Electromagnetic excited TIG arc melting-brazing hybrid welding method and equipment

Abstract

The invention discloses an electromagnetic excited TIG arc melting-brazing hybrid welding method and equipment. In addition to the use of the welding zone, an alternating magnetic field is added to control properties of a welding arc, and the assistant effect on the melting bath of the liquid-state brazing filler metal for arc melting-brazing is realized through electromagnetic stirring and excitation and enhancement, thereby promoting the orderly flow of the liquid-state brazing filler metal and the rupture, wetting, spreading and proliferation of the liquid-state brazing filler metal on the surface of the high metal material, improving the full mixing of the liquid-state brazing filler metal and the base metal formed by melting the low-melting-point metal material, improving the uniformity of the components of the brazed weld, reducing welding defects, increasing the welding speed, improving the weld formation, optimizing the structure and performance of the brazed weld, and improving the quality of the brazed joint. Moreover, the equipment has the advantages of simple structure, flexible application, low cost, good effect and easy realization.

Description

technical field [0001] The invention relates to the field of brazing, in particular to an electromagnetic excitation TIG arc melting-brazing composite welding method and equipment assisted by an external magnetic field. Background technique [0002] Non-melting inert gas shielded arc melting-brazing is a new type of brazing process with TIG arc as the heat source. Ignite between the workpieces, use inert gas for protection, use welding wire with a melting point lower than the base metal as the welding material (brazing filler metal), the welding wire (brazing filler metal) melts during welding and the base metal part or does not melt, to achieve the same or different metals The connection between materials; In 2000, the Ukrainian Barton Welding Institute and the Ukrainian University of Marine Technology invented the TIG argon arc brazing nickel-based alloy process, and carried out arc brazing repair technology research on nickel-based alloy blades; Germany, the United States...

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to solve the problem that the existing TIG arc melting-brazing technology is not conducive to the uniform mixing of liquid molten pool metal and its sufficient spreading on the surface of the base metal and mutual diffusion with the base metal. The device generates a magnetic field in the welding area to affect the characteristics of the welding arc, and performs auxiliary electromagnetic stirring and electromagnetic excitation on the liquid solder pool, thereby promoting the flow of liquid solder and wetting, spreading and diffusion on the base material with a higher melting point. Promote the full and uniform mixing of the liquid solder and the melting part of the base metal with a lower melting point, improve the uniformity of the solder joint composition, reduce welding defects, optimize the structure and performance of the solder joint, and improve the quality of the arc melting brazing connection; the method has simple additional equipment, Easy to implement and widely applicable

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