CN1641248A - Nodular cast iron piston ring - Google Patents
Nodular cast iron piston ring Download PDFInfo
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- CN1641248A CN1641248A CN 200410075401 CN200410075401A CN1641248A CN 1641248 A CN1641248 A CN 1641248A CN 200410075401 CN200410075401 CN 200410075401 CN 200410075401 A CN200410075401 A CN 200410075401A CN 1641248 A CN1641248 A CN 1641248A
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- piston ring
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- titanium
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- 229910001141 Ductile iron Inorganic materials 0.000 title claims abstract description 41
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 99
- 239000000203 mixture Substances 0.000 claims abstract description 56
- 239000000126 substance Substances 0.000 claims abstract description 42
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 20
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 20
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 19
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 19
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 19
- 229910052720 vanadium Inorganic materials 0.000 claims abstract description 19
- 229910052742 iron Inorganic materials 0.000 claims description 44
- 238000005266 casting Methods 0.000 claims description 33
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 29
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 28
- 238000003754 machining Methods 0.000 claims description 23
- 239000010936 titanium Substances 0.000 claims description 23
- 229910052799 carbon Inorganic materials 0.000 claims description 22
- 239000011651 chromium Substances 0.000 claims description 21
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 20
- 229910052804 chromium Inorganic materials 0.000 claims description 20
- 239000011777 magnesium Substances 0.000 claims description 20
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 20
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 19
- 239000005864 Sulphur Substances 0.000 claims description 19
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 19
- 239000011572 manganese Substances 0.000 claims description 19
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims description 19
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 claims description 18
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 18
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 18
- 239000011574 phosphorus Substances 0.000 claims description 18
- 239000010703 silicon Substances 0.000 claims description 18
- 239000011159 matrix material Substances 0.000 claims description 16
- 239000010949 copper Substances 0.000 claims description 15
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 150000002910 rare earth metals Chemical class 0.000 claims description 14
- 239000012535 impurity Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 35
- 239000000463 material Substances 0.000 description 33
- 238000011081 inoculation Methods 0.000 description 30
- GFNGCDBZVSLSFT-UHFFFAOYSA-N titanium vanadium Chemical compound [Ti].[V] GFNGCDBZVSLSFT-UHFFFAOYSA-N 0.000 description 21
- 238000005303 weighing Methods 0.000 description 20
- 238000012545 processing Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 13
- 239000000047 product Substances 0.000 description 12
- 238000004458 analytical method Methods 0.000 description 11
- 229910000805 Pig iron Inorganic materials 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 10
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 10
- MIDOFQRPAXDZET-UHFFFAOYSA-N [Si].[Sr] Chemical compound [Si].[Sr] MIDOFQRPAXDZET-UHFFFAOYSA-N 0.000 description 10
- 229910052787 antimony Inorganic materials 0.000 description 10
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 10
- OOJQNBIDYDPHHE-UHFFFAOYSA-N barium silicon Chemical compound [Si].[Ba] OOJQNBIDYDPHHE-UHFFFAOYSA-N 0.000 description 10
- 239000012467 final product Substances 0.000 description 10
- 239000000155 melt Substances 0.000 description 10
- 238000010309 melting process Methods 0.000 description 10
- 238000012856 packing Methods 0.000 description 10
- 238000007747 plating Methods 0.000 description 10
- 238000002360 preparation method Methods 0.000 description 10
- 238000005070 sampling Methods 0.000 description 10
- 239000010959 steel Substances 0.000 description 10
- 229910000906 Bronze Inorganic materials 0.000 description 6
- 239000010974 bronze Substances 0.000 description 6
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 6
- 229910002804 graphite Inorganic materials 0.000 description 6
- 239000010439 graphite Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- SKKMWRVAJNPLFY-UHFFFAOYSA-N azanylidynevanadium Chemical compound [V]#N SKKMWRVAJNPLFY-UHFFFAOYSA-N 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 2
- 229910001096 P alloy Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910001567 cementite Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 1
- 229910000734 martensite Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
Landscapes
- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention discloses a type of nodular cast iron piston ring, which is formed according foundry and fabricating with nodular cast iron as its palasome. Its character rests on that it contains the following chemical compositions (percentages by weight): C 2.5-4.5%, Si 1.5-3.5%, Mn 0.05-1.0%, S 0.01-0.1%, P 0.01-0.3%, V 0.1-0.4%, Ti 0.05-0.3%, Mg 0.01-0.05%. The other is Fe and slight amount impurity unavoidable. The invention has fine wearlessness and long life length.
Description
(1) technical field: the present invention relates to gas engine part piston ring technical field, relate in particular to a kind of ductile iron piston ring that contains V-Ti.
