CN1160475C - Processing method for smelting nickel based alloy by arc furnace - Google Patents
Processing method for smelting nickel based alloy by arc furnace Download PDFInfo
- Publication number
- CN1160475C CN1160475C CNB021577943A CN02157794A CN1160475C CN 1160475 C CN1160475 C CN 1160475C CN B021577943 A CNB021577943 A CN B021577943A CN 02157794 A CN02157794 A CN 02157794A CN 1160475 C CN1160475 C CN 1160475C
- Authority
- CN
- China
- Prior art keywords
- furnace
- nickel
- smelting
- electric arc
- prepurging
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 229910052759 nickel Inorganic materials 0.000 title claims abstract description 53
- 238000003723 Smelting Methods 0.000 title claims abstract description 50
- 239000000956 alloy Substances 0.000 title claims abstract description 35
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 31
- 238000003672 processing method Methods 0.000 title claims description 8
- 238000010891 electric arc Methods 0.000 claims abstract description 47
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 33
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims abstract description 32
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 28
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 28
- 239000011449 brick Substances 0.000 claims abstract description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 19
- 229910052786 argon Inorganic materials 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 15
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims abstract description 13
- 229910000975 Carbon steel Inorganic materials 0.000 claims abstract description 10
- 239000010962 carbon steel Substances 0.000 claims abstract description 9
- 239000010439 graphite Substances 0.000 claims abstract description 5
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 5
- 238000003756 stirring Methods 0.000 claims abstract description 4
- 229910000601 superalloy Inorganic materials 0.000 claims description 38
- 229910000831 Steel Inorganic materials 0.000 claims description 34
- 239000010959 steel Substances 0.000 claims description 34
- 238000004458 analytical method Methods 0.000 claims description 19
- 238000010079 rubber tapping Methods 0.000 claims description 18
- 238000005070 sampling Methods 0.000 claims description 16
- 238000005516 engineering process Methods 0.000 claims description 14
- 239000000203 mixture Substances 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 12
- 238000002844 melting Methods 0.000 claims description 12
- 239000002893 slag Substances 0.000 claims description 11
- 241001062472 Stokellia anisodon Species 0.000 claims description 9
- 239000012266 salt solution Substances 0.000 claims description 9
- 238000005275 alloying Methods 0.000 claims description 8
- 239000004615 ingredient Substances 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 229910014458 Ca-Si Inorganic materials 0.000 claims description 5
- 239000000654 additive Substances 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000012856 packing Methods 0.000 claims description 5
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 239000011230 binding agent Substances 0.000 claims description 4
- 229910052804 chromium Inorganic materials 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 241001417490 Sillaginidae Species 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 claims description 2
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
- 239000000470 constituent Substances 0.000 claims description 2
- 210000000805 cytoplasm Anatomy 0.000 claims description 2
- 238000006356 dehydrogenation reaction Methods 0.000 claims description 2
- 238000004512 die casting Methods 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 238000007670 refining Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 239000011863 silicon-based powder Substances 0.000 claims description 2
- 238000002791 soaking Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 12
- 239000010426 asphalt Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000008520 organization Effects 0.000 abstract description 5
- 230000003647 oxidation Effects 0.000 abstract description 3
- 238000007254 oxidation reaction Methods 0.000 abstract description 3
- 238000002360 preparation method Methods 0.000 abstract description 3
- 239000012267 brine Substances 0.000 abstract description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 1
- 230000001070 adhesive effect Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 7
