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Carborundum-added particle-reinforced silicon aluminum alloy matrix composite for brake disc and preparation method thereof

A technology of silicon carbide particles and silicon-aluminum alloy, applied in the field of brake discs, can solve the problems of poor thermal conductivity, poor wear resistance, easy thermal cracking, etc., and achieve the effects of easy preparation, low cost, and high specific strength and stiffness.

Active Publication Date: 2013-05-01
SHANDONG ZHENGNUO GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing a silicon carbide particle-reinforced silicon-aluminum alloy-based composite material for brake discs, which can solve the defects of existing cast iron brake discs such as heavy weight, poor thermal conductivity, poor wear resistance, and easy thermal cracking.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A method for preparing a silicon-aluminum alloy-based composite material reinforced with silicon carbide particles for a brake disc. The raw materials include a matrix silicon-aluminum alloy and silicon carbide; wherein the raw materials for preparing the matrix silicon-aluminum alloy include 16.5 parts by weight of an Al-26Si aluminum alloy blank, 2.5 parts by weight of the ZAlSi9Mg aluminum alloy blank, 1.3 parts by weight of the AZ91D magnesium alloy blank, 0.29 parts by weight of the master alloy Al-40Cu, 2.6 parts by weight of the master alloy Al-8Ni, 1.0 parts by weight of the master alloy Al-5Ti, 1.0 parts by weight part of master alloy Al-10Mn, 0.35 parts by weight of modifier, and 0.15 parts by weight of refining agent; the specific preparation method of the composite material is as follows: (1), Al-26Si aluminum alloy billet, ZAlSi9Mg aluminum alloy billet, master alloy Al -40Cu, master alloy Al-8Ni, master alloy Al-5Ti and master alloy Al-10Mn were preheat...

Embodiment 2

[0015] A method for preparing a silicon carbide particle-reinforced silicon-aluminum alloy-based composite material for a brake disc. On the basis of Example 1, the raw materials are optimized as follows: ZAlSi9Mg aluminum alloy blank chemical composition weight percentage is Si: 8.84%, Mg : 0.33%, Fe: 0.18%, Mn: 0.18%, Ti: 0.09%, Zn: 0.01%, the balance is Al; the chemical composition weight percentage of AZ91D magnesium alloy billet is Al: 8.8%, Zn: 0.86%, Mn: 0.25%, Si: 0.032%, Cu: 0.012%, Ni: 0.007%, Fe: 0.0020%, and the balance is Mg; the modifier is PM phosphorus salt modifier; the refining agent is hexachloroethane or inorganic compound refining agent, Inorganic composite refining agent consists of 13-17 parts by weight of sodium nitrate, 14-18 parts by weight of sodium chloride, 24-26 parts by weight of potassium nitrate, 6-7 parts by weight of Na 2 SiF 6 , 7-12 parts by weight Na 3 AlF6 , 4-6 parts by weight of calcium fluoride, 6-12 parts by weight of graphite and ...

Embodiment 3

[0017] A method for preparing a silicon-aluminum alloy-based composite material reinforced with silicon carbide particles for brake discs. On the basis of Example 1, the raw materials for preparing the matrix silicon-aluminum alloy also include 0.09-0.1 parts by weight of Mo with a purity of not less than 99%. , 0.8-1.0 parts by weight of master alloy Fe-5Nb or 0.05 parts by weight of high-purity niobium with a purity greater than 99%; and high-purity Mo and Fe-5Nb (high-purity niobium) are preheated to 420- 425°C, and add smelting in step (5).

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Abstract

The invention relates to the technical field of brake disks, in particular to a carborundum-added particle-reinforced silicon aluminum alloy matrix composite for a brake disc and a preparation method of the composite. The technical scheme adopted by the invention is as follows: the raw material of the composite takes an alloy of silicon and aluminum as a basal body and is reinforced via immersing silicon carbide particles; the alloy of the silicon and the aluminum takes a Al-26Si aluminum alloy blank material, and a ZAlSi9Mg aluminum alloy blank material as the main body, and modest elements such as Cu, Ni, Ti, Mn and the like are added and melted to form the alloy; and chemical copper plating treatment is required to carry out before immersing the silicon carbide particles. The aluminum matrix composite prepared by the preparation method is light in weight, high in specific strength and specific stiffness, and low in thermal expansion coefficient, and has good thermal conduction performance and abrasion resistance.

Description

technical field [0001] The invention relates to the technical field of brake discs, in particular to a preparation method of a silicon carbide particle-reinforced silicon-aluminum alloy-based composite material for brake discs. Background technique [0002] The brake disc is an important part of the automobile braking system, and its braking performance is directly related to the driving safety of the vehicle. The surface temperature of the widely used cast iron brake disc is as high as 600°C due to the heat generated by the brake friction. Sex is poor. At present, the industry tries to use aluminum alloy instead of cast iron to cast brake discs. Although it is light in weight and has good thermal conductivity, its strength and hardness are low, which hinders its application in brake discs. Contents of the invention [0003] The invention provides a method for preparing a silicon carbide particle-reinforced silicon-aluminum alloy-based composite material for brake discs,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/03C22C1/06C22C21/04
Inventor 商好峰李广全宋立伟
Owner SHANDONG ZHENGNUO GRP
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