(2) background technique: the piston ring that uses on internal-combustion engine at present, though structure and size differ bigger, its material that uses mostly is spheroidal graphite cast iron.Because spheroidal graphite cast iron has good strength character, wear resistance, corrosion stability, damping property, thereby in internal-combustion engine manufacturing industry, be widely used in the strength member frayed, heavily stressed as bent axle, cylinder sleeve, steam valve, piston, piston ring and gear etc., that percussion is arranged.And along with the retrofit of progress of science and technology and machinery, the raising of the various performance index of machinery makes various components of machine propose to upgrade higher requirement aspect the selecting for use of material.As technical field of internal combustion engines, piston ring belongs to a very important part, and adopt ductile cast iron material for many years as first-selected materials always, because the Chemical composition of itself does not change always, thereby its using property data can not be improved, only employed piston ring is an example on the motorcycle, because 1900-2100 hour back piston ring of general use follows the string under heating status, thereby the high as easy as rolling off a log plow cylinder sleeve of piston ring of friction ractor, cause the increase of vehicle maintenance expense, therefore it is good to seek a kind of new wear-resisting property, and the mistake bullet time is long, and the piston ring of long service life is that those skilled in the art of the present technique are studying improved problem always.
(3) summary of the invention: the objective of the invention is to improve the deficiency of above-mentioned prior art, and provide a kind of wear-resisting property good, the mistake bullet time is long, a kind of ductile iron piston ring of long service life.
Purpose of the present invention can reach by following measure: a kind of ductile iron piston ring, it is to be that matrix forms through casting and machining with spheroidal graphite cast iron, it is characterized in that containing in this piston ring following chemical composition (percetage by weight): all the other are iron and inevitable microimpurity carbon 2.5-4.5% silicon 1.5-3.5% manganese 0.05-1.0% sulphur 0.01-0.1% phosphorus 0.01-0.3% vanadium 0.1-0.4% titanium 0.05-0.3% magnesium 0.01-0.05%.
In order further to realize purpose of the present invention containing following chemical composition (percetage by weight) in this piston ring: all the other are iron and inevitable microimpurity carbon 3.0-4.0% silicon 2.0-3.0% manganese 0.1-0.6% sulphur 0.03-0.07% phosphorus 0.05-0.1% vanadium 0.2-0.35% titanium 0.1-0.25% magnesium 0.02-0.04%
In order further to realize purpose of the present invention also containing following at least a chemical composition (percetage by weight) in this piston ring:
Copper 0.2-1.2% chromium 0.1-1.0% rare earth 0.01-0.05%.
In order further to realize purpose of the present invention also containing following at least a chemical composition (percetage by weight) in this piston ring:
Copper 0.4-1.0% chromium 0.3-0.7% rare earth 0.02-0.04%
The reasons are as follows of the active chemical design considerations of a kind of ductile iron piston ring of the present invention and qualification content range:
Carbon (c): carbon is the important element that influences material hardness, toughness and wear resistance, and the too high then hardness of carbon is low, and toughness and intensity index reduce, and wear resistance is also had adverse effect; And the carbon amount is low excessively, and then material produces fragility, and product is frangibility in processing and using process, thus the content of carbon to be controlled at 3.0-4.0% more suitable.
Silicon (Si): silicon amount Gao Zeyi produces fragility, and product is frangibility in processing and using process, and causes product coating in conjunction with bad, reduce wear-resisting property, the low material fragility that easily causes of silicon amount increases the product processing difficulties, it is serious to fracture, thus the content of silicon to be controlled at 2.0-3.0% more suitable.
Manganese (Mn): manganese can neutralize and subdue the illeffects of sulphur, is beneficial to spheroidization of graphite, has certain alloy strengthening effect simultaneously.But the too high intergranular carbide deviation that then produces of manganese amount causes material fragility to increase, thus the content of manganese to be controlled at 0.1-0.6% more suitable.
Sulphur (S): sulphur is the harmful element that raw material are brought into, can reduce the content of sulphur by spheroidizing, reaching the purpose of spheroidization of graphite, so the content of sulphur to be controlled at 0.01-0.05% more suitable.
Phosphorus (P): phosphorus is the harmful element that raw material are brought into, and phosphorus amount height causes material fragility serious, thus the content of phosphorus to be controlled at 0.01-0.1% more suitable.
Magnesium (Mg): magnesium is the spheroidization of graphite element, it is the spheroidizing main adding elements, content of magnesium is crossed low then graphite can not nodularization or abnormal nodularizing, cause material to scrap, the too high material fragility that then causes of content of magnesium increases, the product reject rate increases and frangibility, thus the content of magnesium to be controlled at 0.02-0.05% more suitable.
