Manufacture method for front brake disc cast for use in car

A production method and technology of brake discs, which are applied in the production of auto parts and the production of front brake disc castings for cars, can solve the problems of product performance impact, increase, and unqualified products, and achieve reasonable production methods and processes Simple and convenient, obvious economic benefits, good wear resistance effect

Inactive Publication Date: 2009-05-27
丹阳市万隆机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] C (carbon) ≥ 3.6, Si (silicon) ≥ 1.6, Mn (manganese) 0.4-0.8, P (phosphorus) ≤ 0.10, S (sulfur) ≤ 0.10, Cu ≤ 0.6, Cr ≤ 0.20, Mo ≤ 0.60, Ni ≤ 0.20, based on this, various car wheels can be produced, but in actual production, the control precision of each component is very high, and small component differences will have a great impact on the performance of the finished product, and even cause the product to be unqualified
From the perspective of low cost, each component should be considered at a low limit, and at the same time, there are high requirements for performance, so more precise component control is required; in addition, as a front brake disc casting for a car, a high carbon-silicon equivalent is required. , High pearlite content, and at the same time, the tensile strength, wedge strength, and Brinell hardness will increase with the increase of pearlite content, resulting in reduced performance of the casting, or even unqualified
[0006] According to the applicant's search, "Material Technology" P21-22, Li Cunke and Fang Ruixiang's article "Research on Casting Process of Special Cast Iron Brake Disc for High-speed Trains" mentioned the mechanical properties and chemical composition of RuT380: chemical composition C (carbon) 3.6 -3.8, Si (silicon) 2.2-3.0, Mn0.4-1.0, P (phosphorus) ≤ 0.07, S (sulfur) ≤ 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 a special cast iron brake disc for high-speed trains, adding titanium, magnesium and rare earth elements, the cost is high, and it is not suitable for cars use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of casting of front brake disc of a kind of car of the present invention, its each raw material component is calculated by 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%, and the rest is iron. The component raw materials are ferromanganese, ferromolybdenum, electrolytic copper, low-carbon chromium, nickel plate, new iron, old iron (recycled material) and scrap steel.

[0021] The above-mentioned casting of a front brake disc for a car is manufactured in the following steps:

[0022] a. Ingredients: According to the above design requirements, firstly measure the chemical composition and percentage of each required raw material, then calculate the amount of required raw material according to the chemically pure content, and weigh it for use;

[0023] b. Smelting: Add the weighed ferromanganese, ferromolybdenum, electrolytic copper,...

Embodiment 2

[0029] A kind of front brake disc casting for a car with embodiment 1, its difference is that the weight percent of each component is: carbon 3.7%, silicon 1.8%, manganese 0.76%, chromium 0.16%, copper 0.57%, molybdenum 0.33% %, nickel 0.04%, and the rest is iron.

[0030] Its preparation method is the same as embodiment one, and the difference is:

[0031] When removing slag, when the furnace temperature reaches 1520°C, keep it warm, make the molten iron overheat for 2 minutes, and then add slag accumulating agent and slag removing agent to remove slag;

[0032] The temperature of the molten iron during inoculation treatment is 1500°C, and the amount of silicon-barium inoculant added is 0.45% of the weight of the molten iron;

[0033] Casting and secondary inoculation treatment: low temperature casting method is adopted, the casting temperature is 1340°C, and 0.12% silicon barium inoculant by weight of molten iron is added before casting for secondary inoculation treatment; ...

Embodiment 3

[0036]The same as the casting of a front brake disc for a car in Example 1, the difference is that the weight percentages of each component are: carbon 3.8%, silicon 1.7%, manganese 0.66%, chromium 0.18%, copper 0.60%, molybdenum 0.30% , nickel 0.08%, the rest is iron.

[0037] Its preparation method is the same as embodiment one, and the difference is:

[0038] When removing slag, when the furnace temperature reaches 1530°C, keep it warm, make the molten iron overheat for 3 minutes, and then add slag accumulating agent and slag removing agent to remove slag;

[0039] The temperature of the molten iron during inoculation treatment is 1520°C, and the amount of silicon-barium inoculant added is 0.50% of the weight of the molten iron;

[0040] Casting and secondary inoculation treatment: low temperature casting method is adopted, the casting temperature is 1360°C, and 0.15% silicon barium inoculant by weight of molten iron is added before casting for secondary inoculation treatm...

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PUM

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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 [0001] The invention relates to a manufacturing method of a metal material, in particular to a manufacturing method of an automobile part, and more specifically to a manufacturing method of a front brake disc casting for a car. Background technique [0002] Brake discs are first seen on foreign cars. As far as their use is concerned, they belong to the category of friction brakes, that is, a device that converts the kinetic energy of the vehicle into heat through friction and then dissipates it into the atmosphere. Compared with traditional drum radiators, it has better heat dissipation performance, is suitable for high-speed driving, and has a linear effect on pedal force. Therefore, it has been partially adopted in our country in recent years, which represents a trend. In the future, including trucks, more than half of the vehicles will use disc brakes, that is, brake discs. Brake disc is a kind of vulnerable parts and security parts, its structure and mat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/08C22C33/08C21C7/076B22D46/00
CPCY02P10/20
Inventor 赵火林
Owner 丹阳市万隆机械科技有限公司
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