesium alloy powder core Si-Ca-Ba-Mg line is its 80～95% o'clock, the add-on of the pure magnesium powder of Φ 13mm silico-calcium core Si-Ca-Ba-Mg line is its 85～90% o'clock, the add-on of Φ 16mm silico-calciummagnesium alloy powder core Si-Ca-Ba-Mg line is its 60～85% o'clock, can reach same treatment effect, and The amount of inclusions reduces, and the inclusion size reduces, and processing cost can reduce by 10～20%.
Four, the composite core Si-Ca-Ba-Mg line that contains the magnesium line
Compare with embodiment three, magnesium wherein is to add with the form of magnesium line.
The parameter that contains the composite core Si-Ca-Ba-Mg line unit length of magnesium line is:
| The cored-wire kind | Cored-wire diameter mm | Magnesium linear diameter mm | Steel band weight g/m | Outer grain weight amount g/m | Silicon calcium powder core weight g/m | Every meter calcium content g/m | Every meter barium content g/m | Every meter magnesium content g/m | Heart yearn substance g/m |
| Silicon calcium-magnesium powder core Si-Ca-Ba-Mg line | 16 | 9 | 205 | 180 | 170 | 31 | 23 | 20 | 555 |
| Silico-calciummagnesium alloy powder core Si-Ca-Ba-Mg line | 13 | 8 | 175 | 130 | 120 | 26 | 34 | 16 | 420 |
| The pure magnesium powder of silico-calcium core Si-Ca-Ba-Mg line | 13 | 9 | 175 | 130 | 120 | 33 | 30 | 20 | 420 |
| Common Si-Ca-Ba-Mg line | 13 | 0 | 175 | 0 | 225 | 30 | 33.8 | 18 | 400 |
Contain that pairing kind conforms to substantially among add-on and the embodiment four of composite core Si-Ca-Ba-Mg line of magnesium line, just with the comparing of magnesium alloy powder, magnesium descends 10～20% on efficient.
Five, the compound calcium iron wire of metallic calcium powder core
Existing calcium iron wire by granules of metal Ca with after iron powder mixes for the core agent packs, the calcium contents in the core agent is generally 30～40%.
The inside powder of composite core calcium iron wire is the mixture that adopts granules of metal Ca or granules of metal Ca and iron powder, and outer powder then adopts iron powder.
When the cored-wire linear diameter is selected 16mm; the thickness of outer powder layer is 1.5～2mm, and the internal diameter of calcium grain or calcium grain and iron powder blended powder is about 11mm, and selected thickness of strips is 0.4～0.42mm; the granularity of powder is: outer powder≤2mm, inner powder≤3mm.
When the cored-wire diameter is selected 13mm; the thickness of outer powder layer is 1.5～2mm, and the internal diameter of calcium grain or calcium grain and iron powder blended powder is about 9～10mm, and selected thickness of strips is 0.4～0.42mm; the granularity of powder is: outer powder≤1.5mm, inner powder≤2.0mm.
The parameter of the compound calcium iron wire of metallic calcium powder core unit length is:
| The cored-wire kind | Cored-wire diameter mm | Steel band weight g/m | Outer grain weight amount g/m | Calcium iron powder weight g/m | Every meter calcium content g/m | Heart yearn substance g/m |
| Composite core calcium iron wire | 16 | 205 | 200 | 150 | 100 | 555 |
| Composite core calcium iron wire | 13 | 175 | 150 | 100 | 75 | 425 |
| Common calcium iron wire | 13 | 175 | 0 | 250 | 75 | 400 |
Compare with the ordinary silicon calcium line of Φ 13mm, the add-on of the powder core calcium iron wire of Φ 13mm and Φ 16mm is 80% o'clock of its add-on, on the final-sulphur content and whole oxygen amount of inclusion morphology and molten steel, can reach same effect.From cost relatively, the processing cost of the two can reduce by 10～25%.
