A high-performance trapezoidal aluminum alloy material and its production method

Abstract

The invention discloses a high-performance trapezoidal aluminum alloy material, the composition of which is: silicon Si 7.4-7.5%, iron Fe≤0.12%, copper Cu0.42-0.46, magnesium Mg0.4-0.45%, titanium Ti0. 1-0.15%, the total impurity content is <0.02%, and the balance is aluminum. The production method is as follows: add cold material with the same composition, the ratio is 15-20% of the capacity of the melting furnace, then add the electrolytic aluminum liquid ingredients, through electromagnetic stirring treatment to achieve uniform composition of the aluminum liquid, add alloy materials in turn, through refining, degassing box, The pure aluminum solution is obtained from the filter box, and the horizontal casting is achieved through the balance adjustment. The adjustment amount of the aluminum liquid matches the speed of the casting machine, and the cooling method, cooling water flow and pressure are reasonably distributed, forming a process from liquid to crystallization in the cooling area of ​​the crystallizer. The best condition, to ensure the grain size of the trapezoidal aluminum alloy. The product of the invention has uniform composition, high strength, fine grain size, first-class pinhole degree, low hydrogen content and few impurities, and comprehensively improves the mechanical properties of the alloy product.

Description

[0001] 1. Technical field: [0002] The invention relates to a composition of a high-performance trapezoidal aluminum alloy material and a production method thereof, which are widely used in the production of materials for automobile hubs, through refining, degassing, filtering, horizontal casting and Candinius-Propez The advanced cooling process of the casting unit can effectively improve the strength and performance stability of the product, so that the product has the advantages of bright surface, fine grain size, first-class pinhole degree, and low hydrogen content. [0003] 2. Background technology: [0004] At present, the cast aluminum alloy products used in the wheel hub industry have defects such as many pinholes, uneven composition and performance, and internal looseness. The unstable quality cannot meet the qualified industry standards, resulting in coarse grains, pinholes, and many impurities in the finished product. Defects greatly reduce the strength and service l...

AI Technical Summary

Problems solved by technology

[0004] At present, the cast aluminum alloy products used in the wheel hub industry have defects such as many pinholes, uneven composition and performance, and internal looseness. The unstable quality cannot meet the qualified industry standards, resulting in coarse grains, pinholes, and many impurities in the finished product. Defects, which greatly reduce the strength and service life of the hub