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Casting material of a brake disc of a disc brake and processing technology of the brake disc

A disc brake and processing technology, applied in the direction of the brake disc, etc., can solve the problems of thermal cracking of the working surface of the brake disc, formation of ripples on the brake disc, and reduction of braking efficiency, so as to improve thermal fatigue resistance and delay The effect of forming and expanding, prolonging the service life

Inactive Publication Date: 2016-04-13
SINO TRUK JINAN POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The brake discs of heavy-duty truck disc brakes are generally made of graphite cast iron materials. The processing steps of the products are: casting - normalizing (or stress relief annealing) - machining After running, it will be deformed due to high temperature, and the surface of the brake disc will form ripples, which will cause the wheel to vibrate during braking and reduce the braking efficiency. After a period of use, the working surface of the brake disc will also appear thermal cracking. How to delay the occurrence of this phenomenon and improve the service life of the brake disc, there are many ways to realize it, including the use of new materials such as carbon fiber and ceramics with high cost, and some complicated processing techniques such as surface spraying and modification. good but expensive

Method used

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Embodiment 1

[0021] An embodiment of the present invention provides a casting material for a brake disc of a disc brake. The weight percentage of its chemical composition is: carbon 2.76%, silicon 2.13%, manganese 0.64%, sulfur 0.145%, phosphorus 0.120%, tungsten 0.03%, 0.05% zinc, 0.10% nickel and 0.02% tin, and the rest of iron elements and impurities; the casting material is pearlitic gray cast iron.

[0022] The embodiment of the present invention also provides a processing technology for a brake disc of a disc brake, comprising the following steps:

[0023] (1) Heating step: the brake disc is heated by intermediate frequency induction heating equipment; the heating time is 79s, the rated output frequency of the intermediate frequency induction heating equipment is 30kHZ, and the rated power is 200kw;

[0024] (2) Rapid cooling and normalizing step: when the surface temperature of the brake disc is 890°C, put the brake disc into the shot blasting machine within 6 seconds, and start the...

Embodiment 2

[0028] An embodiment of the present invention provides a casting material for a brake disc of a disc brake. The weight percentage of its chemical composition is: carbon 3.23%, silicon 1.86%, manganese 0.95%, sulfur 0.107%, phosphorus 0.140%, tungsten 0.05%, 0.07% of zinc, 0.13% of nickel and 0.03% of tin, and the balance of iron and impurities.

[0029] The embodiment of the present invention also provides a processing technology for a brake disc of a disc brake, comprising the following steps:

[0030] (1) Heating step: heat the brake disc through the medium frequency induction heating equipment; the heating time is 72s, the rated output frequency of the medium frequency induction heating equipment is 30kHZ, and the rated power is 200kw;

[0031] (2) Rapid cooling and normalizing step: when the surface temperature of the brake disc is 860°C, put the brake disc into the shot blasting machine within 8 seconds, and start the shot blasting when the temperature of the friction sur...

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Abstract

The invention discloses a casting material of a brake disc of a disc brake and a processing technique of the brake disc, wherein the casting material comprises the following chemical components in percentage by weight: 3.23% of carbon, 1.86% of silicon, 0.95% of manganese, 0.107% of sulfur, 0.140% of phosphorus, 0.05% of tungsten, 0.07% of zinc, 0.13% of nickel and 0.03% of tin, and the balance of iron element and impurities; the casting material is pearlite type gray pig iron. The casting material and the processing technique have the beneficial effects that the brake disc manufactured from the casting material by virtue of the processing technique is capable of delaying formation of corrugations on the surface of the brake disc and postponing the formation and development of thermal fatigue cracks, and therefore, the resistance of the brake disc to contact fatigue damage and rolling deformation is improved, the thermal fatigue resisting capability of the brake disc is improved and the service life of the brake disc is prolonged.

Description

technical field [0001] The invention relates to the technical field of brake discs, in particular to a disc brake disc brake disc casting material and a processing technology for the brake disc. Background technique [0002] The brake discs of heavy-duty truck disc brakes are generally made of graphite cast iron materials. The processing steps of the products are: casting - normalizing (or stress relief annealing) - machining After running, it will be deformed due to high temperature, and the surface of the brake disc will form ripples, which will cause the wheel to vibrate during braking and reduce the braking efficiency. After a period of use, the working surface of the brake disc will also appear thermal cracking. How to delay the occurrence of this phenomenon and improve the service life of the brake disc, there are many ways to realize it, including the use of new materials such as carbon fiber and ceramics with high cost, and some complicated processing techniques such...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C37/10C21D7/06C21D5/00C21D1/28F16D65/12
Inventor 韩树曹小璞桂亮苗林壮沈洪亮张龙庞贵奇
Owner SINO TRUK JINAN POWER