Six, the compound calcium ferro-aluminum of metallic calcium powder core line
For the core agent packs, the calcium contents in the core agent is generally 30～40% to existing calcium iron aluminum steel by granules of metal Ca, aluminium powder and after iron powder mixes, and aluminum content is generally 5～10%.
The inside powder of composite core calcium iron wire is the mixture that adopts granules of metal Ca and aluminium powder or granules of metal Ca and aluminium powder and iron powder, and outer powder then adopts iron powder.Also aluminium powder can be mixed as outer powder with iron powder.
When the cored-wire linear diameter was selected 16mm, the thickness of outer powder layer was 2mm, and the internal diameter of powder core is about 11mm, and selected thickness of strips is 0.4～0.42mm, and the granularity of powder is: outer powder≤2mm, inner powder≤3mm.
Select 13mm when the cored-wire diameter, the thickness of outer powder layer is 1.5～2mm, and the internal diameter of powder core is about 9～10mm, and selected thickness of strips is 0.4～0.42mm, and the granularity of powder is: outer powder≤1.5mm, inner powder≤2.0mm.
The parameter of the compound calcium ferro-aluminum of metallic calcium powder core line unit length is:
| The cored-wire kind | Cored-wire diameter mm | Steel band weight g/m | Outer grain weight amount g/m | Calcium iron powder weight g/m | Every meter calcium content g/m | Every meter aluminum content g/m | Heart yearn substance g/m |
| Composite core calcium ferro-aluminum line | 16 | 205 | 200 | 150 | 100 | 17.5 | 555 |
| Composite core calcium ferro-aluminum line | 13 | 175 | 150 | 100 | 75 | 17.5 | 425 |
| Common calcium ferro-aluminum line | 13 | 175 | 0 | 250 | 75 | 17.5 | 400 |
Compare with the ordinary silicon calcium line of Φ 13mm, the add-on of the powder core calcium iron wire of Φ 13mm and Φ 16mm is 80% o'clock of its add-on, on the final-sulphur content and whole oxygen amount of inclusion morphology and molten steel, can reach same effect.From cost relatively, the processing cost of the two can reduce by 10～25%.
Seven, the composite core Ca, Mg and Fe line that contains the magnesium line
Promptly add a magnesium line in the composite core Ca, Mg and Fe line in embodiment six, the diameter of magnesium line depends on that the weight of magnesium line is 5～8% of core agent weight.
The parameter that contains the composite core Si-Ca-Ba-Mg line unit length of magnesium line is:
| The cored-wire kind | Cored-wire diameter mm | Magnesium linear diameter mm | Steel band weight g/m | Outer grain weight amount g/m | Powder core weight g/m | Every meter calcium content g/m | Every meter magnesium content g/m | Heart yearn substance g/m |
| The composite core Ca, Mg and Fe line that contains the magnesium line | 16 | 9 | 205 | 180 | 130 | 100 | 20 | 555 |
| The composite core Ca, Mg and Fe line that contains the magnesium line | 13 | 8 | 175 | 130 | 100 | 50 | 20 | 420 |
| Common calcium iron wire | 13 | 0 | 175 | 0 | 250 | 75 | 0 | 425 |
Contain among add-on and the embodiment seven of composite core Si-Ca-Ba-Mg line of magnesium line pairing kind and compare substantially, add-on reduces by 10～20%, compares with the calcium iron wire, add-on reduces about 30%, processing cost is compared with the calcium iron wire, can reduce by 20%, and final sulfur content reduces.
Eight, contain magnesium powder core compound spheroidizing covering line
The outer powder that contains magnesium powder core compound spheroidizing covering line is made up of the nucleating agent powder, and the nucleating agent powder is to be selected by the composition requirement of inoculation by ferrosilicon powder, silicon barium powder, rare earth alloy powder etc.The ratio of nodularization powder core and nucleating agent layer depends on needed dosage and the nodularization dosage of breeding.Magnesium in the nodularization powder core have two kinds of forms, a kind ofly exist with simple substance magnesium, promptly carry out blended with magnesium powder and silicon-base alloy powder; Another kind is that the alloy attitude exists, and promptly carries out blended with high magnesium alloy powder and silicon-base alloy powder, and when adding pitch, the ratio of asphalt powder accounts for 7～15% of outer powder weight.
