CN105483508A - Alloy vermicular graphite cast iron for railway vehicle brake disc and smelting method of alloy vermicular graphite cast iron - Google Patents
Alloy vermicular graphite cast iron for railway vehicle brake disc and smelting method of alloy vermicular graphite cast iron Download PDFInfo
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- CN105483508A CN105483508A CN201410510550.8A CN201410510550A CN105483508A CN 105483508 A CN105483508 A CN 105483508A CN 201410510550 A CN201410510550 A CN 201410510550A CN 105483508 A CN105483508 A CN 105483508A
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- 229910001018 Cast iron Inorganic materials 0.000 title claims abstract description 52
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 39
- 239000000956 alloy Substances 0.000 title claims abstract description 39
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000010439 graphite Substances 0.000 title abstract description 14
- 229910002804 graphite Inorganic materials 0.000 title abstract description 14
- 238000003723 Smelting Methods 0.000 title abstract 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 85
- 229910001562 pearlite Inorganic materials 0.000 claims abstract description 14
- 229910052742 iron Inorganic materials 0.000 claims description 38
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 24
- 230000000979 retarding effect Effects 0.000 claims description 20
- 239000010949 copper Substances 0.000 claims description 18
- 229910052802 copper Inorganic materials 0.000 claims description 16
- 238000005266 casting Methods 0.000 claims description 15
- 229910052759 nickel Inorganic materials 0.000 claims description 15
- 239000000126 substance Substances 0.000 claims description 15
- 238000002844 melting Methods 0.000 claims description 14
- 230000008018 melting Effects 0.000 claims description 14
- 238000011081 inoculation Methods 0.000 claims description 11
- 239000002667 nucleating agent Substances 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims description 8
- 229910000616 Ferromanganese Inorganic materials 0.000 claims description 7
- 108010038629 Molybdoferredoxin Proteins 0.000 claims description 7
- 229910000805 Pig iron Inorganic materials 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- HBELESVMOSDEOV-UHFFFAOYSA-N [Fe].[Mo] Chemical compound [Fe].[Mo] HBELESVMOSDEOV-UHFFFAOYSA-N 0.000 claims description 7
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 229910052748 manganese Inorganic materials 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims 1
- 238000010079 rubber tapping Methods 0.000 claims 1
- 230000008646 thermal stress Effects 0.000 abstract description 5
- 230000035882 stress Effects 0.000 abstract description 4
- 239000010451 perlite Substances 0.000 description 4
- 235000019362 perlite Nutrition 0.000 description 4
- 229910001060 Gray iron Inorganic materials 0.000 description 3
- 239000012141 concentrate Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 230000000704 physical effect Effects 0.000 description 3
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 229910001567 cementite Inorganic materials 0.000 description 2
- KSOKAHYVTMZFBJ-UHFFFAOYSA-N iron;methane Chemical compound C.[Fe].[Fe].[Fe] KSOKAHYVTMZFBJ-UHFFFAOYSA-N 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- -1 Si:2.38 ~ 2.47% Substances 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
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- Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
Abstract
The invention relates to alloy vermicular graphite cast iron for a railway vehicle brake disc and a smelting method of the alloy vermicular graphite cast iron. The vermicular graphite cast iron is composed of, by mass, 3.3%-3.5% of C, 2.3%-2.5% of Si, 0.4%-0.7% of Mn, 0.6%-1.0% of Cu, 0.2%-0.6% of Mo, 0.6%-1.0% of Ni, 0-0.07% of P, 0-0.02% of S and the balance Fe. The vermicular graphite rate of the vermicular graphite cast iron brake disc is higher than or equal to 75% and the pearlite content is 50% to 60%. According to the alloy vermicular graphite cast iron for the railway vehicle brake disc and the smelting method of the alloy vermicular graphite cast iron, the stress threshold value when a disc body is cracked and extended due to thermal stress concentration can be increased, and the mechanical property of the railway vehicle brake disc is improved.
Description
Technical field
The present invention relates to a kind of brake disc for railway vehicle alloy vermicular cast iron and melting method thereof, belong to alloy vermicular cast iron technical field.
