CN100491572C - Manufacture method for front brake disc cast for use in car - Google Patents
Manufacture method for front brake disc cast for use in car Download PDFInfo
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- CN100491572C CN100491572C CNB2005100957733A CN200510095773A CN100491572C CN 100491572 C CN100491572 C CN 100491572C CN B2005100957733 A CNB2005100957733 A CN B2005100957733A CN 200510095773 A CN200510095773 A CN 200510095773A CN 100491572 C CN100491572 C CN 100491572C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention discloses a front-braking disc cast of car and making method, which comprises the following parts: 3.6-3.8% C,1.7-1.9% Si,0.56-0.76% Mn,0.14-0.18% chromium,0.53-0.61% Cu, 0.30-0.36% Mo,0.01-0.08% Ni and Fe.
Description
Technical field
The present invention relates to a kind of making method of metallic substance, especially a kind of making method of trolley part, the making method of a kind of front brake disc cast for use in car of more specifically saying so.
Background technology
Retarding disc at first sees on the external automobile, sees with regard to the method for its use, belongs to the category of the friction type stopper, promptly is to make the kinetic energy of vehicle convert heat to by friction, is dispersed into a kind of device that goes in the atmosphere again.Compare with traditional drum-type scatterer, its perfect heat-dissipating is suitable for running at high speed, and foot-operated power is had linear effects.Therefore, obtained part in China in recent years and adopted, represented a kind of trend, comprised the load-carrying lorry from now on, will have vehicle over half to use disc brake is retarding disc.Retarding disc is as a kind of consumable accessory, security personnel's part, and its structure and material are vital to use properties, the safety performance of automobile.Structure Design is the vapour retarding disc as a kind of consumable accessory, security personnel's part, and its structure and material have all been proposed very high requirement, especially material.
Present front brake disc cast for use in car or with graphitic cast iron or with vermicular cast iron or use aluminium alloy, but from cost consideration, still use graphitic cast iron as main raw material mostly, reason is the big alloying element Mn (manganese) of five in the graphitic cast iron, Cr (chromium), Cu (copper), Sn (tin), Mo (molybdenum) can promote perlite to generate, the adding of these alloying elements simultaneously, to a certain degree also can refinement graphite, make ferritic amount minimizing even disappearance in the matrix, perlite then obtains refinement on certain degree, and ferrite wherein is owing to there being a certain amount of alloying element to obtain solution strengthening, make cast iron that higher strength property always be arranged, and this is just meeting the front brake disc cast for use in car service requirements.The above prerequisite of good retarding disc foundry goods just, and around this main raw material rationally adjust the proportioning of each alloying element and reasonably technology be only core.
Understand according to the applicant, Volkswagen's wheel hub casts requires the TL-VW048A standard to be:
C (carbon) 〉=3.6, Si (silicon) 〉=1.6, Mn (manganese) 0.4-0.8, P (phosphorus)≤0.10, S (sulphur)≤0.10, Cu≤0.6, Cr≤0.20, Mo≤0.60, Ni≤0.20 can produce various automotive hubs in view of the above, but in actual production, the control accuracy of each composition requires very high, small composition difference all can produce very big influence to end properties, even causes product defective.And consider that from low cost each composition all will consider simultaneously performance is had very high requirement again from lower bound, so require composition control more accurate; In addition, as front brake disc cast for use in car, require to have high carbon and silicon equivalent, high content of pearlite in alloy, tensile strength, wedge pressure degree, Brinell hardness then can raise with the rising of content of pearlite in alloy simultaneously with it, cause cast properties to reduce, and be even unqualified.
Retrieve discovery according to the applicant, " material technology " P21-22, Li Cunke, mention mechanical property and the Chemical Composition of RuT380 in auspicious auspicious work the in room " research of the bullet train Special Casting Iron retarding disc casting technique " literary composition: Chemical Composition C (carbon) 3.6-3.8, Si (silicon) 2.2-3.0, Mn0.4-1.0, P (phosphorus)≤0.07, S (sulphur)≤0.05, Cu0.4-0.9, Mo0.26-0.3, Ti (titanium) 0.1-0.2, Mg (magnesium) 0.01-0.05, Re (rare earth) 0.01-0.035, this product is the Special Casting Iron retarding disc of using as bullet train, increased titanium, magnesium and rare earth element, the cost height, nor be suitable on car, using.