Vanadium (V): vanadium has bigger solid solution capacity in cast iron, thereby can strengthen the refinement matrix significantly, improve material hardness, resistance to flexure, the wear resistance of product and thermostability, vanadium have stronger affinity with carbon, nitrogen unit in cast iron, form vanadium carbide and vanadium nitride, form good wear-resisting hard item, improve the wear-resisting property of material, but the too high fragility of material that then makes of vanadium amount increases the resistance to flexure reduction, product processing difficulties frangibility, thus the content of vanadium to be controlled at 0.1-0.35% more suitable.
Titanium (Ti): titanium have stronger affinity with carbon, nitrogen unit in cast iron, form titanium carbide and titanium nitride, form good wear-resisting hard item, significantly improve the wear-resisting property of material, but the too high fragility of material that then makes of titanium amount increases, cause product processing difficulties frangibility, thus the content of titanium to be controlled at 0.1-0.25% more suitable.
Copper (Cu): the main effect of copper is the refinement matrix, improves material hardness, resistance to flexure and wear resistance, but the copper too high levels then produces the intergranular deviation, causes the toughness of material index to reduce, cost of production increases, thus the content of copper to be controlled at 0.4-1.0% more suitable.
Chromium (Cr): the main effect of chromium is by refinement and improves the matrix structure, improve material hardness, fatigue resistance, crooked yield limit is significantly improved, and then improves the wear resistance and the thermostability of product, but the chromium too high levels, then producing the material resistance to flexure reduces, increase fragility, cause the product frangibility, thus the content of chromium to be controlled at 0.1-0.5% more suitable.
Rare earth (RE): rare earth is the spheroidization of graphite element, in can be significantly and the illeffects of nodularization interference element titanium, Sb, it is the indispensable element of spheroidizing, but its too high levels can cause the sheetization of graphite spheroid, the material combination property is reduced, thus the content of rare earth to be controlled at 0.01-0.05% more suitable.
Compared with the prior art the present invention has following outstanding substantive distinguishing features and obvious improvement: the first is because the technology used in the present invention solution is on the basis of existing casting material and production technology spheroidal graphite cast iron to be increased to contain V-Ti, the vanadium titanium is for nitrogen, carbon has stronger binding ability, very easily generate titanium carbide, vanadium carbide, titanium nitride, vanadium nitride, these materials are the hard phases with higher hardness, the wear resistance of first slip surface that hardness constituted of the combination of four kinds of hard phases is high, thereby reduced the rate of wear, and because these compound highly disperseds distributions, strengthened matrix, so the rate of wear of cylinder sleeve is also alleviated.Through relevant department the product in product of the present invention and the prior art is compared detection, wear resistance has improved 40%, is 41.5% to the high phosphorus alloy cylinder sleeve amount of reducing wear; It two is piston rings of the present invention because the metal mold carbide that contains, nitride has high-melting-point, high hardness, high temperature, characteristics such as chemical stability, thereby make piston ring of the present invention have fatigue resistance in the use of hot state, the high thermostability characteristics of crooked yield limit, lose the bullet time more than 7800 hours through evidence piston ring of the present invention, be mistake bullet time 1900-2100 hour more than three times of piston ring in the prior art, thereby make piston ring of the present invention than prolonging greatly the working life of the piston ring of prior art, thereby also improved the working life and the efficient of internal-combustion engine, reduced maintenance expenses; Its its background structure of nodular cast iron refinement of three piston rings of the present invention, through metallurgical analysis: tempered martensite is greater than 98%, proeutectoid cementite is less than 1%, retained austenite is less than 2%, the stability of piston ring under hot state is reached more than 95%, resistance to flexure σ w reaches 1100-1400MPa, has improved fatigue strength and crooked yield limit under the hot state of piston ring of the present invention, has ensured that the object of the invention is accomplished comprehensively.
(4) embodiment: following the specific embodiment of the present invention is elaborated:
Embodiment 1:
A kind of ductile iron piston ring (it is to be matrix with spheroidal graphite cast iron) forms through casting and machining, by chemical composition requirement of the present invention with L04 pig iron 60kg, vanadium titanium material iron 90kg, vanadium titanium foundry returns 55kg steel scrap 7.5kg, iron end 44kg place in the middle frequency furnace respectively, middle frequency furnace casting melting process according to routine requires to operate, and temperature melts in time more than 1600 ℃ and finishes in the control stove; Take by weighing the 2.0kg of magnesium group by the capacity of nodularization bag and place in the nodularization bag as nodulant, pour the molten iron of above-mentioned fusing then into, the time is to get final product in 65 seconds.Described preparation process comprise current-following inoculation, the bag in breed, three processes of mould cavity inoculation, take by weighing the silicon strontium and account for 1.6kg, silicon barium 0.8kg, antimony, tin all measure account for 0.2kg as inovulant and mix mix thoroughly after, breed operation according to inoculation method conventional in the casting process.After this can obtain the piston ring of present embodiment of the present invention according to the processing of technology methods such as the machining that has piston ring now, plating, packing.Chemical analysis is carried out in sampling, and its chemical composition (percetage by weight) is: all the other are iron and inevitable microimpurity carbon 4.5% silicon 3.5% manganese 1.0% sulphur 0.1% phosphorus 0.3% vanadium 0.4% titanium 0.3% magnesium 0.05%.
