Method for friction stir welding of high-strength aluminum alloy

A friction stir welding and aluminum alloy technology, which is applied in welding equipment, non-electric welding equipment, metal processing equipment, etc., can solve the problems of difficult to accurately control the heating and cooling process, inability to apply large structural parts, and complicated processing processes. The effect is stable and reliable, saving processing time and reducing the effect of the processing process

Inactive Publication Date: 2018-02-23
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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Problems solved by technology

However, the heat treatment process will be limited by equipment, large structural parts cannot be used, and the treatment process is more complicated, the treatment time is longer, and the heating and cooling process is difficult to accurately control, so this treatment method has great instability.

Method used

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  • Method for friction stir welding of high-strength aluminum alloy
  • Method for friction stir welding of high-strength aluminum alloy
  • Method for friction stir welding of high-strength aluminum alloy

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Embodiment 1

[0030] Such as figure 1 As shown, a high-strength aluminum alloy friction stir welding method is used to process the 6mm thick 2219 high-strength aluminum alloy welded joints, which specifically includes: 4 pairs of high-strength aluminum alloy parts to be welded in the friction stir welding equipment 4 While the friction stir welding is being performed, the spray gun 5 of the cold spray equipment performs cold spray treatment on the welded part 2 synchronously, thereby forming a cold spray coating 3 at the welded joint of high-strength aluminum alloy.

[0031] Specifically, the stirring head 4 of the friction stir welding equipment and the spraying gun 5 of the cold spraying equipment are located on the same side of the high-strength aluminum alloy to be welded 1, the two are fixed together and the spraying gun 5 of the cold spraying equipment is located at the temperature behind the stirring head 4 The field is 400°C, and the two move synchronously, realizing the cold spray ...

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Abstract

The invention discloses a method for friction stir welding of high-strength aluminum alloy. A finished welding part is subjected to cold spraying treatment synchronously while a high-strength to-be-welded aluminum alloy part is subjected to friction stir welding, and thus a cold spraying layer is formed at the position of a high-strength aluminum alloy welding joint. The method for friction stir welding of the high-strength aluminum alloy not only can improve stress corrosion resistance of the friction stir welding joint conveniently and effectively and prolong service life of the friction stir welding joint, but also can reduce treatment process, improve treatment efficiency and save treatment time, and is stable and reliable in treatment effect, economical and practical.

Description

technical field [0001] The present invention relates to the technical field of metal material connection, in particular to the stirring of a high-strength aluminum alloy (the high-strength aluminum alloy refers to an aluminum alloy whose tensile strength is not less than 600MPa at room temperature and not less than 280MPa at 250°C) friction welding method. Background technique [0002] Friction Stir Welding (FSW) uses a special form of stirring head to advance while rotating, and generates heat through the friction between the stirring head and the workpiece. The friction heat makes the metal in this part in a thermoplastic state, and the pressure of the stirring head Under the action, it flows plastically from the front to the rear, so that the parts to be welded are pressure-welded as a whole. Compared with traditional welding methods, friction stir welding has the advantages of high joint quality, small welding deformation, small residual stress, and no pollution in the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K20/12B23K103/10
CPCB23K20/1205B23K20/1245B23K2103/10
Inventor 张华赵常宇崔冰常志龙邵童阁
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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