- 238000007499 fusion processing Methods 0.000 description 4
- 241001131796 Botaurus stellaris Species 0.000 description 3
- 239000011651 chromium Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 2
- TWRXJAOTZQYOKJ-UHFFFAOYSA-L Magnesium chloride Chemical compound [Mg+2].[Cl-].[Cl-] TWRXJAOTZQYOKJ-UHFFFAOYSA-L 0.000 description 2
- 235000011941 Tilia x europaea Nutrition 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910008455 Si—Ca Inorganic materials 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 238000000418 atomic force spectrum Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005262 decarbonization Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000006052 feed supplement Substances 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910001629 magnesium chloride Inorganic materials 0.000 description 1
- 235000012054 meals Nutrition 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
- Furnace Details (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a process for smelting a nickel-base high temperature alloy in metallurgical industry, which is characterized in that in the preparation of a furnace body, carbon steel and nickel are used for the prepurging of an electric arc furnace whose furnace liner materials are a middle-grade magnesia brick and an adhesive obtained by adding 3 to 5% of graphite to asphalt; when carbon steel is used for prepurging, an asphalt furnace liner is heated, solidified and sintered so as to form the stable structures of a micro-carbon layer, a semisintered layer and a hyle layer, and when nickel is used for prepurging, residual iron in the furnace is washed; by the preparation of a furnace body, the high temperature alloy can contain less than 1.5% of Fe during smelting, and oxidation phenomena of carbon of the furnace lining can be reduced and inhibited; the nickel-base high temperature alloy is smelted by oxygen-free smelting, argon stirring, etc. in the same electric arc furnace so as to finally obtain a low-carbon nickel-base high temperature alloy electrode bar for electroslag remelting. The present invention has the advantages of simple smelting process, low cost, convenient production and organization, and no need of the baking of furnace lining bricks and furnace bodies; compared with electric arc furnaces of brine furnace linings, the electric arc furnace in the present invention can save lining cost by 67%, and has service life greatly improved of furnace bodies; the produced electroslag product of the GH3030 nickel-base high temperature alloy meets the requirements for users.
Description
Technical field
The present invention relates to the smelting production method of metallurgy industry nickel base superalloy, refer in particular to the smelting process that electric arc furnace is produced nickel base superalloy.
Background technology
Nickel base superalloy has that alloy structure is stable, timeliness proneness is little, antioxidant property is good, welding property characteristics preferably, be the necessary important meals material of modern aeroengine, rocket engine, it can bear big stress life-time service in high temperature (referring generally to 600～1000 ℃) oxidizing atmosphere and under the exhaust gas corrosion condition.The alloying level of nickel base superalloy is higher, and elementary composition span of control such as C, Ti, Al are very narrow, and be dissolved in [Fe] element in the superalloy necessary≤1.5%, the gas clarity requires also very highly in addition, it is very big therefore to smelt difficulty.
At present, the production method of smelting nickel base superalloy mainly is " consumable electrode vacuum furnace smelting+esr " or " electric arc furnace smelting+esr " two kinds of modes, the former metallurgical control is easy, alloy mass is good, but smelting cost is very high, recovery rate of iron is also lower; The latter has that smelting cost is lower, the recovery rate of iron advantage of higher, but metallurgical control ratio difficulty, and especially Ultra-low carbon (C content is less than 0.03%) nickel base superalloy can't be produced.Therefore, Ultra-low carbon (C content is less than 0.03%) nickel base superalloy must adopt " consumable electrode vacuum furnace smelting+esr " processing method, middle low-carbon (LC) (C content is greater than 0.03%) nickel base superalloy can adopt " electric arc furnace smelting+esr " processing method, to reduce production costs, satisfy market, user's requirement.