Embodiment 2:
A kind of ductile iron piston ring (it is to be matrix with spheroidal graphite cast iron) forms through casting and machining, by chemical composition requirement of the present invention with L04 pig iron 60kg, vanadium titanium material iron 85kg, vanadium titanium foundry returns 50kg steel scrap 7.5kg, copper 1.30kg, chromium 1.7kg, iron end 44kg place in the middle frequency furnace respectively, middle frequency furnace casting melting process according to routine requires to operate, and temperature melts in time more than 1600 ℃ and finishes in the control stove; Take by weighing respectively by the capacity of nodularization bag and to place respectively in the nodularization bag after T1-B magnesium-rare earth 2.6kg, the 1.7kg of magnesium group mix it as nodulant, pour the molten iron of above-mentioned fusing then into, the time is to get final product in 65 seconds.Described preparation process comprise current-following inoculation, the bag in breed, three processes of mould cavity inoculation, take by weighing the silicon strontium and account for 1.6kg, silicon barium 0.7kg, antimony, tin all measure account for 0.2kg as inovulant and mix mix thoroughly after, breed operation according to inoculation method conventional in the casting process.After this can obtain the piston ring of present embodiment of the present invention according to the processing of technology methods such as the machining that has piston ring now, plating, packing.Chemical analysis is carried out in sampling, and its chemical composition (percetage by weight) is: all the other are iron and inevitable microimpurity carbon 4.0% silicon 3.0% manganese 0.6% sulphur 0.03% phosphorus 0.1% bronze medal 1.0% chromium 0.7% vanadium 0.35% titanium 0.25% rare earth 0.05% magnesium 0.02%.
Embodiment 3:
A kind of ductile iron piston ring (it is to be matrix with spheroidal graphite cast iron) forms through casting and machining, by chemical composition requirement of the present invention with L04 pig iron 90kg, vanadium titanium material iron 40kg, vanadium titanium foundry returns 45kg, steel scrap 20kg, copper 1.4kg, iron end 50kg place in the middle frequency furnace respectively, middle frequency furnace casting melting process according to routine requires to operate, and temperature melts in time more than 1600 ℃ and finishes in the control stove; Take by weighing respectively by the capacity of nodularization bag and to place respectively in the nodularization bag after T1-B magnesium-rare earth 2.4kg, the 1.9kg of magnesium group mix it as nodulant, pour the molten iron of above-mentioned fusing then into, the time is to get final product in 65 seconds.Described preparation process comprise current-following inoculation, the bag in breed, three processes of mould cavity inoculation, take by weighing the silicon strontium and account for 1.2kg, silicon barium 0.4kg, antimony, tin all measure account for 0.16kg as inovulant and mix mix thoroughly after, breed operation according to inoculation method conventional in the casting process.After this can obtain the piston ring of present embodiment of the present invention according to the processing of technology methods such as the machining that has piston ring now, plating, packing.Chemical analysis is carried out in sampling, and the chemical composition of its piston ring (percetage by weight) is: all the other are iron and inevitable microimpurity carbon 2.5% silicon 1.5% manganese 0.05% sulphur 0.07% phosphorus 0.05% bronze medal 0.2% vanadium 0.2% titanium 0.05% rare earth 0.01% magnesium 0.01%.
