A high-performance Al-Si alloy synergistically strengthened by Ce and TiC / TiB2, its preparation method and application

Abstract

The application relates to the technical field of non-ferrous metal materials and casting processes, and discloses a Ce and TiC / TiB2 synergistically reinforced high-performance Al-Si alloy as well as a preparation method and application thereof. The Al-Si alloy is composed of the following components in percentage by mass: Si 5.0%-12.0%, Cu 0.2%-4.0%, Zn 2.0%-4.0%, Mg 0.3%-3.0%, Mn 0.2%-0.8%, Ce 0.1%-0.5%, TiC / TiB2 nanoparticles 0.2%-2.5%, and the balance of Al and inevitable impurities. The Al-Si alloy provided by the application has a compact structure, few defects such as pores and shrinkage, a tensile strength of 368 MPa, a yield strength of 238 MPa, and an elongation of 7.6%, and has both strength and toughness, so that the application requirements of the fields of automobiles, aerospace, electronics and the like can be met.

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