Difference according to furnace lining material, electric arc furnace can be divided into two kinds of salt solution furnace lining electric arc furnace, pitch furnace lining electric arc furnace, the furnace lining material of the two all adopts middle-grade magnesia brick (MgO content is 95%) adding additives, the former binding agent is bittern (MgCl2 solvent+magnesia), and latter's binding agent is that pitch adds 3～5% graphite.As everyone knows: the advantage of salt solution electric arc furnace is a carbon containing not in the furnace lining material, shortcoming is that moisture content is many, and bittern furnace lining complex manufacturing technology, its price is 3 times of pitch furnace lining, brine magnesia brick before building by laying bricks or stones must be in baking under 100～200 ℃ the low temperature more than two days, salt solution stove after building by laying bricks or stones must baking be (too high as if storing temperature more than 5 days down at low temperature (promptly below 200 ℃), then can cause wherein moisture to have little time evaporation and make the furnace lining explosion), and the body of heater of salt solution electric arc furnace must use at once behind the long-time low-temperature bake, prepurging processing requirement before body of heater uses in addition is than higher, cause energy consumption to increase, body of heater is short work-ing life, is unfavorable for that cost descends and organization of production; The advantage of pitch electric arc furnace is the furnace lining material moisture content less, so all need not toast before building by laying bricks or stones and after building by laying bricks or stones, energy consumption is little, the output height, cost is low, shortcoming is to contain carbon (total carbon content is 6～8% in the asphalt tile) in the furnace lining material, in the superalloy fusion process, its magnesium carbonaceous furnace lining is vulnerable to the erosion of ferriferous oxide in the slag, thereby make the oxidation of coal in the MgO-C matter backup lining brick cause the furnace lining damage, the furnace lining that eats away enters molten steel and can cause molten steel carburetting serious, is unsuitable for smelting the nickel base superalloy that carbon is had relatively high expectations.
Therefore, at present domestic and international metallurgical manufacturers adopt " electric arc furnace smelting+esr " produce in during the low-carbon nickel based high-temperature alloy, all select the salt solution electric arc furnace that technology is complicated, cost is higher, storing time is long basically for use.
Summary of the invention
The present invention develops a kind of production method of electric arc furnace smelting nickel base superalloy, replace traditional salt solution furnace lining electric arc furnace with pitch furnace lining electric arc furnace, smelt qualified middle low-carbon nickel based high-temperature alloy (minimum C content≤0.05%, Fe content≤1.5%) electrode bar, the present invention have electric arc furnace build by laying bricks or stones before and build by laying bricks or stones after all need not toast, technology is simple, organization of production is characteristics easily, can reduce metallurgical cost greatly, satisfy customer requirements and market demand.
The processing method of electric arc furnace smelting nickel base superalloy provided by the invention, it is characterized in that: in furnace lining material is the pitch furnace lining electric arc furnace of magnesia brick (MgO 〉=95%) adding additives (pitch adds 3～5% graphite), (make asphalt tile finish heat treatment for solidification by special carbon steel prepurging, lining sintering is strengthened, furnace lining carburetting possibility in the superalloy smelting process is dropped to lower-most point) and the nickel prepurging (wash down iron remaining in the stove, when smelting with the assurance superalloy, Fe content is less than 1.5%, the corresponding minimizing of ferriferous oxide content in the slag simultaneously, also reduced the red oxidized possibility of carbon of asphalt furnace lining brick) body of heater prepare, in same electric arc furnace, carry out the nickel base superalloy melting, smelt the qualified middle low-carbon nickel based high-temperature alloy of composition, finally be cast into electrode bar, carry out esr.
The body of heater of the first step pitch furnace lining electric arc furnace is prepared.
(1) furnace lining material is that (if adopt MgO content less than 95% low-grade magnesia brick, then in the fusion process, lining erosion is bigger, causes molten steel carburetting serious, makes the superalloy composition defective for the magnesia brick of MgO content 〉=95%.) adding additives, binding agent is that pitch adds 3～5% graphite, body of heater is built by laying bricks or stones and is not forward and backwardly toasted directly use.
(2) special carbon steel prepurging technology makes the pitch furnace lining form three layers of rock steady structure of little carbon-coating, half sintered layer and protoplasm layer (from the appearance to the internal layer), has reduced the possibility of furnace lining carburetting when nickel base superalloy is smelted.During prepurging, in the carbon steel fusion process, total carbon content is that 6～8% asphalt tile has been finished heat treatment for solidification and (before 450 ℃, mainly is distillation and thermal condensation, emits gas at 450～500 ℃, form semicoke immediately, be net distribution, thereby increase brick strength, 1100 ℃ reach stable state), the MgO-C matter lining sintering of pitch electric arc furnace is strengthened, reached the dual purpose of body of heater " baking " and " prepurging ".