Embodiment 4:
A kind of ductile iron piston ring (it is to be matrix with spheroidal graphite cast iron) forms through casting and machining, by chemical composition requirement of the present invention with L04 pig iron 95kg, vanadium titanium material iron 45kg, vanadium titanium foundry returns 45kg, steel scrap 20kg, copper 1.4kg, chromium 1.6kg, iron end 42kg place in the middle frequency furnace respectively, middle frequency furnace casting melting process according to routine requires to operate, and temperature melts in time more than 1600 ℃ and finishes in the control stove; Take by weighing respectively by the capacity of nodularization bag and to place respectively in the nodularization bag after T1-B magnesium-rare earth 2.4kg, the 1.9kg of magnesium group mix it as nodulant, pour the molten iron of above-mentioned fusing then into, the time is to get final product in 65 seconds.Described preparation process comprise current-following inoculation, the bag in breed, three processes of mould cavity inoculation, take by weighing the silicon strontium and account for 1.2kg, silicon barium 0.4kg, antimony, tin all measure account for 0.16kg as inovulant and mix mix thoroughly after, breed operation according to inoculation method conventional in the casting process.After this can obtain the piston ring of present embodiment of the present invention according to the processing of technology methods such as the machining that has piston ring now, plating, packing.Chemical analysis is carried out in sampling, and the chemical composition of its piston ring (percetage by weight) is: all the other are iron and inevitable microimpurity carbon 3.0% silicon 2.0% manganese 0.1% sulphur 0.01% phosphorus 0.01% bronze medal 0.4% chromium 0.1% vanadium 0.1% titanium 0.1% rare earth 0.02% magnesium 0.04%.
Embodiment 5:
A kind of ductile iron piston ring (it is to be matrix with spheroidal graphite cast iron) forms through casting and machining, by chemical composition requirement of the present invention with L04 pig iron 80kg, vanadium titanium material iron 80kg, vanadium titanium foundry returns 55kg, steel scrap 7kg, copper 2.0kg, chromium 1.0kg, iron end 26kg place in the middle frequency furnace respectively, middle frequency furnace casting melting process according to routine requires to operate, and temperature melts in time more than 1600 ℃ and finishes in the control stove; Take by weighing respectively by the capacity of nodularization bag and to place respectively in the nodularization bag after T1-B magnesium-rare earth 3.0kg, the 1.8kg of magnesium group mix it as nodulant, pour the molten iron of above-mentioned fusing then into, the time is to get final product in 65 seconds.Described preparation process comprise current-following inoculation, the bag in breed, three processes of mould cavity inoculation, take by weighing the silicon strontium and account for 1.4kg, silicon barium 0.5kg, antimony, tin all measure account for 0.18kg as inovulant and mix mix thoroughly after, breed operation according to inoculation method conventional in the casting process.After this can obtain the piston ring of present embodiment of the present invention according to the processing of technology methods such as the machining that has piston ring now, plating, packing.Chemical analysis is carried out in sampling, and the chemical composition of its piston ring (percetage by weight) is: all the other are iron and inevitable microimpurity carbon 3.5% silicon 2.5% manganese 0.6% sulphur 0.05% phosphorus 0.1% bronze medal 1.2% chromium 0.3% vanadium 0.25% titanium 0.20% rare earth 0.04% magnesium 0.03%.
Embodiment 6:
A kind of ductile iron piston ring (it is to be matrix with spheroidal graphite cast iron) forms through casting and machining, by chemical composition requirement of the present invention with L04 pig iron 85kg, vanadium titanium material iron 75kg, vanadium titanium foundry returns 40kg, steel scrap 7.2kg, copper 2.0kg, chromium 1.8kg, iron end 39kg place in the middle frequency furnace respectively, middle frequency furnace casting melting process according to routine requires to operate, and temperature melts in time more than 1600 ℃ and finishes in the control stove; Take by weighing the 2.0kg of magnesium group by the capacity of nodularization bag and place in the nodularization bag as nodulant, pour the molten iron of above-mentioned fusing then into, the time is to get final product in 65 seconds.Described preparation process comprise current-following inoculation, the bag in breed, three processes of mould cavity inoculation, take by weighing the silicon strontium and account for 1.6kg, silicon barium 0.6kg, antimony, tin all measure account for 0.16kg as inovulant and mix mix thoroughly after, breed operation according to inoculation method conventional in the casting process.After this can obtain the piston ring of present embodiment of the present invention according to the processing of technology methods such as the machining that has piston ring now, plating, packing.Chemical analysis is carried out in sampling, and the chemical composition of its piston ring (percetage by weight) is: all the other are iron and inevitable microimpurity carbon 4.0% silicon 3.0% manganese 0.1% sulphur 0.03% phosphorus 0.02% bronze medal 0.7% chromium 0.3% vanadium 0.18% titanium 0.17% magnesium 0.035%.