Summary of the invention
At above-mentioned existing problems, the invention provides a kind of front brake disc cast for use in car, break through traditional casting performance interface, when high carbon and silicon equivalent, keep high content of pearlite in alloy; The mechanical property (tensile strength, wedge pressure degree, Brinell hardness) of the while foundry goods not rising with content of pearlite in alloy raises, but control within the specific limits.
In order to reach above purpose, the present invention by the following technical solutions, front brake disc cast for use in car of the present invention is to be made by each material component of following weight percent, each component in its proportioning of chemical pure content is: carbon 3.6-3.8%, silicon 1.7-1.9%, manganese 0.56-0.76%, chromium 0.14-0.18%, copper 0.53-0.61%, molybdenum 0.30-0.36%, nickel 0.01-0.08%, all the other are iron.
The raw material of described silicon component is a ferrosilicon, and the raw material of described manganese component is a ferromanganese, and the raw material of described molybdenum component is a molybdenum-iron, and the raw material of described copper component is an electrolytic copper, and the raw material of described carbon and chromium component is a low-carbon (LC) chromium, the raw material nickel plate of described nickel component.
The making method of front brake disc cast for use in car of the present invention, key step comprise batching, melting, composition adjustment, inoculation, casting and insulation, and concrete steps are as follows:
A, batching: by design requirements, strict chemical pure content and the actual amount of calculating each component, and weighing is stand-by;
B, melting: load weighted manganese, molybdenum, copper, chromium and nickel component raw material are added furnace bottom, the new pig iron of disposable then adding and steel scrap, then with the heating of 750kg medium-frequency induction furnace, power progressively is increased to 350KW from 220KW, old iron progressively adds, the maintenance induction furnace is completely expected, till the stand-by old iron charge of weighing all adds, adds ferrosilicon insulation to whole furnace charge fusings then and finishes; In fusion process, to carry out quick on-the-spot sample analysis and composition adjustment, promptly in fusion process, get the quick on-the-spot sample analysis of molten iron, measure carbon equivalent, the method of calculation of carbon equivalent are: carbon equivalent ce=C+ (1/3) * Si, wherein C is the chemical pure percentage composition number of silicon in the batching for chemical pure percentage composition number, the Si of carbon in the batching, and the control carbon and silicon equivalent is 4.2～4.4; Generally adding fashionablely at furnace charge, having a mind to control add-on, staying a spot of new pig iron, when carbon equivalent is lower than 4.2, adding the pig iron, causing the carbon equivalent height then uncontrollable else if according to measurement result;
D, inoculation: after all the furnace charges fusing finished, temperature remained on 1480-1520 ℃, and the silicon titanate innoculant that adds weight of molten iron 0.4-0.5% simultaneously carries out inoculation, and silicon titanate innoculant is preferred block or granular;
E, remove slag: after the inoculation, continue to heat, insulation makes the overheated 2-3 of molten iron minute when furnace temperature reaches 1510-1530 ℃, adds the poly-slag agent and the agent of removing slag and removes slag;
F, casting and late inoculation are handled: the molten iron after removing slag goes into to adopt the casting of low temperature teeming practice in the die box, pouring temperature 1330-1360 ℃, the 0.10-0.15% silicon titanate innoculant that adds weight of molten iron before the casting carries out late inoculation and handles the preferred powdery of silicon titanate innoculant;
G, insulation: after casting is finished, seal natural thermal insulation at least 3 hours, unpack then, get blank at die box.
Because the present invention has adopted above technical scheme, so front brake disc cast for use in car that the present invention did, by rational selection and proportioning, overcome the contradiction of high carbon and silicon equivalent and high content of pearlite in alloy, make and when high content of pearlite in alloy, have high carbon and silicon equivalent simultaneously, the mechanical property (tensile strength, wedge pressure degree, Brinell hardness) of the while foundry goods not rising with content of pearlite in alloy raises, but controls (tensile strength 180-230N/mm within the specific limits
2, wedge pressure degree 126-156N/mm
2, Brinell hardness 150-195HB)); Carry out reasonable process again and handle,, make product have good wear resistance, damping property, compactness and antifatigue, anti-oxidant, the long performance of antibiosis as the selection of nucleating agent and the control of pouring temperature etc.; Front brake disc cast for use in car cost of the present invention in addition is also lower, and making method and technology are rationally simple and convenient, and economic benefit is obvious.