Background technology
Current rail truck breaking system just extensively adopts retarding disc mode of braking, this mode of braking in braking procedure more than 90% heat be braked dish absorbed, therefore during car brakeing, retarding disc can experience at short notice and to be rapidly heated and strong convection temperature-fall period, and this must cause retarding disc will bear very high thermal load and thermal stresses in braking procedure.Therefore brake disc of rail transit vehicle material must have good mechanical behavior under high temperature, thermal fatigue resistance, stable heat resistance and certain resistance of oxidation.
Traditional brake disc for railway vehicle is generally cast by grey cast iron and is formed, and grey cast iron has high thermal conductivity, and the features such as good damping property and frictional behaviour, meet the use needs of domestic railway retarding disc to a certain extent within for some time.But the poor toughness of grey cast iron, unit elongation is low, easily causes retarding disc to crack, and then causes brake system to break down, and even causes security incident.In order to improve the physicals of cast iron brake disk, mostly adopt the alloyage process comprehensively adding the elements such as Cu, Cr, Ni, Mo at present, this compacted black cast alloy iron enhances the mechanical property of retarding disc, extends the life-span of retarding disc.But along with progressively starting the speed-increase train of 160km/h in a large number, retarding disc Working environment is more severe, retarding disc cracks due to heat cold replacing during work and the tendency expanded strengthens further, and can not meet service requirements.
Summary of the invention
The object of this invention is to provide a kind of can raising because thermal stresses concentrates the stress threshold causing disk body to ftracture and expand, improve the brake disc for railway vehicle alloy vermicular cast iron of mechanical property.
The present invention is the technical scheme achieved the above object: a kind of brake disc for railway vehicle alloy vermicular cast iron, it is characterized in that, the chemical constitution of described vermicular cast iron, by percentage to the quality, comprise: C:3.3 ~ 3.5%, Si:2.3 ~ 2.5%, Mn:0.4 ~ 0.7%, Cu:0.6 ~ 1.0%, Mo:0.2 ~ 0.6%, Ni:0.6 ~ 1.0%, P≤0.07%, S≤0.02%, and the Fe of surplus, wherein, nodulizing rate >=75% of vermicular cast iron retarding disc, content of pearlite in alloy is 50% ~ 60%.
Brake disc for railway vehicle alloy vermicular cast iron of the present invention and melting method thereof, is characterized in that:
(1), furnace charge preparation: take the pig iron of aequum, steel scrap, foundry returns, high carbon ferromanganese, electrolytic copper, molybdenum-iron and nickel plate by the chemical constitution of vermicular cast iron retarding disc;
(2), melting: the pig iron, steel scrap, foundry returns, high carbon ferromanganese, electrolytic copper and molybdenum-iron and nickel plate are added in induction furnace and carry out melting, the insulation carrying out being no more than 30 minutes when in-furnace temperature to 1480 ± 10 DEG C is also come out of the stove, between soak with deslagging agent to molten iron drossing, then molten iron is come out of the stove and molten iron is poured into compactedization bag;
(3), the method of pouring carries out compactedization inoculation: dig pit at the bottom of the bag of compactedization bag, and insert vermiculizer in order from bottom to up, nucleating agent and siliconized plate, by mass percentage, insert the vermiculizer of 0.5 ~ 0.9% of molten iron total amount, the nucleating agent of 0.6 ~ 1.0% and the siliconized plate of 0.4 ~ 0.6%, wherein, the chemical constitution of described vermiculizer, by percentage to the quality, Mg:4 ~ 7%, Ca:< 3%, RE:7 ~ 12%, Si:40 ~ 46%, the Fe of Al:< 1% and surplus, molten iron is poured in compactedization bag and carry out compactedization inoculation,
(4), cast and isothermal holding: the molten iron after compactedization inoculation is stirred and skims, when molten iron temperature is to teeming temperature 1360-1420 DEG C, molten iron is cast in casting mold, molten iron casting time in compactedization bag controls within 10 minutes, after cast terminates, treat that casting mold naturally cools to temperature≤300 DEG C, casting mold is unpacked peeling, obtained vermicular cast iron casting parts.