Embodiment 7:
A kind of ductile iron piston ring (it is to be matrix with spheroidal graphite cast iron) forms through casting and machining, by chemical composition requirement of the present invention with L04 pig iron 70kg, vanadium titanium material iron 70kg, vanadium titanium foundry returns 50kg, steel scrap 20kg, chromium 1.6kg, iron end 37kg place in the middle frequency furnace respectively, middle frequency furnace casting melting process according to routine requires to operate, and temperature melts in time more than 1600 ℃ and finishes in the control stove; Take by weighing respectively by the capacity of nodularization bag and to place respectively in the nodularization bag after T1-B magnesium-rare earth 2.5kg, the 1.8kg of magnesium group mix it as nodulant, pour the molten iron of above-mentioned fusing then into, the time is to get final product in 65 seconds.Described preparation process comprise current-following inoculation, the bag in breed, three processes of mould cavity inoculation, take by weighing the silicon strontium and account for 1.2kg, silicon barium 0.4kg, antimony, tin all measure account for 0.16kg as inovulant and mix mix thoroughly after, breed operation according to inoculation method conventional in the casting process.After this can obtain the piston ring of present embodiment of the present invention according to the processing of technology methods such as the machining that has piston ring now, plating, packing.Chemical analysis is carried out in sampling, and the chemical composition of its piston ring (percetage by weight) is: all the other are iron and inevitable microimpurity carbon 3.0% silicon 2.0% manganese 0.4% sulphur 0.02% phosphorus 0.08% chromium 1.0% vanadium 0.15% titanium 0.15% rare earth 0.03% magnesium 0.04%.
Embodiment 8:
A kind of ductile iron piston ring (it is to be matrix with spheroidal graphite cast iron) forms through casting and machining, by chemical composition requirement of the present invention with L04 pig iron 70kg, vanadium titanium material iron 70kg, vanadium titanium foundry returns 50kg, steel scrap 20kg, copper 1.4kg, iron end 37kg place in the middle frequency furnace respectively, middle frequency furnace casting melting process according to routine requires to operate, and temperature melts in time more than 1600 ℃ and finishes in the control stove; Take by weighing the 1.8kg of magnesium group by the capacity of nodularization bag and place in the nodularization bag as nodulant, pour the molten iron of above-mentioned fusing then into, the time is to get final product in 65 seconds.Described preparation process comprise current-following inoculation, the bag in breed, three processes of mould cavity inoculation, take by weighing the silicon strontium and account for 1.2kg, silicon barium 0.4kg, antimony, tin all measure account for 0.16kg as inovulant and mix mix thoroughly after, breed operation according to inoculation method conventional in the casting process.After this can obtain the piston ring of present embodiment of the present invention according to the processing of technology methods such as the machining that has piston ring now, plating, packing.Chemical analysis is carried out in sampling, and the chemical composition of its piston ring (percetage by weight) is: all the other are iron and inevitable microimpurity carbon 3.0% silicon 2.0% manganese 0.6% sulphur 0.02% phosphorus 0.18% bronze medal 0.5% vanadium 0.15% titanium 0.15% magnesium 0.04%.
Embodiment 9:
A kind of ductile iron piston ring (it is to be matrix with spheroidal graphite cast iron) forms through casting and machining, by chemical composition requirement of the present invention with L04 pig iron 80kg, vanadium titanium material iron 80kg, vanadium titanium foundry returns 55kg, steel scrap 7kg, chromium 1.0kg, iron end 26kg place in the middle frequency furnace respectively, middle frequency furnace casting melting process according to routine requires to operate, and temperature melts in time more than 1600 ℃ and finishes in the control stove; Take by weighing the 1.8kg of magnesium group by the capacity of nodularization bag and place in the nodularization bag as nodulant, pour the molten iron of above-mentioned fusing then into, the time is to get final product in 65 seconds.Described preparation process comprise current-following inoculation, the bag in breed, three processes of mould cavity inoculation, take by weighing the silicon strontium and account for 1.4kg, silicon barium 0.5kg, antimony, tin all measure account for 0.18kg as inovulant and mix mix thoroughly after, breed operation according to inoculation method conventional in the casting process.After this can obtain the piston ring of present embodiment of the present invention according to the processing of technology methods such as the machining that has piston ring now, plating, packing.Chemical analysis is carried out in sampling, and the chemical composition of its piston ring (percetage by weight) is: all the other are iron and inevitable microimpurity carbon 3.5% silicon 2.5% manganese 0.6% sulphur 0.05% phosphorus 0.1% chromium 0.4% vanadium 0.25% titanium 0.20% magnesium 0.03%.
