High-speed rail train aluminum profile and preparation method thereof

Abstract

The invention discloses a high-speed rail train aluminum profile which comprises the following metals in percentage by mass: 0.1-0.2% of Cu, 0.20-0.40% of Mn, 1.0-2.0% of Mg, 0.1-0.3% of Cr, 4.0-6.0% of Zn, 0.1-0.2% of Zr, at most 0.10% of Ti, at most 0.30% of Fe, at most 0.35% of Si, at most 0.1% of V, at most 0.15% of all impurities, and the balance of Al. The invention also discloses a preparation method of the high-speed rail train aluminum profile. The high-speed rail train aluminum profile has obvious higher yield strength, tensile strength, elongation percentage and the like than the existing aluminum alloy.

Description

technical field

[0001] The invention relates to an aluminum profile, in particular to an aluminum profile with ultra-high strength, high toughness and high corrosion resistance for high-speed rail car bodies. Background technique

[0002] With the rapid development of the transportation industry, the application of lightweight aluminum alloys in high-speed train body materials, although superhard aluminum alloys have light weight, high specific strength, easy processing, good corrosion resistance, and low cost Low-level advantages, but due to the existing alloy and raw material selection and production process, although the material strength is high, the fracture toughness and stress corrosion resistance cannot meet the needs of the car body market for high-strength, high-toughness, and high-corrosion-resistant materials. The main structural materials still rely on imports, which greatly restricts the development of my country's rail transit industry. Using aluminum alloy as ...