Alloy vermicular cast iron of the present invention is ensureing that iron liquid fundamental element mass percentage is at C::3.3 ~ 3.5%, the basis of Si:2.3 ~ 2.5% adds the alloying element that mass percentage is respectively Cu:0.6 ~ 1.0%, Mo:0.2 ~ 0.6%, Ni:0.6 ~ 1.0%, the quasiflake graphite of separating out is caused to increase to increase, reduce shrinkage cavity shrinkage porosity tendency, and increase tensile strength, yield strength and hardness, physicals and the physicals of retarding disc can be effectively raised.And by increasing Mo simultaneously in alloy vermicular cast iron, Cu and Ni element energy refine pearlite, and the content of pearlite in alloy effectively increased in foundry goods matrix, to improve the intensity of foundry goods, chilling tendency can also be reduced particularly by Cu element, improve intensity, hardness and wear resistance, the sensitivity profile of cast iron can be reduced, the heat resistance of retarding disc can be improved by Mo element, and improve the yield tensile ratio of foundry goods, homogeneity in foundry goods matrix can be improved by Ni element, can improve because thermal stresses concentrates the stress threshold causing disk body to ftracture and expand, the mechanical property of the retarding disc obtained can reach technical qualification requirement, nodulizing rate is all greater than 75%.The present invention adds average tensile strength after Ni alloy than the high 100MPa not adding Ni alloy under the same terms, and average elongation is high by 0.4%, and matrix perlite average content exceeds 10%, and hardness mean value exceeds 20HB.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiments of the invention are described in further detail.
Fig. 1 is the metallographic structure figure with test block Medium pearlite content 60% obtained in alloy vermicular cast iron alloyage process embodiment 1 of the present invention.
Fig. 2 is the metallographic structure figure with nodulizing rate 85% in test block obtained in alloy vermicular cast iron alloyage process embodiment 1 of the present invention.
Fig. 3 is the metallographic structure figure with test block Medium pearlite content 55% obtained in alloy vermicular cast iron alloyage process embodiment 2 of the present invention.
Fig. 4 is the metallographic structure figure with nodulizing rate 75% in test block obtained in alloy vermicular cast iron alloyage process embodiment 2 of the present invention.
There is embodiment
A kind of brake disc for railway vehicle alloy vermicular cast iron of the present invention, the chemical constitution of this vermicular cast iron, by percentage to the quality, comprise: C::3.3 ~ 3.5%, Si:2.3 ~ 2.5%, Mn:0.4 ~ 0.7%, Cu:0.6 ~ 1.0%, Mo:0.2 ~ 0.6%, Ni:0.6 ~ 1.0%, P≤0.07%, S≤0.02%, and the Fe of surplus, wherein, nodulizing rate >=75% of vermicular cast iron retarding disc, content of pearlite in alloy is 50% ~ 60%.
C content designs 3.3 ~ 3.5% by the present invention, by controlling carbon content, can increase and cause the quasiflake graphite of separating out to increase, shrinkage cavity shrinkage porosity tendency can be reduced, also solve the graphite that the tensile strength due to cast iron can cause because of carbon content increase to increase, perlite reduces the problem declined to some extent simultaneously.Si content designs 2.3 ~ 2.5% by the present invention, can increase while can reducing pearlitic content, reinforced ferrite, and the trend having graphite to increase, increase tensile strength, yield strength and hardness, also solve the problem that plasticity index can decrease.The design of Mn content 0.4 ~ 0.7%, with stabilizing pearlite content, and is increased intensity and the hardness increase of foundry goods, also solves because Mn too much produces more cementite tissue by the present invention.The present invention increases Mn content in the formula system of alloy vermicular cast iron, reduces again the content of Si simultaneously, is being conducive to pearlitic increasing, and solves the problem of cementite and the increase of foundry goods chilling tendency by increasing alloying element.The present invention is in the formula system of alloy vermicular cast iron, by copper content control 0.6 ~ 1.0%, increase and refine pearlite, reduce chilling tendency, improve intensity, hardness and wear resistance, so that the sensitivity profile of cast iron can be reduced, Mo designs 0.2 ~ 0.6% by the present invention, while increase also refine pearlite, improve intensity, wear resistance and thermotolerance, Mo can improve the heat resistance of retarding disc, improve the yield tensile ratio of foundry goods, especially the cooperation of Cu and Mo, use and can organize content of pearlite in alloy giving full play to alloy raising, carbide is avoided to be formed while improving intensity and hardness effect.Ni can improve the homogeneity of foundry goods, crystal grain thinning and graphite size, contributes to the decomposition of carbide, improves the impelling strength of vermicular cast iron.Alloy vermicular cast iron of the present invention, mass percentage preferably C::3.35 ~ 3.47% of its chemical composition, Si:2.38 ~ 2.47%, Mn:0.47 ~ 0.64%, Cu:0.7 ~ 0.88%, Mo:0.36 ~ 0.51%, Ni:0.62 ~ 0.91%, P≤0.05%, S≤0.02%, and the iron of surplus.The chemical constitution of brake disc for railway vehicle alloy vermicular cast iron of the present invention, by percentage to the quality, is specifically shown in Table 1,
