High-ductility high-strength rare earth aluminum alloy material and preparation method thereof

Abstract

On the one hand, the invention provides a high-ductility high-strength rare earth aluminum alloy material. The rare earth aluminum alloy material comprises the following components of, in percentage by mass, 2.0% - 3.5% of Si, 3.5% - 5.0% of Cu, 0.5% - 0.9% of Mn, 0.1% - 0.5% of Re, 0.1% - 0.2% of Ti, 0.005% - 0.05% of Sr and 80% - 92% of Al, wherein the Re is mixed rare earth containing Ce and La. According to the high-ductility high-strength rare earth aluminum alloy material, the rare earth element is introduced into an aluminum alloy, so that the fluidity of the aluminum alloy is improved,and the initiation of shrinkage porosity, shrinkage and crack is reduced. On the other hand, the invention provides a preparation method of the high-ductility high-strength rare earth aluminum alloymaterial. An indirect squeeze casting process is adopted, industrial scale production is realized, and the rare earth aluminum alloy material has great development potential in the fields of automobile light weight, intelligent robots, aerospace and the like.

Description

technical field [0001] The invention belongs to the technical field of metal alloys, in particular to a rare earth aluminum alloy material with high ductility and high strength and a preparation method thereof. Background technique [0002] Aluminum alloy is a kind of non-ferrous metal structural material. It has the advantages of low density, high strength, good plasticity, excellent electrical and thermal conductivity, and corrosion resistance. It is widely used in aerospace, automobile manufacturing, 3C products, ships, and chemical industries. With the development trend of lightweight, the demand for aluminum alloy materials is increasing; in the field of automobile manufacturing, the use of aluminum alloy materials for the overall body and accessories is the development direction of automobile lightweight, so the mechanical properties and casting of aluminum alloy materials Performance puts forward higher requirements. [0003] High-strength and tough aluminum alloy ma...

AI Technical Summary

Problems solved by technology

However, deformed aluminum alloys have high requirements for equipment and tooling molds, and the preparation process is cumbersome, which has the disadvantages of long production cycle and high production cost.

Compared with wrought aluminum alloys, cast aluminum alloys have the advantages of short procedures and high production efficiency, especially in the production of castings with complex structures. However, cast aluminum alloys have strict requirements on alloy composition control and alloy performance, such as: cast aluminum alloys The alloy needs to have good flow properties and solidification shrinkage, otherwise the cast product is difficult to shape or has defects that are difficult to eliminate

At present, A356 aluminum alloy is a type of cast aluminum alloy that is widely used. Its disadvantages are: general tensile strength and elongation performance, and limited application range.

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