High-performance automobile die casting aluminum alloy material and preparation method thereof

Abstract

The invention discloses a high-performance automobile die casting aluminum alloy material and a preparation method thereof. The high-performance automobile die casting aluminum alloy material comprises the following components of, by mass, 8%-9% of Si, 0.5%-0.8% of Fe, Cu 3.2%-3.8% of Cu, 0.15%-0.40% of Mn, less than or equal to 0.3% of Mg, less than or equal to 1.5% of Zn, 0.008%-0.02% of Sr, less than or equal to 0.05% of other single impurity element, less than or equal to 0.15% of impurity element total amount, and 84.2%-88.1% of Al. The preparation method of the high-performance automobile die casting aluminum alloy material comprises the following steps of material preparation, smelting, alloying, cooling and component adjustment, refining, standing and modification. According to thehigh-performance automobile die casting aluminum alloy material and the preparation method thereof, the composition proportion of the aluminum alloy material is optimized, so that die casting production is facilitated, sufficient strength is achieved so as to meet load requirements of an automobile die casting, and wide applicability is achieved.

Description

technical field [0001] The invention relates to an aluminum alloy material and a preparation method thereof, in particular to a high-performance automobile die-casting aluminum alloy material and a preparation method thereof, belonging to the technical field of aluminum alloy materials. Background technique [0002] With the extensive application of aluminum alloy materials in various aspects of the automobile manufacturing industry, the demand for aluminum alloys in the world, especially in China, is increasing. The development of the modern die-casting industry also requires the market to provide more and more high-quality products. Aluminum alloy casting materials for automobiles have been widely used in Europe, America, Japan and other developed countries in the world, especially in the automobile industry. The amount of aluminum used for each car in foreign countries reaches 140Kg, while the amount of aluminum used for each car in China It is only about 60Kg. The domest...

AI Technical Summary

Problems solved by technology

At present, most manufacturers at home and abroad use raw aluminum ingots and increase the corresponding required alloy elements for production, which costs a lot and the quality is not very stable.

In addition, foreign aluminum alloy production technology, equipment and other technologies are relatively confidential, and it is still relatively difficult to fully master the technology in China.

However, the current die-casting aluminum alloys have incomparable defects in die-castability and mechanical strength, which seriously affects the application of aluminum alloy die-castings in load-bearing parts such as automobiles.