Method and device for performing electric magnetization arc welding-braze welding compounding on dissimilar materials

Abstract

The invention discloses a method and a device for performing electric magnetization resistance welding-braze welding compounding on dissimilar materials. In the process of performing arc welding-braze welding on the dissimilar metal material, a brazed liquid solder molten pool is subjected to the reinforced booster action of electromagnetic stirring and electric magnetization by using the characteristic that a magnet exciting coil generates an external applied alternating magnetic field in a welding area to control a welding arc so as to promote ordered flow of the liquid solder, and rupture of membranes, wetting, spreading and diffusion of the liquid solder on the surface of the metal material with a higher melting point, promote the liquid solder and a base metal which is molten by the metal material with a lower melting point to be mixed fully, improve uniformity of compositions of a soldered seam, reduce the weld defects, optimize the compositions and the performance of the soldered seam, and improve the soldered joint; and the device has the advantages of simple structure, flexible application, lower cost, good effect, and easy implementation.

Description

technical field [0001] The invention relates to a compound method and equipment for electromagnetically excited arc melting and brazing of dissimilar materials. Background technique [0002] With the emergence and application of new materials, the difference in weldability of different materials is also increasing. It is difficult to connect dissimilar metals with large performance differences by ordinary welding methods. Arc brazing is a new type of brazing process that uses an arc as a heat source. During brazing, the arc is ignited between the electrode and the workpiece, and an inert gas is used for protection. The welding wire with a melting point lower than the base metal is used as the welding material (brazing Material), the welding wire (brazing material) melts but the base metal does not melt during welding, and the connection between the same or dissimilar metal materials can be realized. [0003] Arc melting brazing technology is evolved on the basis of arc braz...

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to solve the problem that the existing arc melting-brazing technology is not conducive to the uniform mixing of liquid molten pool metal and its full spread on the surface of the base metal and mutual diffusion with the base metal due to the small heat input. A simple electromagnetic excitation 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 on the base metal with a higher melting point. Spreading and diffusion, 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 Additional equipment is simple, easy to implement, and widely applicable

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