High-strength Al-Zn-Mg-Cu-Ce-Y-Er-La-Sc wrought aluminum alloy and manufacturing method thereof

Abstract

The invention provides a high-strength Al-Zn-Mg-Cu-Ce-Y-Er-La-Sc wrought aluminum alloy. The alloy is composed of, by mass, 7% of Zn, 2% of Mg, 2.3% of Cu, 0.1% of Ce, 0.5% of Y, 0.1% of Er, 0.01% of La, 0.2% of Sc and the balance Al, wherein Al, Zn, Mg and Cu are added in a form of industrial pure Al, Zn, Mg and Cu with purity larger than 99.99wt.%, and Ce, Er, Y, Sc and La are added respectively in a form of powdery rare earth alloy with Al and 30wt.% of Ce, Mg and 30wt.% of Er, Mg and 20wt.% of Y, Al and 30wt.% of La, Al and 2wt.% of Sc. The invention further provides a manufacturing method of the alloy. Good composition homogenization effect is realized by adding rare earth elements and utilizing helium to blow rare earth alloy powder in, and a protecting atmosphere is formed through helium in the process of manufacturing, so that oxidizing reaction in the process of smelting is reduced as much as possible, the formed alloy is more accurate in composition, and the problem that conventional Al-Zn-Mg-Cu alloys are insufficient in performance and have product defects is solved effectively.

Description

technical field [0001] The invention relates to the technical field of metal materials, in particular to a high-strength Al-Zn-Mg-Cu-Ce-Y-Er-La-Sc deformed aluminum alloy and a preparation method thereof. Background technique [0002] From the perspective of current technology and application fields, the requirements for various properties of aluminum alloys at home and abroad are constantly improving. With the continuous promotion of its application fields, a large number of new high-strength and high-performance aluminum alloys have emerged as the times require. New challenges, from the perspective of sustainable development, the organic combination of economy, conservation, and high efficiency plays a pivotal role in the actual production process. [0003] The tensile strength and fatigue strength of traditional aluminum alloys are insufficient. In the production process, due to the addition of refining agents, some pollution is caused, which makes it difficult to accurat...

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Problems solved by technology

[0004] In view of the above problems, the present invention provides a high-strength Al-Zn-Mg-Cu-Ce-Y-Er-La-Sc deformed aluminum alloy and a preparation method thereof, by adding rare earth elements and blowing rare earth alloy powder with helium gas to thereby Achieve good composition homogeneity, effectively solve the problem of insufficient performance and product defects of traditional Al-Zn-Mg-Cu alloy

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