High-strength and high-toughness aluminum alloy wheel die forging and preparation method thereof

Abstract

The invention belongs to the technical field of alloy materials, and particularly relates to a high-strength and high-toughness aluminum alloy wheel die forging and a preparation method thereof. The high-strength and high-toughness aluminum alloy wheel die forging is composed of the following elements in percentage by mass: 0.78 percent to 0.84 percent of Si, 1.18 percent to 1.24 percent of Mg, 0.38 percent to 0.42 percent of Cu, 0.20 percent to 0.25 percent of Fe, 0.12 percent to 0.15 percent of Mn, 0.23 percent to 0.26 percent of Cr, 0.01 percent to 0.05 percent of Ti, 0.01 percent to 0.03 percent of Sc and the balance Al. According to the high-strength and high-toughness aluminum alloy wheel die forging and the preparation method thereof provided by the invention, by optimizing alloy components, assisting in adding silicon nitride powder and adopting the optimized aluminum bar heating process, solid solution process and aging process after die forging, the comprehensive performancerequirement of the aluminum alloy die forging is met, and the prepared aluminum alloy die forging is good in surface quality, good in performance of finished forgings in industrial production and excellent in comprehensive mechanical property.

Description

technical field [0001] The invention belongs to the technical field of alloy materials, and in particular relates to a high-strength and high-toughness aluminum alloy wheel die forging and a preparation method thereof. Background technique [0002] High-strength aluminum alloy has the characteristics of low density, high strength, good processing performance and good welding performance, and is widely used in aerospace, aviation industry and civil industry and other fields. Especially in the aviation industry, it occupies a very important position and is one of the main structural materials in the aerospace industry. At present, the aluminum alloys commonly used for automobile aluminum alloy wheels on the market include Al-Mg-Si 6061 alloy, which has average strength and toughness; A356 alloy, which has poor strength and toughness, cannot solve the problem of high strength and high toughness, and cannot meet the needs of the military field. Requirements for high strength, h...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problem that the current aluminum alloy die-forged wheel cannot have high strength and high toughness at the same time, so that it cannot meet the technical problem of high strength, high toughness, corrosion resistance and light weight of aluminum alloy materials in the military field, and provides a kind of High-strength and high-toughness aluminum alloy wheel die forgings