Embodiment
The invention will be further described below in conjunction with embodiment, but the present invention not merely is defined in these embodiment.
Embodiment one
A kind of front brake disc cast for use in car of the present invention, its each material component is in chemical pure content, the proportioning of each component weight percent is: carbon 3.6%, silicon 1.9%, manganese 0.56%, chromium 0.14%, copper 0.53%, molybdenum 0.36%, nickel 0.01%, all the other are iron, and the component raw material is ferromanganese, molybdenum-iron, electrolytic copper, low-carbon (LC) chromium, nickel plate, the new pig iron, old iron (foundry returns) and steel scrap.
Above-mentioned a kind of front brake disc cast for use in car, its making method is:
A, batching: by above-mentioned design requirements, at first measure the chemical constitution and the percentage composition of each desired raw material, then according to the deal of chemical pure cubage desired raw material, and weighing is stand-by;
B, melting: load weighted ferromanganese, molybdenum-iron, electrolytic copper, low-carbon (LC) chromium and nickel plate are added furnace bottom, then with the heating of 750kg medium-frequency induction furnace, power progressively is increased to 350KW from 220KW, the heating back adds the new pig iron, old iron (foundry returns) and steel scrap, the adding method is: the new pig iron and the disposable adding of steel scrap, and old iron progressively adds, and keeps induction furnace completely to expect, till the stand-by old iron charge of weighing all adds, add ferrosilicon insulation to whole furnace charge fusings then and finish; Carry out quick on-the-spot sample analysis simultaneously, the composition adjustment: in fusion process, get the quick on-the-spot sample analysis of molten iron, recording carbon and silicon equivalent is 4.3;
C, inoculation: after all the furnace charges fusing finished, temperature remained on 1480 ℃, and 0.4% silicon titanate innoculant (bulk) (BS-IA type, Wuxi Yongxin alloy ball ironworks provides) that adds weight of molten iron simultaneously carries out inoculation;
D, remove slag: after the inoculation, continue to heat, insulation when furnace temperature reaches 1510 ℃, make molten iron overheated 2 minutes, add the poly-slag agent of cast iron (No. 1, the poly-slag agent of cast iron, order is several 8, specification 5mm, Ezhou, Hubei Province China imperial cast material company limited) and the agent of removing slag (natural granule pumice カ ガ ラ ィ ト, Japanese カ ガ ラ ィ ト Industrial Co., Ltd provides) remove slag;
E, casting and late inoculation are handled: adopt the low temperature teeming practice, and 1330 ℃ of pouring temperatures, 0.1% silicon titanate innoculant (powdery) (BS-IA type, Wuxi Yongxin alloy ball ironworks provides) that adds weight of molten iron before the casting carries out late inoculation to be handled;
F, insulation: after casting is finished, seal natural thermal insulation 3 hours at die box, unpack then, get blank, measurement result sees Table 1.
Embodiment two
With a kind of front brake disc cast for use in car of embodiment one, its difference is that the weight percent of each component is: carbon 3.7%, and silicon 1.8%, manganese 0.76%, chromium 0.16%, copper 0.57%, molybdenum 0.33%, nickel 0.04%, all the other are iron.
Its making method is with embodiment one, and difference is:
Insulation when furnace temperature reaches 1520 ℃ when removing slag makes molten iron add poly-slag agent again after overheated 2 minutes and the agent of removing slag is removed slag;
The temperature of molten iron is 1500 ℃ during inoculation, and the add-on of silicon titanate innoculant is 0.45% of a weight of molten iron;
Casting and late inoculation are handled: adopt the low temperature teeming practice, and 1340 ℃ of pouring temperatures, 0.12% silicon titanate innoculant that adds weight of molten iron before the casting carries out late inoculation to be handled;
Insulation: after casting is finished, seal natural thermal insulation 4 hours at die box, unpack then, get blank, measurement result sees Table 1.
Embodiment three
With a kind of front brake disc cast for use in car of embodiment one, difference is that the weight percent of each component is: carbon 3.8%, and silicon 1.7%, manganese 0.66%, chromium 0.18%, copper 0.60%, molybdenum 0.30%, nickel 0.08%, all the other are iron.