Embodiment 10:
A kind of ductile iron piston ring (it is to be matrix with spheroidal graphite cast iron) forms through casting and machining, by chemical composition requirement of the present invention with L04 pig iron 85kg, vanadium titanium material iron 75kg, vanadium titanium foundry returns 40kg, steel scrap 7.2kg, iron end 39kg place in the middle frequency furnace respectively, middle frequency furnace casting melting process according to routine requires to operate, and temperature melts in time more than 1600 ℃ and finishes in the control stove; Take by weighing respectively by the capacity of nodularization bag and to place respectively in the nodularization bag after T1-B magnesium-rare earth 3.0kg, the 1.8kg of magnesium group mix it as nodulant, pour the molten iron of above-mentioned fusing then into, the time is to get final product in 65 seconds.Described preparation process comprise current-following inoculation, the bag in breed, three processes of mould cavity inoculation, take by weighing the silicon strontium and account for 1.6kg, silicon barium 0.6kg, antimony, tin all measure account for 0.16kg as inovulant and mix mix thoroughly after, breed operation according to inoculation method conventional in the casting process.After this can obtain the piston ring of present embodiment of the present invention according to the processing of technology methods such as the machining that has piston ring now, plating, packing.Chemical analysis is carried out in sampling, and the chemical composition of its piston ring (percetage by weight) is: all the other are iron and inevitable microimpurity carbon 4.0% silicon 3.0% manganese 0.1% sulphur 0.03% phosphorus 0.02% vanadium 0.18% titanium 0.17% rare earth 0.045% magnesium 0.03%.
A kind of ductile iron piston ring of the present invention can be widely used in the internal-combustion engine of various cylinder sleeve bore with the machining in the prior art and technique processing method and manufacture the piston ring of various different size models.Owing to contain V-Ti and other trace element in its piston ring, make the background structure of nodular cast iron refinement, have characteristics such as high-melting-point, high hardness, stability at elevated temperature, make piston ring of the present invention have high wear-resisting property, long period is lost bullet, the obvious improvement such as working life that prolonged piston ring greatly.
Claims (4)
1, a kind of ductile iron piston ring, it is to be that matrix forms through casting and machining with spheroidal graphite cast iron, it is characterized in that containing in this piston ring following chemical composition (percetage by weight): all the other are iron and inevitable microimpurity carbon 2.5-4.5% silicon 1.5-3.5% manganese 0.05-1.0% sulphur 0.01-0.1% phosphorus 0.01-0.3% vanadium 0.1-0.4% titanium 0.05-0.3% magnesium 0.01-0.05%.
2, a kind of ductile iron piston ring according to claim 1 is characterized in that containing in this piston ring following chemical composition (percetage by weight): all the other are iron and inevitable microimpurity carbon 3.0-4.0% silicon 2.0-3.0% manganese 0.1-0.6% sulphur 0.03-0.07% phosphorus 0.05-0.1% vanadium 0.2-0.35% titanium 0.1-0.25% magnesium 0.02-0.04%
3, a kind of ductile iron piston ring according to claim 1 and 2 is characterized in that also containing in this piston ring following at least a chemical composition (percetage by weight):
Copper 0.2-1.2% chromium 0.1-1.0% rare earth 0.01-0.05%.
4, a kind of ductile iron piston ring according to claim 1 and 2 is characterized in that also containing in this piston ring following at least a chemical composition (percetage by weight):
Copper 0.4-1.0% chromium 0.3-0.7% rare earth 0.02-0.04%.
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| CN 200410075401 CN1641248A (en) | 2004-12-07 | 2004-12-07 | Nodular cast iron piston ring |
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| CN 200410075401 CN1641248A (en) | 2004-12-07 | 2004-12-07 | Nodular cast iron piston ring |
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| CN101942540A (en) * | 2010-08-31 | 2011-01-12 | 南京飞燕活塞环股份有限公司 | Novel inoculant for eliminating acicular structures and hardness difference of singly cast piston rings |
| CN102356257A (en) * | 2009-03-26 | 2012-02-15 | 联邦摩高布尔沙伊德公司 | Nitriding grade steel material composition for manufacturing piston rings and cylinder liners |
