A kind of ultra-high performance silicon-aluminum alloy and preparation method thereof

Abstract

The invention provides an ultra-high-performance silicon-aluminum alloy and a preparation method thereof. The mass percentage composition of the silicon-aluminum alloy elements is: Si 16-18%, Mg 0.7-1.3%, Cu 3.5-4.5%, Fe 5.5-6.5% , the balance being Al. The method includes the following steps: the silicon aluminum alloy elements Si, Mg, Cu, Fe and Al are sprayed in proportion to obtain a primary product, the primary product is densified by hot processing and extruded, and the finished product is obtained by heat treatment in a T6 state. Beneficial effects brought by the invention: by adjusting the proportion of silicon-aluminum alloy elements and improving the method, the prepared novel silicon-aluminum alloy has higher tensile strength and higher hardness.

Description

technical field [0001] The invention belongs to the technical field of aluminum alloys and their processes, and in particular relates to an ultra-high-performance silicon-aluminum alloy and a preparation method thereof. Background technique [0002] Silicon aluminum alloy has the advantages of small specific gravity, low density, high thermal conductivity, low thermal expansion coefficient, good machining performance, good wear resistance and corrosion resistance, high surface hardness and certain high temperature strength. Therefore, it is widely used in electronic packaging materials for radar, wear-resistant materials for cylinder liners and connecting rods, pistons, rotor materials and other fields. In order to further improve the performance of silicon-aluminum alloys, those skilled in the art use spray forming technology to solve the traditional aluminum alloy preparation process problems. Coarse and irregular primary silicon transforms into uniformly distributed fine...

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Problems solved by technology

However, the hardness and strength of silicon-aluminum alloy prepared by spray forming technology are relatively weak.

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