一种铝锂合金焊前表面处理工艺方法

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一种铝锂合金焊前表面处理工艺方法

本发明涉及5A90铝锂合金材料焊接前对焊丝及母材的表面处理工艺。所要解决的技术问题是提供一种铝锂合金焊前表面处理工艺方法，用于去除5A90铝锂合金工件及焊丝表面的各种污物、氧化膜和腐蚀物，解决铝锂合金焊接过程中气孔问题，确保铝锂合金顺利应用于结构件上。本发明在两方面采取工艺措施：1、去除工件表面的各种污物、氧化膜和腐蚀物，对工件做相应去油、化学浸蚀和机械清理。2、去除焊丝表面的各种污物、氧化膜和腐蚀物，对焊丝进行化学清洗。本发明通过对工件做相应去油、化学浸蚀和机械清理以及对焊丝进行化学清洗这两方面采取的有效工艺措施，能去除工件及焊丝表面的各种污物、氧化膜和腐蚀物，解决铝锂合金焊接过程中气孔问题。

Technicalmethod for surface treatment before welding of aluminum-lithium alloy

Theinvention relates to a technique for surface treatment of a welding wire or a basemateral before welding of a 5A90 aluminum-lithium alloy material. A technicalmethod for surface treatment before welding of an aluminum-lithium alloy isused for removing various contaminants, oxidation films and corrosives on thesurfaces of a 5A90 aluminum-lithium alloy workpiece and a welding wire, solvingthe air pore problem in the aluminum-lithium alloy welding process andguaranteeing that an aluminum-lithium alloy is applied to a structural membersuccessfully.The technical method comprises technical measures adopted in the two aspectsthat 1, the various contaminants, the oxidation films and the corrosives on thesurface of the workpiece are removed, and the workpiece is deoiled, chemicallyetched and mechanically cleared correspondingly; and 2, the variouscontaminants, the oxidation films and the corrosives on the surface of thewelding wire are removed, and the welding wire is chemically cleaned. Throughthe effective technical measures adopted in the two aspects that the workpieceis deoiled, chemically etched and mechanically cleared correspondingly and thewelding wire is chemically cleaned, the various contaminants, the oxidationfilms and the corrosives on the surfaces of the workpiece and the welding wirecan be removed, and the air pore problem in the aluminum-lithium alloy weldingprocess is solved.