CN104745916A - Automobile brake drum and manufacturing method - Google Patents
Automobile brake drum and manufacturing method Download PDFInfo
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- CN104745916A CN104745916A CN201310743964.0A CN201310743964A CN104745916A CN 104745916 A CN104745916 A CN 104745916A CN 201310743964 A CN201310743964 A CN 201310743964A CN 104745916 A CN104745916 A CN 104745916A
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Abstract
Belonging to a casting material and the casting method field, the invention discloses an automobile brake drum and a manufacturing method, and relates to a making method for an automobile part brake drum. The automobile brake drum is characterized by being prepared from the following raw materials by weight: 3.00-3.24% of C, 1.6-1.74% of Si, 0.45-0.49% of Mn, 0.05-0.1% of V, 0.1-0.25% of W, 0.38-0.45% of Cr, 0.4-0.7% of Co, and the balance Fe and inevitable impurities. By adopting a twice inoculation manufacturing process, the tensile strength and yield strength can be improved, the mechanical properties exceed ordinary grey cast iron brake drum material HT250, the tensile strength reaches more than 250Mpa, and the hardness HBS value reaches over 200, the wear resistance is good, the friction coefficient is high, and the production cost is low, the method can be used for making automobile brake drums and has broad application prospects. The brake drum product prepared by the method has the advantages of sensitive braking, comfortable and noiseless braking process, no damage to brake drum, and long service life.
Description
Technical field
The present invention relates to a kind of making method of automobile component brake drum, belong to a kind of cast material and castmethod field, specifically a kind of automobile brake drum and manufacture method.
Background technology
Stopper has the device making moving parts deceleration, stop or keeping the functions such as halted state; The mechanical component that the moving parts in machinery can be made to stop or slowing down.Stopper can be divided into two large classes, industrial stopper and automotive brake.Automotive brake is divided into again running brake, EPB and balancing force amplifying brake.When driving, generally all adopt novel balancing force amplifying brake, because balancing force amplifying brake coordinates spiral groove brake drum that automobile can be made in whole traveling to keep equilibrium state in the process of moving, and the stability of brake is also the best one in current automotive brake field, especially the officer of heavy-load automobile is had to the effect well escort.
General stopper is all apply kinetic moment by retaining element wherein to spinner member, the angle of rotation speed of the latter is reduced, rely on the adhewsive action on wheel and ground simultaneously, produce road surface to the damping force of wheel to make car deceleration, allly utilize the friction on retaining element and spinner member surface and the stopper that produces braking moment all becomes friction brake.Automobile friction brake used can be divided into drum-type and the large class of disc type two.Drum brake is a kind of stopper the most frequently used on automobile, and its working edge face is internal surface of column, and retaining element is the brake(-holder) block of the band friction plate of circular arc, and its advantage is that cost is low, dust-proof.Brake drum applies braking moment by retaining element wherein to spinner member, and the angle of rotation speed of the latter is reduced, and relies on the adhewsive action on wheel and ground simultaneously, produces road surface to the damping force of wheel to make car deceleration.
Brake-block temperature can be caused when vehicle brake is more frequent too high, and finally cause brake facing because of damping force decline and expanded by heating, serious can cause brake system locking.Mainly there is following subject matter in the brake facing that current China vehicle uses: 1, heat fading is larger: when vehicle brake is more frequent, brake facing can be caused to generate heat (temperatures as high more than 350 DEG C), thus cause frictional coefficient to reduce, there is heat fading phenomenon, affect the stability of damping force; 2, emergency sensitiveness is not high: at present, vehicle exist snub situation more time, therefore require friction plate to have more suitable Young's modulus and mating plate stickiness is better; 3, brake noise is large: bus brake noise is also a kind of very general phenomenon.Along with requiring more and more higher to urban environment, also higher requirement is constantly proposed to the brake noise of automobile.The city had at present just proposes auto Not Permitted brake noise.