Table 1
Brake disc for railway vehicle alloy vermicular cast iron of the present invention and melting method thereof,
(1), furnace charge preparation: take the pig iron of aequum, steel scrap, foundry returns, high carbon ferromanganese, electrolytic copper, molybdenum-iron and nickel plate by the chemical constitution of vermicular cast iron retarding disc;
Furnace charge of the present invention by mass percentage, when containing the Si at C and 0.67%-0.83% of 4.57%-4.69% in the Q10 pig iron, its add-on can be controlled in 40-75%, when containing C, 0.13%-0.19% and Si of 0.12%-0.17% and the Mn of 0.40%-0.51% in steel scrap, its add-on can be controlled in 10-20%, and foundry returns, high carbon ferromanganese, electrolytic copper, molybdenum-iron and nickel plate suitably add according to molten iron target component;
Concrete furnace charge of the present invention is shown in Table 2 by mass percentage,
Table 2
(2), melting: the pig iron, steel scrap, foundry returns, high carbon ferromanganese, electrolytic copper and molybdenum-iron and nickel plate are added in induction furnace and carry out melting, the insulation carrying out being no more than 30 minutes when in-furnace temperature to 1480 ± 10 DEG C is also come out of the stove, with deslagging agent to molten iron drossing, perlite matter deslagging agent can be adopted to carry out poly-slag and slagging-off, and then molten iron is come out of the stove and molten iron is poured into compactedization bag;
(3) the method that, pours carries out compactedization inoculation: dig pit at the bottom of the bag of compactedization bag, and insert vermiculizer in order from bottom to up, nucleating agent and siliconized plate, by mass percentage, insert the vermiculizer of the 0.5-0.9% of molten iron total amount, the nucleating agent of 0.6 ~ 1.0% and 0.4 ~ 0.6% siliconized plate, concrete component is shown in Table 3
Table 3
Wherein, the chemical constitution of vermiculizer of the present invention, by percentage to the quality, Mg:4 ~ 7%, Ca:< 3%, RE:7 ~ 12%, Si:40 ~ 46% and Al:< 1%, and the Fe of surplus, preferably the chemical constitution of vermiculizer is controlled at Mg:4.4 ~ 6.45%, the Fe of Ca:< 2.5%, RE:7.5 ~ 11.2%, Si:41.5 ~ 45.5% and Al:< 0.9% and surplus.Molten iron is carried out compactedization inoculation in compactedization bag, and concrete chemical constitution is shown in Table 4,
Table 4
(4), cast and isothermal holding: the molten iron surface after compactedization inoculation is stirred and skimmed, when molten iron temperature is to teeming temperature 1360-1420 DEG C, molten iron is cast in casting mold, molten iron casting time in compactedization bag is within 10 minutes, in the present invention's compactedization bag, molten iron goes out to the greatest extent at twice, tap a blast furnace for twice gap again to compactedization bag in put into nucleating agent, when second time molten iron discharging, the stirring action of molten iron in compactedization bag is melted to vermiculizer thus carries out late inoculation, after cast terminates, treat that casting mold naturally cools to temperature≤300 DEG C, casting mold is unpacked peeling, obtained vermicular cast iron casting parts, the control temperature that the present invention is concrete and time are shown in Table 5,
Table 5
The vermicular cast iron test block adopting embodiments of the invention 1 and the 2-in-1 golden method of embodiment to obtain is 220 × 25Y type, and obtain Fig. 1, the 2 metallographic structure figures of test block as can be seen from amplification 100 times by embodiment 1, content of pearlite in alloy reaches 60%, nodulizing rate 85%.Test block is obtained as can be seen from the metallographic structure figure in large 100 times of Fig. 3,4 by embodiment 2, content of pearlite in alloy reaches 55%, nodulizing rate 75%, the standard of tensile strength of the present invention and elongation after fracture is that GB/T228.1-2010 " metal material stretching test part 1: room temperature test method " tests; Perlite and hardness and nodulizing rate JB/T3829-1999 " vermicular cast iron metallographic examination " and GB/T231.1-2009 " metal static hardness test first part: test method " test, and specific performance of the present invention is shown in Table 6,
Table 6
The vermicular cast iron that the present invention obtains can improve because thermal stresses concentrates the stress threshold causing disk body to ftracture and expand, and meets the technical qualification requirement of the mechanical property of retarding disc.