(3) in suitable basicity of slag and stove under the temperature, carry out nickel prepurging technology (basic identical) with salt solution furnace lining electric arc furnace nickel prepurging technology, in 4～6 hours smelting, wash down furnace bottom, furnace wall, bell, tapping spout position and the ladle of body of heater with Ni, will add strong mixing in the process and analyze [C] in the alloy, [Fe], the constant or error of [Fe] content can be come out of the stove less than 0.15% in continuous three appearance.Ni prepurging process in the pitch electric arc furnace smelting before the low-carbon nickel based high-temperature alloy, guarantee that the iron of next stove superalloy is less than 1.5% on the one hand, also reduced the ferriferous oxide content in the slag on the other hand, suppressed the oxidation of carbon in the furnace lining, reduced the decarbonization degree of MgO-C matter furnace lining, the effect of not carburetting substantially when reaching the pitch furnace lining and smelting nickel base superalloy.
Second step was adopted pitch furnace lining electric arc furnace smelting nickel base superalloy.
(1) go up stove steel (nickel prepurging) tapping and finish, the interior surplus steel residue of the prepurging that falls, body of heater is cleaned out;
(2) smelt needed alloy and auxiliary material, must carry out special processing: the sheet nickel that is used for smelting superalloy must carry out the dehydrogenation processing of deoiling of temperature baking, insulation, 300～400 ℃ of storing temperatures, soaking time 8～12 hours; Other smelts needed alloy and auxiliary material, must toast, and removes moisture content; To satisfy the higher gas clarity requirement of nickel base superalloy.
(3) alloying ingredient and suitable charging require accurately: add the interior pure Ti alloy recovery of ladle and calculate by 50%, all the other alloying constituents are allocated (superalloy smelting into by calculated amount, it is most important to prepare burden, to directly influence molten clear composition, if molten clear composition and standard difference are very big, cause a large amount of feed supplements of smelting process, this will cause fire box temperature sharply to reduce and uneven components, and quality is caused very big influence.); When filling with substance, be packaged in the outer packing iron sheet of nickel plate and all remove (, may cause that Fe exceeds standard), adorn a part of nickel plate earlier if do not remove the packing iron sheet, again around the part metals chromium of packing into, refill one deck nickel plate then, refill other alloys, that is to say that the metallic nickel pendulum is at the center, (because this smelts used all is alloy to separate the contacting of Metal Cr and electric arc, if Metal Cr is leaked to the center, electric arc is played thereon very easily carburetting during smelting), other alloy is distributed in the hopper edge.Guarantee that alloy melts clear stable components, and infusibility and carburetting phenomenon do not take place;
(4) charging is finished, big power voltage supply melted alloy material, molten clear back small voltage power supply insulation;
(5) forbid moving oxygen (oxygen blast is just fluxed), solid alloy material to melt clear back during the smelting, carry out diffusive deoxidation, make fusion process remain reduced state every adding 0.25～0.5Kg Ca-Si powder/ton steel in the clockwise smelting furnace from 5～10 minutes;
(6) total analysis of taking a sample during smelting is adjusted alloy ingredient: molten clear sampling total analysis (1); Total analysis (2) during slag white (deoxidation is good in the molten bath) is as liquid steel temperature T1=T
Melting temperatureIn the time of+50 ℃～70 ℃, sampling total analysis (3), and insert Ca-Si piece 0.15～0.25Kg/ ton steel, and carry out bulk deoxidation, apart from analyzing (3) sampling after 15～20 minutes, sampling analysis (4) is adjusted alloying element compositions such as C, Ti, Al, Cr;
When (7) taking a sample total analysis, use the metal tube of exotic materials, Argon is carried out in the molten bath stir uniform alloy composition, temperature;
(8) as liquid steel temperature T2=T
Melting temperatureAbout+150 ℃～170 ℃, white slag state (in the molten bath deoxidation all right, FeO in the slag≤0.5%) is tapping down, the tapping process argon shield.T2 is too high, the waste energy consumption, and T2 is low excessively, and the heat radiation of nickel base superalloy molten steel in the ladle is too fast, and it is low excessively to water the steel temperature, causes the steel accident of watering.