Along with development and the development of equipment manufacture, the output of state's internal brake is also significantly increased, the sales revenue simultaneous growth of stopper industry; Owing to being limited by, starting is late, technical foundation is weak and capital investment is limited, China's stopper product is based on low-end product, minority leading companies adheres to autonomous innovation in the industry, strengthens Innovation Input, to the middle and high end line of production development that scientific and technological content is higher.
Summary of the invention
The object of the invention be the production process that exists for metal in above prior art, semi-metal, asbestos brake lining not environmentally, brake facing braking time moment unstable, wear no resistance, the problem such as work-ing life is short, noise is large, brake drum and the preparation method of a kind of safety and environmental protection, good braking performance and good, long service life are provided.
For achieving the above object, a kind of automobile brake drum material of the present invention, described brake drum is made up of the raw material of following weight proportion: C3.00 ~ 3.24%, Si1.6 ~ 1.74%, Mn0.45 ~ 0.49%, V0.05 ~ 0.1%, W0.1 ~ 0.25%, Cr0.38 ~ 0.45%, Co0.4 ~ 0.7%, and surplus is Fe and inevitable impurity.
Described inevitable impurity comprises P and S, and wherein, the content of P, S impurity is respectively: P≤0.1%, S≤0.1%.
The manufacture method of a kind of automobile brake drum material of the present invention, it comprises the steps:
A, melting: preparation raw material, be made up of the raw material of following weight proportion: C3.00 ~ 3.24%, Si1.6 ~ 1.74%, Mn0.45 ~ 0.49%, V0.05 ~ 0.1%, W0.1 ~ 0.25%, Cr0.38 ~ 0.45%, Co0.4 ~ 0.7%, surplus is Fe and inevitable impurity; By the raw material of preparation in 1520 ~ 1580 DEG C of meltings, obtain molten iron;
B, to breed: 1. first time breeds: the nucleating agent adding 0.1 ~ 0.2% of weight of molten iron, carry out first time to breed, incubation time is 8 ~ 12min, wherein, tapping temperature when casting ladle poured into by molten iron is 1480 ~ 1500 DEG C, treats that after nucleating agent melts completely, molten iron being proceeded to pouring ladle carries out current-following inoculation; 2. current-following inoculation: the nucleating agent adding 0.1 ~ 0.25% of weight of molten iron in pouring ladle, carries out current-following inoculation, and the incubation time is 8 ~ 12min, and wherein, molten iron tapping temperature is 1450 ~ 1480 DEG C.
C, casting, obtain brake drum material.
Described nucleating agent is one in SiZrSr, BaCaSi or its combination.
The reaction conditions that described first time breeds is: the incubation time is 8 ~ 12min, and wherein, tapping temperature when casting ladle poured into by molten iron is 1480 ~ 1500 DEG C.
The reaction conditions of described current-following inoculation is: the incubation time is 8 ~ 12min, and wherein, molten iron tapping temperature is 1450 ~ 1480 DEG C.
A kind of automobile brake drum of the present invention and manufacture method, its beneficial effect is: the brake drum adopting twice inoculated technology manufacture, can reduce the cementite quantity in as-cast structure, improve tensile strength, yield strength; And its mechanical property has exceeded common grey iron brake drum material HT250, tensile strength has reached more than 250Mpa, and hardness HBS value reaches more than 200, wear resisting property is good, and frictional coefficient is high, and production cost is low, can be used in preparing brake drum for automobile, have broad application prospects; It is sensitive that the brake drum product prepared by present method has braking, and the comfortable noiselessness of braking procedure, does not damage brake drum, the advantage of long service life.