The parameter that contains magnesium powder core compound spheroidizing covering line unit length is:
| The cored-wire kind | Cored-wire diameter mm | Steel band weight g/m | Outer powder thickness mm | Outer grain weight amount g/m | Powder core weight g/m | Every meter magnesium content g/m | Heart yearn substance g/m |
| The composite core spheroidization and inoculation line of magnesium powder core | 13 | 175 | 2 | 130 | 125 | 39 | 430 |
| 12 | 160 | 2 | 120 | 80 | 32 | 360 | |
| 11 | 150 | 1.5 | 100 | 75 | 30 | 325 | |
| The composite core spheroidization and inoculation line of magnesium alloy powder core | 16 | 210 | 2.5 | 200 | 140 | 42 | 550 |
| 15 | 200 | 2 | 150 | 140 | 42 | 490 | |
| 14 | 180 | 2 | 130 | 130 | 39 | 440 |
Add-on and the result of above-mentioned cored-wire when handling 1 ton/iron clad water
| The cored-wire kind | Handle molten iron temperature ℃ | Handle molten iron height mm | Base iron sulphur content % | Handle back final-sulphur content % | Residual magnesium amount % | Cored-wire add-on m/t | Magnesium utilization efficiency % | Innoculant adding quantity % | Powder heart yearn unit price unit/rice | Processing cost unit/ton |
| The composite core spheroidization and inoculation line of magnesium powder core | 1480 | 600 | 0.05 | 0.012 | ≥0.04 | 35 | 50 | 0.46 | 4.3 | 150 |
| 1480 | 600 | 0.05 | 0.012 | ≥0.04 | 43 | 50 | 0.51 | 3.5 | 151 | |
| 1480 | 600 | 0.05 | 0.012 | ≥0.04 | 51 | 45 | 0 51 | 3.3 | 167 | |
| The composite core spheroidization and inoculation line of magnesium alloy powder core | 1480 | 600 | 0.05 | 0.012 | ≥0.04 | 27 | 60 | 0.54 | 5.6 | 150 |
| 1480 | 600 | 0.05 | 0.012 | ≥0.04 | 27 | 60 | 0.41 | 5.0 | 136 | |
| 1480 | 600 | 0.05 | 0.012 | ≥0.04 | 29 | 60 | 0.38 | 4.5 | 131 |
Existing nodularization, breed two lines and handle and compare, cost reduces by 20～50 yuan/ton, compares with the method for pouring, and cost reduces by 0～30 yuan/ton.
Claims (4)
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| CN104928560A (en) * | 2014-03-19 | 2015-09-23 | 北京正大银光科技有限公司 | Production technology of sandwich core-spun yarn |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88100499A (en) * | 1987-02-03 | 1988-08-17 | 阿菲瓦尔公司 | Tube-shell hybrid material suitable for molten metal bath processing |
| DE19916235A1 (en) * | 1999-03-01 | 2000-09-07 | Odermath Stahlwerkstechnik | Filled wire for treating melts, especially of cast iron to obtain a spheroidal graphite structure, comprises a metal sheathed magnesium or deformable magnesium alloy core wire |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN88100499A (en) * | 1987-02-03 | 1988-08-17 | 阿菲瓦尔公司 | Tube-shell hybrid material suitable for molten metal bath processing |
| DE19916235A1 (en) * | 1999-03-01 | 2000-09-07 | Odermath Stahlwerkstechnik | Filled wire for treating melts, especially of cast iron to obtain a spheroidal graphite structure, comprises a metal sheathed magnesium or deformable magnesium alloy core wire |
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