Claims (6)
1. a brake disc for railway vehicle alloy vermicular cast iron, is characterized in that, the chemical constitution of described vermicular cast iron, by percentage to the quality, comprising: C:3.3 ~ 3.5%, Si:2.3 ~ 2.5%, Mn:0.4 ~ 0.7%, Cu:0.6 ~ 1.0%, Mo:0.2 ~ 0.6%, Ni:0.6 ~ 1.0%, P≤0.07%, S≤0.02%, and the Fe of surplus, wherein, nodulizing rate >=75% of vermicular cast iron retarding disc, content of pearlite in alloy is 50% ~ 60%.
2. brake disc for railway vehicle alloy vermicular cast iron according to claim 1, it is characterized in that, the mass percentage of its chemical composition comprises: C::3.35 ~ 3.47%, Si:2.38 ~ 2.47%, Mn:0.47 ~ 0.64%, Cu:0.7 ~ 0.88%, Mo:0.36 ~ 0.51%, Ni:0.62 ~ 0.91%, P≤0.05%, S≤0.02%, and the iron of surplus.
3. brake disc for railway vehicle alloy vermicular cast iron according to claim 1 and 2 and melting method thereof, is characterized in that:
(1), furnace charge preparation: take the pig iron of aequum, steel scrap, foundry returns, high carbon ferromanganese, electrolytic copper, molybdenum-iron and nickel plate by the chemical constitution of vermicular cast iron retarding disc;
(2), melting: the pig iron, steel scrap, foundry returns, high carbon ferromanganese, electrolytic copper and molybdenum-iron and nickel plate are added in induction furnace and carry out melting, the insulation carrying out being no more than 30 minutes when in-furnace temperature to 1480 ± 10 DEG C is also come out of the stove, between soak with deslagging agent to molten iron drossing, then molten iron is come out of the stove and molten iron is poured into compactedization bag;
(3), the method of pouring carries out compactedization inoculation: dig pit at the bottom of the bag of compactedization bag, and insert vermiculizer in order from bottom to up, nucleating agent and siliconized plate, by mass percentage, insert the vermiculizer of 0.5 ~ 0.9% of molten iron total amount, the nucleating agent of 0.6 ~ 1.0% and the siliconized plate of 0.4 ~ 0.6%, wherein, the chemical constitution of described vermiculizer, by percentage to the quality, Mg:4 ~ 7%, Ca:< 3%, RE:7 ~ 12%, Si:40 ~ 46%, the Fe of Al:< 1% and surplus, molten iron is poured in compactedization bag and carry out compactedization inoculation,
(4), cast and isothermal holding: the molten iron after compactedization inoculation is stirred and skims, when molten iron temperature is to teeming temperature 1360-1420 DEG C, molten iron is cast in casting mold, molten iron casting time in compactedization bag controls within 10 minutes, after cast terminates, treat that casting mold naturally cools to temperature≤300 DEG C, casting mold is unpacked peeling, obtained vermicular cast iron casting parts.
4. brake disc for railway vehicle alloy vermicular cast iron according to claim 3 and melting method thereof, it is characterized in that: by percentage to the quality, chemical constitution Mg:4.4 ~ 6.45% of vermiculizer, Ca:< 2.5%, RE:7.5 ~ 11.2%, the Fe of Si:41.5 ~ 45.5% and Al:< 0.9% and surplus.