Embodiment
Below in conjunction with the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only one of them embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment 1
A, melting: preparation raw material, be made up of the raw material of following weight proportion: C3.00%, Si1.74%, Mn0.49%, V0.1%, W0.25%, Cr0.45%, Co0.7%, P0.1%, S0.1%, and surplus is Fe; By the raw material of preparation in 1520 DEG C of meltings, obtain molten iron;
B, to breed: 1. first time breeds: the SiZrSr adding 0.1% of weight of molten iron, carry out first time to breed, the incubation time is 8min, wherein, tapping temperature when casting ladle poured into by molten iron is 1480 DEG C, treats that after nucleating agent melts completely, molten iron being proceeded to pouring ladle carries out current-following inoculation; 2. current-following inoculation: the SiZrSr adding 0.1% of weight of molten iron in pouring ladle, carries out current-following inoculation, and the incubation time is 8min, and wherein, molten iron tapping temperature is 1450 DEG C.
C, casting, obtain brake drum material.
Embodiment 2
A, melting: preparation raw material, be made up of the raw material of following weight proportion: C3.24%, Si1.6%, Mn0.45%, V0.05%, W0.1%, Cr0.38%, Co0.4%, P0.1%, S0.1%, and surplus is Fe; By the raw material of preparation in 1580 DEG C of meltings, obtain molten iron;
B, to breed: 1. first time breeds: the BaCaSi adding 0.2% of weight of molten iron, carry out first time to breed, the incubation time is 12min, wherein, tapping temperature when casting ladle poured into by molten iron is 1500 DEG C, treats that after nucleating agent melts completely, molten iron being proceeded to pouring ladle carries out current-following inoculation; 2. current-following inoculation: the BaCaSi adding 0.25% of weight of molten iron in pouring ladle, carries out current-following inoculation, and the incubation time is 12min, and wherein, molten iron tapping temperature is 1480 DEG C.
C, casting, obtain brake drum material.
Embodiment 3
A, melting: preparation raw material, be made up of the raw material of following weight proportion: C3.20%, Si1.70%, Mn0.45%, V0.08%, W0.20%, Cr0.40%, Co0.6%, P0.1%, S0.1%, and surplus is Fe; By the raw material of preparation in 1550 DEG C of meltings, obtain molten iron;
B, to breed: 1. first time breeds: the SiZrSr adding 0.1% of weight of molten iron, carry out first time to breed, the incubation time is 10min, wherein, tapping temperature when casting ladle poured into by molten iron is 1485 DEG C, treats that after nucleating agent melts completely, molten iron being proceeded to pouring ladle carries out current-following inoculation; 2. current-following inoculation: the BaCaSi adding 0.20% of weight of molten iron in pouring ladle, carries out current-following inoculation, and the incubation time is 10min, and wherein, molten iron tapping temperature is 1450 DEG C.
C, casting, obtain brake drum material.
Show through actual measurement, the product strength obtained by the present invention reaches 250 ~ 300Mpa; Braking surface hardness reaches 187 ~ 255HB; Entrucking reaches more than 90,000 kilometers work-ing life; Fatigue test number of times reaches more than 5000 times.Cause the comprehensive rub resistance of brake drum, the wear-resisting thermal fatigue resistance that undermines can improve and steady quality; There is stronger noise absorption capability and friction catch ability simultaneously.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. an automobile brake drum material, it is characterized in that: described brake drum is made up of the raw material of following weight proportion: C3.00 ~ 3.24%, Si1.6 ~ 1.74%, Mn0.45 ~ 0.49%, V0.05 ~ 0.1%, W0.1 ~ 0.25%, Cr0.38 ~ 0.45%, Co0.4 ~ 0.7%, surplus is Fe and inevitable impurity.
2. a kind of automobile brake drum material as claimed in claim 1, it is characterized in that: described inevitable impurity comprises P and S, wherein, the content of P, S impurity is respectively: P≤0.1%, S≤0.1%.
3. the manufacture method of a kind of automobile brake drum material as claimed in claim 1, is characterized in that: comprise the steps:
A, melting: preparation raw material, weighed in corresponding ratio by raw material and sequentially add and carry out melting, smelting temperature is 1520 ~ 1580 DEG C, obtains molten iron;
B, to breed: 1. first time breeds: the nucleating agent adding 0.1 ~ 0.2% of weight of molten iron, carries out first time and breeds, treat that after nucleating agent melts completely, molten iron being proceeded to pouring ladle carries out current-following inoculation; 2. current-following inoculation: the nucleating agent adding 0.1 ~ 0.25% of weight of molten iron in pouring ladle, carries out current-following inoculation;
C, casting, obtain brake drum material.
