Preparation method of aluminum matrix composite material with enhanced particle-copper alloy interface compatibility treatment

Abstract

The invention discloses a method for preparing an aluminum-based composite material subjected to enhanced particle-copper alloy interface compatibility treatment. The preparation raw materials comprise 100 weight parts of matrix alloy, 8-10 weight parts of enhanced particles and 0.05-0.08 weight part of refining agent, wherein the matrix alloy selects 75-80 weight parts of cast aluminum alloy ZAlSi8MgBe, 15-20 weight parts of copper alloy Cu20Ni20Mn and 5-8 weight parts of copper alloy Cu20Ni35Mn; the enhanced particles refer to combinations of tungsten carbide, tetrapod-like zinc oxide whiskers, silicon carbide and nanometer titania; and the weight ratio of the four enhanced particles is (4-4.5):(3-3.5):(1-1.5):(2-2.5). The aluminum-copper-based composite material prepared by the method disclosed by the invention is light in weight, high in specific strength, high in specific stiffness and low in thermal expansion coefficient and has high thermal conductivity and high wear and corrosion resistance. Moreover, the preparation is simple, the cost is low, the enhanced phase is in dispersed distribution in the matrix and has isotropy, and the composite material is applied to various complex stress states.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a preparation method of an aluminum-based composite material used for the compatibility treatment of the reinforced particle-copper alloy interface of a brake disc. 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 cast iron brake discs widely used at present is as high as 600°C due to the heat generated by brake friction. The working surface temperature is very high and the temperature gradient is large, which is easy to form hot spots and cause thermal cracks, and the wear resistance of cast iron brake discs is poor. . At present, the industry is trying 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 ...

AI Technical Summary

Problems solved by technology

[0003] The invention provides a method for preparing an aluminum-based composite material with enhanced particle-copper alloy interface compatibility treatment. As a material for brake discs, it can solve the problems of heavy weight, poor thermal conductivity, poor wear resistance and easy thermal cracking of existing cast iron brake discs. At the same time, it can solve the defect that the performance of the existing aluminum matrix composite material is not ideal due to the poor interface compatibility.