An aluminum-copper alloy welding wire suitable for wire additive manufacturing

Abstract

The invention discloses an aluminum-copper alloy welding wire suitable for wire material additive manufacturing. In terms of mass percentage: manganese Mn: 0.3-0.5%, copper Cu: 4.6-5.3%, titanium Ti: 0.15-0.35%, boron B: 0.0005‑0.006%, Vanadium V: 0.05‑0.3%, Zirconium Zr: 0.05‑0.2%, Tin Sn: 0.05‑0.2%, Iron Fe: ≤0.15%, Silicon Si: ≤0.06%, Magnesium Mg: ≤0.05%, Zinc Zn: ≤0.1%, other individual impurity elements: ≤0.05%, other impurity elements total: ≤0.15%, and the balance is aluminum Al. The welding wire of the present invention has no toxic smoke and dust generated during production and use, has a uniform microstructure of the additively formed accumulation body, has high strength and toughness mechanical properties and is uniform in the horizontal and vertical directions, and has no toxic metal oxides on the surface.

Description

technical field [0001] The invention belongs to the field of metal materials, and in particular relates to an aluminum-copper alloy welding wire suitable for wire material additive manufacturing. Background technique [0002] Al-Cu alloys have good specific strength and good toughness, and are widely used in military and aerospace fields. At present, several grades of high-strength Al-Cu alloys have been developed, such as 2319, 2519, 2024, ZL204A, ZL205A, etc. Deformed aluminum-copper alloys are difficult to achieve equal strength matching in the tailor welding process. Cast aluminum-copper alloys also have a wide crystallization temperature range, poor casting performance, difficult to achieve sequential solidification, and high wall thickness sensitivity, which is prone to loosening, thermal cracking, Casting defects such as oxidized slag inclusions. These problems limit the application range of Al-Cu alloy. Cranfield University in the United Kingdom has made great pro...

AI Technical Summary

Problems solved by technology

However, cast aluminum alloys such as ZL204A and ZL205A, due to the alloy element Cd with low vapor pressure, are severely burned during the printing process, and a layer of Cd oxide is attached to the surface of the accumulation. This substance is toxic, so this alloy cannot be used. Wire Additive Manufacturing Process

At present, no high-strength and tough aluminum alloy welding wire suitable for wire additive manufacturing has been reported.

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