Its making method is with embodiment one, and difference is:
Insulation when furnace temperature reaches 1530 ℃ when removing slag makes molten iron add poly-slag agent again after overheated 3 minutes and the agent of removing slag is removed slag;
The temperature of molten iron is 1520 ℃ during inoculation, and the silicon titanate innoculant add-on is 0.50% of a weight of molten iron;
Casting and late inoculation are handled: adopt the low temperature teeming practice, and 1360 ℃ of pouring temperatures, 0.15% silicon titanate innoculant that adds weight of molten iron before the casting carries out late inoculation to be handled;
Insulation: after casting is finished, seal natural thermal insulation 5 hours at die box, unpack then, get blank, measurement result sees Table 1.
Table 1: test result
| Test event | Embodiment one | Embodiment two | Embodiment three |
| Tensile strength N/mm 2 | 198 | 203 | 210 |
| Wedge pressure degree N/mm 2 | 136 | 140 | 145 |
| Brinell hardness HB | 175 | 182 | 178 |
In addition to the implementation, the present invention can also have other embodiments.All employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop on the protection domain of requirement of the present invention.
Claims (4)
1, a kind of making method of front brake disc cast for use in car, front brake disc cast for use in car is made by each material component of following weight percent, each component in its proportioning of chemical pure content is: carbon 3.6-3.8%, silicon 1.7-1.9%, manganese 0.56-0.76%, chromium 0.14-0.18%, copper 0.53-0.61%, molybdenum 0.30-0.36%, nickel 0.01-0.08%, all the other are iron, the raw material of silicon component is a ferrosilicon, the raw material of manganese component is a ferromanganese, and the raw material of molybdenum component is a molybdenum-iron, and the raw material of copper component is an electrolytic copper, the raw material of carbon and chromium component is a low-carbon (LC) chromium, the raw material of nickel component is the nickel plate, and key step comprises batching, melting, composition is adjusted, inoculation, casting and insulation is characterized in that:
A, batching: by design requirements, strict chemical pure content and the actual amount of calculating each component, and weighing is stand-by;
B, melting: load weighted manganese, molybdenum, copper, chromium and nickel component raw material are added furnace bottom, the new pig iron of property adding and steel scrap again, then with the heating of 750kg medium-frequency induction furnace, power progressively is increased to 350KW from 220KW, the heating back new pig iron of disposable adding and steel scrap, old iron progressively adds, and keeps induction furnace completely to expect, till the stand-by old iron charge of weighing all adds, add ferrosilicon insulation to whole furnace charge fusings then and finish;
C, inoculation: after all the furnace charges fusing finished, temperature remained on 1480-1520 ℃, and the silicon titanate innoculant that adds weight of molten iron 0.4-0.5% simultaneously carries out inoculation;
D, remove slag: after the inoculation, continue to heat, insulation makes the overheated 2-3 of molten iron minute when furnace temperature reaches 1510-1530 ℃, adds the poly-slag agent and the agent of removing slag and removes slag;
E, casting and late inoculation are handled: the molten iron after removing slag goes into to adopt the casting of low temperature teeming practice in the die box, and pouring temperature 1330-1360 ℃, the 0.10-0.15% silicon titanate innoculant that adds weight of molten iron before the casting carries out late inoculation to be handled;
F, insulation: after casting is finished, seal natural thermal insulation at least 3 hours, unpack then, get blank at die box.
2, front brake disc cast for use in car making method according to claim 1 is characterized in that the silicon titanate innoculant described in the step c is for block or granular.
3, front brake disc cast for use in car making method according to claim 1, it is characterized in that to carry out quick on-the-spot sample analysis in the described fusion process of step b and carrying out the composition adjustment, promptly in fusion process, get the quick on-the-spot sample analysis of molten iron, measure carbon and silicon equivalent, adjust carbon silicon component content according to measurement result, the control carbon and silicon equivalent is 4.2～4.4.