| CN103451510A (en) * | 2013-08-21 | 2013-12-18 | 石家庄金刚凯源动力科技有限公司 | Manufacturing method of vermicular cast iron piston ring |
| CN104060154A (en) * | 2014-05-28 | 2014-09-24 | 安徽省瑞顺铸造科技有限公司 | QT500 casting and production method thereof |
| CN104060152A (en) * | 2014-05-28 | 2014-09-24 | 安徽省瑞顺铸造科技有限公司 | QT450 casting and production method thereof |
| CN104060151A (en) * | 2014-05-28 | 2014-09-24 | 安徽省瑞顺铸造科技有限公司 | QT600 casting and a production method thereof |
| CN104080931A (en) * | 2011-11-30 | 2014-10-01 | 费德罗-莫格尔公司 | High modulus wear-resistant gray cast iron for piston ring applications |
| CN104073713A (en) * | 2014-07-28 | 2014-10-01 | 宁国市南方耐磨材料有限公司 | Bainite ductile iron grinding ball |
| CN106086609A (en) * | 2016-07-14 | 2016-11-09 | 安徽樵森电气科技股份有限公司 | A kind of spheroidal graphite cast-iron yoke plate |
| CN106244904A (en) * | 2016-07-14 | 2016-12-21 | 安徽樵森电气科技股份有限公司 | A kind of corrosion-resistant prolongation ring |
| CN106435334A (en) * | 2016-08-23 | 2017-02-22 | 宁国市开源电力耐磨材料有限公司 | Smelting technique of as-cast ductile iron |
| CN111549272A (en) * | 2020-05-16 | 2020-08-18 | 江苏金玉龙铁路器材有限公司 | Preparation method of novel nodular cast iron railway turnout fitting |
| CN112111688A (en) * | 2020-09-16 | 2020-12-22 | 河南广瑞汽车部件股份有限公司 | Nodular cast iron capable of effectively reducing shrinkage cavity and shrinkage porosity tendency and production method thereof |
| CN113584374A (en) * | 2021-07-16 | 2021-11-02 | 四川大学 | High-strength and high-wear-resistance vanadium-titanium cast iron brake drum |
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| CN102356257A (en) * | 2009-03-26 | 2012-02-15 | 联邦摩高布尔沙伊德公司 | Nitriding grade steel material composition for manufacturing piston rings and cylinder liners |
| CN102356257B (en) * | 2009-03-26 | 2014-07-30 | 联邦摩高布尔沙伊德公司 | Nitridable piston rings |
| US9650702B2 (en) | 2009-03-26 | 2017-05-16 | Federal-Mogul Burscheid Gmbh | Nitridable piston rings |
| CN101942540A (en) * | 2010-08-31 | 2011-01-12 | 南京飞燕活塞环股份有限公司 | Novel inoculant for eliminating acicular structures and hardness difference of singly cast piston rings |
| US9091345B2 (en) | 2011-11-30 | 2015-07-28 | Federal-Mogul Corporation | High modulus wear resistant gray cast iron for piston ring applications |
| CN104080931B (en) * | 2011-11-30 | 2016-01-20 | 费德罗-莫格尔公司 | For the high-modulus wear resistance grey cast iron of piston ring application |
| CN104080931A (en) * | 2011-11-30 | 2014-10-01 | 费德罗-莫格尔公司 | High modulus wear-resistant gray cast iron for piston ring applications |
| CN103451510A (en) * | 2013-08-21 | 2013-12-18 | 石家庄金刚凯源动力科技有限公司 | Manufacturing method of vermicular cast iron piston ring |
| CN103451510B (en) * | 2013-08-21 | 2015-08-12 | 石家庄金刚凯源动力科技有限公司 | The manufacture method of vermicular cast iron piston ring |
| CN104060152A (en) * | 2014-05-28 | 2014-09-24 | 安徽省瑞顺铸造科技有限公司 | QT450 casting and production method thereof |
| CN104060151A (en) * | 2014-05-28 | 2014-09-24 | 安徽省瑞顺铸造科技有限公司 | QT600 casting and a production method thereof |
| CN104060154A (en) * | 2014-05-28 | 2014-09-24 | 安徽省瑞顺铸造科技有限公司 | QT500 casting and production method thereof |
| CN104073713A (en) * | 2014-07-28 | 2014-10-01 | 宁国市南方耐磨材料有限公司 | Bainite ductile iron grinding ball |
| CN104073713B (en) * | 2014-07-28 | 2016-09-14 | 宁国市南方耐磨材料有限公司 | A kind of bainite ductile iron abrading-ball |
| CN106086609A (en) * | 2016-07-14 | 2016-11-09 | 安徽樵森电气科技股份有限公司 | A kind of spheroidal graphite cast-iron yoke plate |
| CN106244904A (en) * | 2016-07-14 | 2016-12-21 | 安徽樵森电气科技股份有限公司 | A kind of corrosion-resistant prolongation ring |
| CN106435334A (en) * | 2016-08-23 | 2017-02-22 | 宁国市开源电力耐磨材料有限公司 | Smelting technique of as-cast ductile iron |
| CN111549272A (en) * | 2020-05-16 | 2020-08-18 | 江苏金玉龙铁路器材有限公司 | Preparation method of novel nodular cast iron railway turnout fitting |
| CN112111688A (en) * | 2020-09-16 | 2020-12-22 | 河南广瑞汽车部件股份有限公司 | Nodular cast iron capable of effectively reducing shrinkage cavity and shrinkage porosity tendency and production method thereof |
| CN112111688B (en) * | 2020-09-16 | 2021-12-10 | 河南广瑞汽车部件股份有限公司 | Nodular cast iron capable of effectively reducing shrinkage cavity and shrinkage porosity tendency and production method thereof |
| CN113584374A (en) * | 2021-07-16 | 2021-11-02 | 四川大学 | High-strength and high-wear-resistance vanadium-titanium cast iron brake drum |
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