(9) tapping, the used ladle of cast are the white bags (peace and quiet ladle) that cold steel, residue are cleaned out;
(10) after the used ingot mold of cast need toast, clean out; The feed trumpet Argon is 1～5 minute before the cast, removes residual air; During die casting (the nickel base superalloy molten steel in the ladle is to feed trumpet, ingot mold cast), under the ladle argon shield is arranged, improve the gas clarity of molten steel.
In the special carbon steel prepurging technological process of collection " body of heater baking " and " prepurging ", adopt big voltage, big electric current smelting low carbon steel.
After the tapping of the nickel base superalloy molten steel of electric arc furnace smelting, if find that alloy ingredient is undesirable, the ladle that contains high-temperature molten steel can be winched to the LF refining furnace, the sampling total analysis is also finely tuned alloy ingredient according to analytical results.
Compare with prior art, the present invention has following advantage:
1, before nickel base superalloy was smelted, pitch furnace lining firebrick and body of heater all need not toast.
2, smelting technology is simple, organization of production is convenient.
3, production cost is low, and only the furnace lining material expense has descended 67%.
4, equipment and technology highly versatile: the Special Baking room that must not be provided for refractory brick.
Specific embodiments
Certain Iron And Steel Company implements patent of the present invention; with pitch furnace lining electric arc furnace smelting 1 stove low-carbon nickel based high-temperature alloy---GH3030; its technical process is that 20 tons of ac arc furnaces just refine (tapping spout tapping; argon shield tapping adds pure Ti and adjusts composition) → 20 tons go out ladle (BOTTOM ARGON BLOWING) → φ 430 electrode bars (argon for protecting pouring).When " the body of heater preparation " of pitch furnace lining electric arc furnace; at first; smelt 7 stove carbon steels; the molten clear carbon of first three stove is less than 1.0%, and four stoves molten clear carbon in back is less than 0.60%, and purpose is protected and sintered lining; adopt the remelting of scrap to smelt 2 stove stainless steels again; join carbon less than 0.30%, forbid that oxygen blast fluxes, avoid molten steel or bits are blown and spatter or bell.Secondly, smelt the nickel prepurging, last stove tapping is finished furnace bottom and is added lime 400kg, and CaF2100Kg adopts 320V, 15KA press supply power to basic molten clear, after change 233V into, 10KA is incubated; The control electrical force profiles makes the temperature all-the-time stable at 1580～1630 ℃ during the smelting, behind the molten clear 40min, comes out of the stove and about 2/3 washes ladle and refund stove and mix and dash with even composition and temperature; Be 5 hours tap to tap time, molten clear finishing every 20min sampling analysis carbon and iron level, and the carbon content all-the-time stable is 0.01%, and continuous three of iron level is 2.05%, 2.02%, 2.03%, comes out of the stove after constant substantially; Tapping temperature is 1524 ℃.At last, in same electric arc furnace, carry out the nickel base superalloy melting: the 230min during smelting of (1) this stove steel; Last stove steel goes out to finish furnace bottom and adds lime 400kg, CaF2100Kg, 233V is adopted in power supply, 15KA power and changes 320V into after ten minutes, 15KA, power voltage supply be to basic molten clear, after change 148V into, 10KA is incubated; Molten clear back adds the Si-Ca powder every 5～10min, and is good to guarantee reduction; Molten clear sampling total analysis (1), total analysis (2) during slag white (the basic oxygen of oxygen is clear in the molten bath), when liquid steel temperature T1=T melting temperature+50 ℃～70 ℃=1480～1500 ℃ (T melting temperature=1435 ℃), sampling total analysis (3), and insert Ca-Si piece 0.15～0.25Kg/ ton steel, carry out bulk deoxidation, apart from analyzing (3) sampling after 20 minutes, sampling analysis (4) is adjusted alloying element compositions such as C, Ti, Al, Cr; For impelling composition and temperature even, except that the rake stirring is smash in employing, also in the electric arc furnace molten bath, be blown into argon gas before the thermometric sampling with special-purpose Argon pipe; Reduction is got three cup samples the later stage and is done and forge experiment, forges all crackings of three of processes, shows that reduction effect is good; Tapping temperature T2=T melting temperature+150 ℃～about 170 ℃=1600 ℃.