Soldering wire for high-strength aluminum copper alloy

Abstract

The invention belongs to the field of material science and engineering, and its chemical composition is as follows: (wt%): Cu 5.8~6.8, Mn 0.2~0.4, Ti 0.05~0.2, Zr 0.05~0.25, V 0.01~0.20, Cr 0.01~0.25, Fe 0.15, Si 0.08, Zn 0.05, Mg 0.02, and the balance is Al; the welding wire is refined by traditional melting and casting process according to the formula. The invention satisfies the manufacturing problem of high-strength aluminum-copper alloy matched welding wire by controlling the components. The welding wire of the invention has low sensitivity to welding cracks, small weld seam porosity sensitivity, and excellent joint mechanical properties.

Description

technical field [0001] The invention relates to a new welding material, which belongs to the field of material science and engineering. Background technique [0002] High-strength aluminum-copper alloys are widely used in the aerospace industry. They are the preferred materials for aircraft fuel tanks and rocket storage tanks. Similar materials abroad have been widely used in the manufacture of aircraft fuel tanks and rocket storage tanks. The application of domestic high-strength aluminum-copper alloys is relatively lagging behind. In recent years, with the development of the aerospace industry, the application of high-strength aluminum-copper alloys has been put on the agenda. However, the application of high-strength aluminum-copper alloys is inseparable from welding technology. With the development of welding wire. The same kind of high-strength aluminum-copper alloys in foreign countries have matured matching welding wires-aluminum-copper series welding wires, which ha...

AI Technical Summary

Problems solved by technology

The application of high-strength aluminum-copper alloys in China is relatively lagging behind. In recent years, with the development of the aerospace industry, the application of high-strength aluminum-copper alloys has been put on the agenda. However, the application of high-strength aluminum-copper alloys is inseparable from welding technology. Problems in the development of matching welding wire

The same kind of high-strength aluminum-copper alloys in foreign countries have matured matching welding wires-aluminum-copper series welding wires, which have been used in foreign aerospace industries for many years. American aluminum-copper series welding wires are used for welding. The mechanical properties of the welded joints meet the design requirements. The existing problems are Weld seam porosity is more sensitive

There are aluminum-copper welding wires suitable for use at room temperature in China, but their low-temperature performance is poor

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