High-strength and heat-resisting rare earth aluminum alloy and preparing method thereof

Abstract

The invention relates to a high-strength and heat-resisting rare earth aluminum alloy containing rare earth samarium and a preparing method of the high-strength and heat-resisting rare earth aluminumalloy and belongs to the technical field of alloys. The aluminum alloy comprises the following components including, by mass percent, 5%-6% of Zn, 2%-3% of Mg, 1%-2% of Cu, 0.1%-0.2% of Sm and the balance Al and inevitable impurities. Various second phases, uniform and fine microstructures and weak base plane textures are evenly distributed in the alloy, and therefore the alloy can have high strength and high plasticity. The invention further discloses a preparing method of the high-strength and heat-resisting rare earth aluminum alloy material, nano-order and micron-order second phases and grains with the size being relatively fine are evenly distributed in the tissue of the prepared aluminum alloy, and the mechanical performance of the aluminum alloy is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of alloys, and in particular relates to a high-temperature, high-strength aluminum alloy containing rare earth samarium and a preparation method thereof. Background technique [0002] As environmental problems become more and more obvious, the transportation industry pays more and more attention to controlling carbon dioxide emissions and improving fuel utilization. The characteristics of aluminum alloys such as low density, high specific strength and specific stiffness, corrosion resistance, and good processing performance are especially in line with the requirements for lightweight automobiles, so in the future aluminum alloys are bound to replace steel materials and become the second largest structural material. [0003] For many years, the main design idea of ​​high-strength aluminum alloys at home and abroad is to obtain high-strength aluminum alloy materials by adding rare earth and other alloying elem...

AI Technical Summary

Problems solved by technology

[0005] 1. Although the alloying method can further increase the strength of the aluminum alloy through precipitation strengthening, this method of increasing the strength is at the expense of the plasticity of the aluminum alloy;

[0006] 2. Although the alloying method of adding an appropriate amount of rare earth elements can significantly improve the strength of aluminum alloys, since rare earths are a relatively expensive resource, the cost of aluminum alloys produced by this method is extremely high and a large amount of rare earth resources are consumed. ;

[0007] 3. Although the large plastic deformation method can obtain a refined grain structure and improve the plasticity and strength of the aluminum alloy at the same time, the production equipment is complicated and expensive, and the production cycle is long

Such a processing method is not conducive to the application in actual engineering

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