4, front brake disc cast for use in car making method according to claim 1 is characterized in that step is as follows:
A, batching: its each material component is in chemical pure content, the proportioning of each component weight percent is: carbon 3.6%, silicon 1.9%, manganese 0.56%, chromium 0.14%, copper 0.53%, molybdenum 0.36%, nickel 0.01%, all the other are iron, the component raw material is ferromanganese, molybdenum-iron, electrolytic copper, low-carbon (LC) chromium, nickel plate, the new pig iron, old iron and steel scrap, and weighing is stand-by;
B, melting: load weighted ferromanganese, molybdenum-iron, electrolytic copper, low-carbon (LC) chromium and nickel plate are added furnace bottom, then with the heating of 750kg medium-frequency induction furnace, power progressively is increased to 350KW from 220KW, the heating back adds the new pig iron, old iron and steel scrap, the adding method is: the new pig iron and the disposable adding of steel scrap, and old iron progressively adds, and keeps induction furnace completely to expect, till the stand-by old iron charge of weighing all adds, add ferrosilicon insulation to whole furnace charge fusings then and finish; Carry out quick on-the-spot sample analysis simultaneously, the composition adjustment: in fusion process, get the quick on-the-spot sample analysis of molten iron, recording carbon and silicon equivalent is 4.3;
C, inoculation: after all the furnace charges fusing finished, temperature remained on 1480 ℃, and the 0.4% block silicon titanate innoculant that adds weight of molten iron simultaneously carries out inoculation;
D, remove slag: after the inoculation, continue to heat, insulation makes molten iron overheated 2 minutes when furnace temperature reaches 1510 ℃, adds the poly-slag agent of cast iron and the agent of removing slag and removes slag;
E, casting and late inoculation are handled: adopt the low temperature teeming practice, and 1330 ℃ of pouring temperatures, the 0.1% powdery silicon titanate innoculant that adds weight of molten iron before the casting carries out late inoculation to be handled;
F, insulation: after casting is finished, seal natural thermal insulation 3 hours, unpack then, get blank at die box.
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100957733A CN100491572C (en) | 2005-11-22 | 2005-11-22 | Manufacture method for front brake disc cast for use in car |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2005100957733A CN100491572C (en) | 2005-11-22 | 2005-11-22 | Manufacture method for front brake disc cast for use in car |
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| CN1970808A CN1970808A (en) | 2007-05-30 |
| CN100491572C true CN100491572C (en) | 2009-05-27 |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102417949A (en) * | 2011-11-25 | 2012-04-18 | 河南万向***制动器有限公司 | Production process for material specially used for braking part of automobile |
| CN102776433A (en) * | 2012-07-10 | 2012-11-14 | 常州常瑞天力动力机械有限公司 | Reinforced composite post inoculation technology for short-flow smelting |
| CN102829124A (en) * | 2012-08-03 | 2012-12-19 | 十堰万益工贸有限公司 | Inertia ring of silicon oil damper |
| CN104152783A (en) * | 2014-04-30 | 2014-11-19 | 山东常林机械集团股份有限公司 | Technical formula and method of high-strength gray cast iron casting for high-end hydraulic pressure |
| CN103952621B (en) * | 2014-05-26 | 2016-08-24 | 陈国� | A kind of vanadium titanium casting pig and production technology thereof |
| CN104451358A (en) * | 2014-11-27 | 2015-03-25 | 重庆市铜梁县文曲机械铸造厂 | Wear resisting cast iron vehicle wheel and production process thereof |
| CN104990798B (en) * | 2015-07-27 | 2018-04-27 | 周洪涛 | A kind of experimental rig and method for fragile material wedge pressure intensity |
| CN107345285A (en) * | 2016-05-05 | 2017-11-14 | 通富热处理(昆山)有限公司 | Automobile brake disc alloy gray cast-iron material, automobile brake disc and preparation method thereof |
| BR102016021139B1 (en) * | 2016-09-13 | 2021-11-30 | Tupy S.A. | VERMICULAR CAST IRON ALLOY AND INTERNAL COMBUSTION ENGINE HEAD |
| CN108315633B (en) * | 2018-01-26 | 2020-10-30 | 清华大学 | Gray cast iron with high heat conductivity and high strength and preparation method thereof |
| CN108315635A (en) * | 2018-03-09 | 2018-07-24 | 金华浩翔汽配有限公司 | High-carbon brake disc matches and its manufacture craft |
| CN111621692B (en) * | 2020-06-16 | 2021-11-23 | 广东扬山联合精密制造股份有限公司 | Low-carbon brake disc and manufacturing method thereof |
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- 2005-11-22 CN CNB2005100957733A patent/CN100491572C/en not_active Expired - Fee Related
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| 低合金化灰铸铁汽车制动鼓的研制. 黄笑梅，程和法等.汽车工艺与材料，第1期. 2002 |
| 低合金化灰铸铁汽车制动鼓的研制. 黄笑梅，程和法等.汽车工艺与材料，第1期. 2002 * |
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