4. the manufacture method of a kind of automobile brake drum material as claimed in claim 3, is characterized in that: described nucleating agent is one in SiZrSr, BaCaSi or its combination.
5. the manufacture method of a kind of automobile brake drum material as claimed in claim 3, is characterized in that: the reaction conditions that described first time breeds is: the incubation time is 8 ~ 12min, and wherein, tapping temperature when casting ladle poured into by molten iron is 1480 ~ 1500 DEG C.
6. the manufacture method of a kind of automobile brake drum material as claimed in claim 3, it is characterized in that: the reaction conditions of described current-following inoculation is: the incubation time is 8 ~ 12min, wherein, molten iron tapping temperature is 1450 ~ 1480 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310743964.0A CN104745916B (en) | 2013-12-30 | 2013-12-30 | Automobile brake drum and manufacturing method |
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| CN201310743964.0A CN104745916B (en) | 2013-12-30 | 2013-12-30 | Automobile brake drum and manufacturing method |
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| CN104745916B CN104745916B (en) | 2017-05-24 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952621A (en) * | 2014-05-26 | 2014-07-30 | 四川省富邦钒钛制动鼓有限公司 | Vanadium-titanium gray cast iron and production technique thereof |
| CN114054683A (en) * | 2021-11-30 | 2022-02-18 | 山西汤荣机械制造股份有限公司 | Preparation method of high-strength wear-resistant gray cast iron brake drum |
Citations (5)
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| JPH04128340A (en) * | 1990-09-19 | 1992-04-28 | Hitachi Ltd | Compact vermicular graphite cast iron and sheave for elevator using the same |
| CN1100150A (en) * | 1993-09-09 | 1995-03-15 | 株洲市机械工业研究所 | Impact fatigue-resistant wear-proof alloy cast iron |
| CN101967601A (en) * | 2010-11-10 | 2011-02-09 | 吉林大学 | Cast iron for cast-iron brake drum |
| CN102268585A (en) * | 2011-08-04 | 2011-12-07 | 黄石东贝铸造有限公司 | Cast automotive brake hub with high heat fading resistance |
| WO2012073220A1 (en) * | 2010-12-02 | 2012-06-07 | Freni Brembo S.P.A. | Brake disc for a disc brake |
-
2013
- 2013-12-30 CN CN201310743964.0A patent/CN104745916B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04128340A (en) * | 1990-09-19 | 1992-04-28 | Hitachi Ltd | Compact vermicular graphite cast iron and sheave for elevator using the same |
| CN1100150A (en) * | 1993-09-09 | 1995-03-15 | 株洲市机械工业研究所 | Impact fatigue-resistant wear-proof alloy cast iron |
| CN101967601A (en) * | 2010-11-10 | 2011-02-09 | 吉林大学 | Cast iron for cast-iron brake drum |
| WO2012073220A1 (en) * | 2010-12-02 | 2012-06-07 | Freni Brembo S.P.A. | Brake disc for a disc brake |
| CN102268585A (en) * | 2011-08-04 | 2011-12-07 | 黄石东贝铸造有限公司 | Cast automotive brake hub with high heat fading resistance |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103952621A (en) * | 2014-05-26 | 2014-07-30 | 四川省富邦钒钛制动鼓有限公司 | Vanadium-titanium gray cast iron and production technique thereof |
| CN114054683A (en) * | 2021-11-30 | 2022-02-18 | 山西汤荣机械制造股份有限公司 | Preparation method of high-strength wear-resistant gray cast iron brake drum |
| CN114054683B (en) * | 2021-11-30 | 2023-06-02 | 山西汤荣机械制造股份有限公司 | Preparation method of high-strength wear-resistant gray cast iron brake drum |
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| CN104745916B (en) | 2017-05-24 |
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