(2) the process argon shield of coming out of the stove, with contracting out steel in vain, cylinder-packing is cleaned out.(3) T waters steel temperature=T melting temperature+100 ℃=about 1530 ℃; cast goes in the feed trumpet blowing argon gas 3 minutes to catch up with air to the greatest extent wherein; pour into a mould 6 of 430 electrode bars; the head box mouth is installed on the ingot mould; pouring into a mould used ingot mould all toasts and cleans out the back and use; wooden frame protection cast in the mould is watered complete cap mouth and is added special-purpose heat-generating agent.Cover fiber powder one bag then, annotate and finish lifting in 2 hours, the mould demoulding in cold 8 hours, melt mould, sticking iron grind clean, and cap mouth flash cuts only.Implement patent of the present invention, smelting technology is simple, organization of production is convenient, production cost is low, and pitch furnace lining firebrick and body of heater all need not toast, and compares with the salt solution electric arc furnace that the bittern furnace lining is made, can save the furnace lining material expense and descend 67%, the electric arc furnace life-span is brought up to 80 stoves from 25 stoves; The GH3030 nickel base superalloy of producing is made finished product through electroslag with after forging, and meets customer requirements.
Claims (3)
1, the processing method of electric arc furnace smelting nickel base superalloy, it is characterized in that in furnace lining material is the pitch furnace lining electric arc furnace of magnesia brick adding additives, body of heater by special carbon steel prepurging and nickel prepurging is prepared, in same electric arc furnace, carry out the nickel base superalloy melting, smelt the qualified middle low-carbon nickel based high-temperature alloy of composition, finally be cast into electrode bar, be used for esr:
The body of heater of the first step pitch furnace lining electric arc furnace is prepared;
(1) furnace lining material is the magnesia brick adding additives of MgO content 〉=95%, and binding agent is that pitch adds 3～5% graphite, and body of heater is built by laying bricks or stones and forward and backwardly do not toasted;
(2) special carbon steel prepurging technology makes the pitch furnace lining form three layers of rock steady structure of little carbon-coating, half sintered layer and protoplasm layer from the appearance to the internal layer;
(3) in suitable basicity of slag and stove under the temperature, carry out and the essentially identical nickel prepurging of salt solution furnace lining electric arc furnace nickel prepurging technology technology, in 4～6 hours smelting, wash down furnace bottom, furnace wall, bell, tapping spout position and the ladle of body of heater with Ni, will add strong mixing in the process and analyze [C] in the alloy, [Fe], the constant or error of [Fe] content can be come out of the stove less than 0.15% in continuous three appearance;
Second step was adopted pitch furnace lining electric arc furnace smelting nickel base superalloy;
(1) the last stove steel tapping of nickel prepurging is finished, the interior surplus steel residue of the prepurging that falls, and body of heater is cleaned out;
