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Preparation method of carborundum-added particle-reinforced silicon aluminum alloy matrix composite for brake disc

A technology of silicon carbide particles and silicon-aluminum alloys, which is applied in the field of brake discs, can solve problems such as poor thermal conductivity, poor wear resistance, and heavy weight, and achieve the effects of easy preparation, low cost, and light weight

Active Publication Date: 2014-08-13
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

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Effect test

Embodiment 1

[0013] A method for preparing a silicon-aluminum alloy matrix composite material reinforced with silicon carbide particles for brake discs. The raw materials include a base silicon-aluminum alloy and silicon carbide; wherein the raw material for preparing the base silicon-aluminum alloy includes 16.5 parts by weight of Al-26Si aluminum alloy blanks, 2.5 parts by weight of ZAlSi9Mg aluminum alloy blank, 1.3 parts by weight of AZ91D magnesium alloy blank, 0.29 parts by weight of master alloy Al-40Cu, 2.6 parts by weight of master alloy Al-8Ni, 1.0 parts by weight of master alloy Al-5Ti, 1.0 weight Parts of master alloy Al-10Mn, 0.35 parts by weight of modifier, 0.15 parts by weight of refining agent; the specific preparation method of the composite material is as follows: (1), Al-26Si aluminum alloy blank, ZAlSi9Mg aluminum alloy blank, master alloy Al -40Cu, master alloy Al-8Ni, master alloy Al-5Ti and master alloy Al-10Mn were preheated to 420℃; (2), the modifier and refinin...

Embodiment 2

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

Embodiment 3

[0017] A method for preparing a silicon-aluminum alloy matrix composite material reinforced with silicon carbide particles for brake discs. Based on Example 1, the raw material for preparing the matrix silicon-aluminum alloy also includes 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- in the preparation step (1) 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-aluminum alloy matrix composite material reinforced with silicon carbide particles for brake discs. Background technique [0002] The brake disc is an important part of the automobile brake system, and its braking performance is directly related to the driving safety of the vehicle. At present, the widely used cast iron brake discs have a surface temperature of up to 600°C due to brake friction heating. The working surface temperature is very high and the temperature gradient is large. It is easy to form hot spots and cause thermal cracks. The cast iron brake discs are heavy and wear-resistant Poor sex. At present, the industry tries to use aluminum alloy instead of cast iron to cast brake discs. Despite its light weight and good thermal conductivity, its strength and hardness are low, which hinders its application in brake discs. Summary of the...

Claims

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Application Information

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Patent Type & Authority Patents(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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