Aluminum alloy sheet for high-speed train structure and manufacture thereof

Abstract

The invention relates to an aluminum alloy sheet for a high-speed train structure and a manufacture thereof, in particular to an aluminum alloy sheet and a manufacture thereof. The sheet of the invention is prepared from the following elements: Zn, Mg, Mn, Cr, Zr, V, Cu, Si, Fe, Ti and Al. The preparation method comprises the following steps of: (1) weighting raw materials; (2) melting; (3) casting; (4) homogenized annealing; (5) hot rolling; (6) cold rolling; (7) quenching; and (8) one-stage ageing treatment. The aluminum alloy sheet for the high-speed train structure has the tensile strength of 410-425 Rm / N / mm<2>, the yield strength of 360-382 RP0.2 / N / mm<2> and the elongation rate of 12.2-13.4 percent.

Description

technical field [0001] The invention relates to an aluminum alloy plate and a manufacturing method thereof. Background technique [0002] 7N01 aluminum alloy belongs to the Al-Zn-Mg series aluminum alloy. Due to its high strength, good corrosion resistance and weldability, the alloy has excellent comprehensive performance. Japanese high-speed locomotives use this material more often. At present, there is no domestic manufacturer producing 7N01 aluminum alloy materials, and there is no molding production process for reference. Over the years, my country has conducted some research on medium-strength weldable Al-Zn-Mg alloys, but most of them are imitations, and have not yet formed a complete alloy system that can meet the manufacturing requirements of various high-speed trains. Al-Zn-Mg alloys There is still a lack of systematic research in terms of composition optimization, alloy metallurgy quality control, material processing and heat treatment, and many key technical probl...

AI Technical Summary

Problems solved by technology

Over the years, my country has conducted some research on medium-strength weldable Al-Zn-Mg alloys, but most of them are imitations, and have not yet formed a complete alloy system that can meet the manufacturing requirements of various high-speed trains. Al-Zn-Mg alloys There is still a lack of systematic research in terms of composition optimization, alloy metallurgy quality control, material processing and heat treatment, and many key technical problems have not been resolved. Therefore, it is difficult to provide high-performance medium-strength materials for my country's high-speed train manufacturing stably. Welding Al-Zn-Mg alloy sheet

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