5. brake disc for railway vehicle alloy vermicular cast iron according to claim 3 and melting method thereof, is characterized in that: FeSi75 nucleating agent selected by the nucleating agent in described step 3.
6. brake disc for railway vehicle alloy vermicular cast iron according to claim 3 and melting method thereof, it is characterized in that: in compactedization bag, molten iron goes out to the greatest extent at twice, nucleating agent is put into again in gap of tapping a blast furnace for twice in compactedization bag, melts vermiculizer thus carry out late inoculation when second time molten iron discharging to the stirring action of molten iron in compactedization bag.
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| CN201410510550.8A CN105483508B (en) | 2014-09-29 | 2014-09-29 | Brake disc for railway vehicle alloy vermicular cast iron and its method of smelting |
| PCT/CN2015/091062 WO2016050200A2 (en) | 2014-09-29 | 2015-09-29 | Compacted graphite iron alloy, rail vehicle brake disk and casting method |
| CN201580049347.8A CN107002188A (en) | 2014-09-29 | 2015-09-29 | Alloy vermicular cast iron, rail vehicle brake disc and casting method |
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| CN201410510550.8A CN105483508B (en) | 2014-09-29 | 2014-09-29 | Brake disc for railway vehicle alloy vermicular cast iron and its method of smelting |
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| CN106011603A (en) * | 2016-07-01 | 2016-10-12 | 宁国市开源电力耐磨材料有限公司 | Smelting technology of high-strength vermicular graphite cast iron |
| CN105970075A (en) * | 2016-07-15 | 2016-09-28 | 江苏汽铸造股份有限公司 | Technique for preparing vermicular cast iron material |
| CN106048402A (en) * | 2016-08-17 | 2016-10-26 | 河南理工大学 | Thermal-fatigue-resisting vermicular graphite cast iron, pig mold and preparing method of cast iron |
| CN108624807B (en) * | 2017-08-29 | 2019-12-17 | 西安工业大学 | Cast high-pearlite high-creep-rate vermicular graphite cast iron and preparation method thereof |
| CN108624807A (en) * | 2017-08-29 | 2018-10-09 | 西安工业大学 | A kind of high nodulizing rate vermicular cast iron of the high either pearlite occurred of as cast condition and preparation method thereof |
| CN108060284A (en) * | 2017-12-20 | 2018-05-22 | 山西东方恒略精密铸造有限公司襄汾新盛分公司 | A kind of vermicular cast iron creepage rate method |
| CN109371316A (en) * | 2018-12-20 | 2019-02-22 | 苏州石川制铁有限公司 | A kind of preparation method of compactedization casting |
| CN110982977A (en) * | 2019-12-23 | 2020-04-10 | 山东时风（集团）有限责任公司 | Preparation method of vermicular graphite cast iron automobile exhaust manifold |
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| CN110904381A (en) * | 2019-12-30 | 2020-03-24 | 江西久旺汽车配件制造有限公司 | Vermicular graphite cast iron material and preparation method and application thereof |
| CN113337777A (en) * | 2020-03-02 | 2021-09-03 | 常州中车柴油机零部件有限公司 | Vermicular graphite cast iron, piston ring, preparation method and application thereof |
| CN111690868A (en) * | 2020-05-19 | 2020-09-22 | 赵纪明 | Isothermal quenching vermicular graphite cast iron and preparation method thereof |
| CN112210711A (en) * | 2020-10-12 | 2021-01-12 | 朝阳飞马车辆设备股份公司 | Multi-alloy TMM-R-01 brake disc material, preparation method and application thereof |
| CN113832382A (en) * | 2021-09-14 | 2021-12-24 | 汶上海纬机车配件有限公司 | Preparation method for graphite refining of vermicular graphite cast iron |
| CN114318119A (en) * | 2021-11-29 | 2022-04-12 | 四川共享铸造有限公司 | High-strength vermicular graphite cast iron and production method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2016050200A3 (en) | 2016-05-26 |
| WO2016050200A2 (en) | 2016-04-07 |
| CN107002188A (en) | 2017-08-01 |
| CN105483508B (en) | 2018-03-13 |
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