(2) smelt needed alloy and auxiliary material, must carry out special processing: the sheet nickel that is used for smelting superalloy must carry out the dehydrogenation processing of deoiling of temperature baking, insulation, 300～400 ℃ of storing temperatures, soaking time 8～12 hours; Other smelts needed alloy and auxiliary material, must toast, and removes moisture content;
(3) alloying ingredient and suitable charging require accurately: add the interior pure Ti alloy recovery of ladle and calculate by 50%, all the other alloying constituents are allocated into by calculated amount; When filling with substance is packaged in the outer packing iron sheet of nickel plate and all removes, and metallic nickel is put at the center, separates contacting of Metal Cr and electric arc, and other alloy is distributed in the hopper edge;
(4) charging is finished, big power voltage supply melting solid alloy material, molten clear back small voltage power supply insulation;
(5) forbid during the smelting to move oxygen, just forbid oxygen blast to be fluxed, the molten clear back of solid alloy material is every added 0.25～0.5Kg Ca-Si powder/ton steel in the clockwise smelting furnace from 5～10 minutes;
(6) total analysis of taking a sample during smelting is adjusted alloy ingredient: molten clear sampling total analysis (1); Total analysis when slag is white (2) is as liquid steel temperature T1=T
Melting temperatureIn the time of+50 ℃～70 ℃, the sampling total analysis
(3), and insert Ca-Si piece 0.15～0.25Kg/ ton steel, apart from analyzing (3) sampling after 15～20 minutes, sampling analysis (4) is adjusted alloying element compositions such as C, Ti, Al, Cr;
When (7) taking a sample total analysis, use the metal tube of exotic materials, Argon is carried out in the molten bath stir;
(8) as liquid steel temperature T2=T
Melting temperature+ 150 ℃～170 ℃, the white slag state is tapping down, the tapping process argon shield;
(9) tapping, the used ladle of cast are the white bags that cold steel, residue are cleaned out;
(10) after the used ingot mold of cast need toast, clean out; The feed trumpet Argon is 1～5 minute before the cast; During die casting, under the ladle argon shield is arranged.
2, the processing method of electric arc furnace smelting nickel base superalloy according to claim 1, it is characterized in that: integrate in the special carbon steel prepurging process of " body of heater baking " and " prepurging ", technology point is to adopt big voltage, big electric current smelting low carbon steel.
3, the processing method of electric arc furnace smelting nickel base superalloy according to claim 1, it is characterized in that: after the nickel base superalloy molten steel tapping of electric arc furnace smelting, if find that alloy ingredient is undesirable, the ladle that contains high-temperature molten steel can be winched to the LF refining furnace, the sampling total analysis is also finely tuned alloy ingredient according to analytical results.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021577943A CN1160475C (en) | 2002-12-26 | 2002-12-26 | Processing method for smelting nickel based alloy by arc furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021577943A CN1160475C (en) | 2002-12-26 | 2002-12-26 | Processing method for smelting nickel based alloy by arc furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1424415A CN1424415A (en) | 2003-06-18 |
| CN1160475C true CN1160475C (en) | 2004-08-04 |
Family
ID=4753003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021577943A Expired - Lifetime CN1160475C (en) | 2002-12-26 | 2002-12-26 | Processing method for smelting nickel based alloy by arc furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1160475C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105087983B (en) * | 2015-09-10 | 2017-03-01 | 西北有色金属研究院 | A kind of preparation method of nickel-base alloy ingot |
| CN106756148B (en) * | 2016-12-05 | 2018-03-13 | 北京科技大学 | The method that a kind of foundry alloy method of low oxygen content prepares MIM418 alloys |
| CN109317611A (en) * | 2018-11-15 | 2019-02-12 | 安徽应流集团霍山铸造有限公司 | A kind of sand mould casting method of nickel base superalloy casting |
