High-strength and high-conductivity wrought aluminum alloy and preparation method thereof

Abstract

The invention discloses a high-strength and high-conductivity wrought aluminum alloy. The wrought aluminum alloy comprises the following alloy elements: 0.3 to 0.8% of Mg; 0.2 to 0.6% of Si; 0.1 to 0.3% of Fe; 0.2 to 0.5% of Ni; 0.05 to 0.3% of Cu; 0.05 to 0.2% of B; and the balance of Al. The invention further discloses a preparation method of the high-strength and high-conductivity wrought aluminum alloy. The preparation method comprises the specific steps of pure aluminum melting, basic alloying treatment, melt modification treatment, sub-rapid solidification, rolling plastic forming and solid solution-ageing heat treatment, the preparation process is simple, the cost is low, and the comprehensive performance is excellent. According to the method, the Ni element is adopted to improve the morphology and distribution of an iron-rich phase, precipitation of an Mg2Si phase is promoted, and the strengthening effect of the Mg2Si phase is achieved. According to the high-strength and high-conductivity wrought aluminum alloy, the defects are eliminated and the structure is improved by adopting sub-rapid solidification, rolling treatment and solid solution-ageing treatment, the mechanical property and the conductivity of the alloy are improved, the problem that the conductivity and the mechanical property in the alloy are mutually impeded is solved, and the high-strength and high-conductivity wrought aluminum alloy is obtained.

Description

technical field

[0001] The invention relates to the technical field of deformed aluminum alloys, in particular to a deformed aluminum alloy with high strength and high electrical conductivity and a preparation method thereof. Background technique

[0002] With the rapid development of power transmission technology, the requirements for the mechanical and conductive properties of conductive materials in the field of power transmission are also getting higher and higher. However, for the existing metal conductive materials, due to the influence of the metal's own strength and the microscopic mechanism of conductivity, the metal strength and conductivity are mutually restricted, that is, the better the strengthening effect, the lower the conductivity.

[0003] The main strengthening mechanisms of metal materials include: solid solution strengthening, deformation strengthening, fine grain strengthening and second phase strengthening. According to the microscopic mechanism of me...

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