| CN115537603B (en) * | 2021-06-30 | 2023-08-11 | 宝武特种冶金有限公司 | High-temperature-resistant nickel-based alloy, manufacturing method and application thereof |
-
2002
- 2002-12-26 CN CNB021577943A patent/CN1160475C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1424415A (en) | 2003-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111378848B (en) | Pre-melted slag for electroslag remelting for improving purity of GH4169 alloy return and preparation method thereof | |
| CN102758144B (en) | Production method for steel ingot of large-sized high-nitrogen retaining ring steel | |
| CN103642976A (en) | H13 steel smelting process | |
| CN102618795B (en) | Smelting process of nitrogenous high alloy heat-resistant steel ZG3Cr24Ni7N | |
| CN101403068A (en) | Austenitic ductile iron and method for producing same | |
| CN110777281A (en) | Production method of cupronickel alloy round ingot | |
| US3198624A (en) | Process for the manufacture of stainless steel | |
| CN1321213C (en) | Smelting manufacturing method for high temperature ferric alloy | |
| CN103627971A (en) | Alloy structural steel for large-specification soldering tools and smelting method thereof | |
| CN100525987C (en) | High strength aluminum alloy welding wire and its preparing method | |
| CN104762488B (en) | A kind of method of direct vanadium alloying in esr process | |
| CN105603257B (en) | Production method of high-quality ferro-titanium | |
| CN109252084A (en) | A kind of preparation process of high-purity GH825 alloy fine grain plate | |
| CN1160475C (en) | Processing method for smelting nickel based alloy by arc furnace | |
| CN112430756A (en) | Niobium-iron alloy production method | |
| EP4092148A1 (en) | Manganese aluminum alloy and preparation method therefor | |
| US3615348A (en) | Stainless steel melting practice | |
| CN111455279A (en) | Iron-aluminum alloy and preparation method thereof | |
| KR101665467B1 (en) | Fabrication Method of Ferro Alloy by Thermit Reaction of Oxidation-Reduction | |
| CN116516205A (en) | High-temperature alloy GH710 alloy steel ingot for turbine disk and preparation method thereof | |
| RU2699468C1 (en) | Steel production method | |
| JPS58133338A (en) | Method for melting titanium group metal or alloy thereof | |
| CN101230423A (en) | Method for manufacturing high-titanium ferrotitanium | |
| CN105779820B (en) | The production method of low impurity content ferrotianium | |
| CN1331351A (en) | Process for smelting high-grade manganese blocks directly from electrolytic manganese as raw material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20081219 Address after: Orchard, Fujin Road, Baoshan District, Shanghai Patentee after: BAOSHAN IRON & STEEL Co.,Ltd. Address before: No. 333 Tongji Road, Shanghai, Baoshan District Patentee before: SHANGHAI NO 5 STEEL Co.,Ltd. BAO |
|
| ASS | Succession or assignment of patent right |
Owner name: BAOSHAN IRON + STEEL CO., LTD. Free format text: FORMER OWNER: SHANGHAI NO.5 IRON AND STEEL CO LTD, BAOSHAN IRON AND STEEL GROUP Effective date: 20081219 |
|
| ASS | Succession or assignment of patent right |
Owner name: BAOSTEEL SPECIAL STEEL CO., LTD. Free format text: FORMER OWNER: BAOSHAN IRON + STEEL CO., LTD. Effective date: 20140107 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201900 BAOSHAN, SHANGHAI TO: 200940 BAOSHAN, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140107 Address after: 200940 Baoshan District aquatic Road, Shanghai, No. 1269 Patentee after: BAOSTEEL SPECIAL STEEL Co.,Ltd. Address before: 201900 Fujin Road, Shanghai, orchard, Baoshan District Patentee before: BAOSHAN IRON & STEEL Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20200512 Address after: 200940 room 1277, building 216, 1269 Shuishui Road, Baoshan District, Shanghai Patentee after: Baowu Special Metallurgy Co.,Ltd. Address before: 200940 No. 1269, Fisheries Road, Shanghai, Baoshan District Patentee before: BAOSTEEL SPECIAL STEEL Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20040804 |
|
| CX01 | Expiry of patent term |