A magnetic field induced welding method

Abstract

The invention relates to a magnetic field induction welding method. The magnetic field induction welding method is characterized in that composite brazing filler metal containing magnetic metal powderis heated and melted, an orientation magnetic field consistent or roughly consistent with the main stress direction of a welding line is formed at the brazing part, and the magnetic metal powder in the composite brazing filler metal is arranged in the direction of the orientation magnetic field under the action of the orientation magnetic field and fixed. The magnetic metal powder is flaky and / orfiber-like nano powder. The magnetic field induction welding method has the beneficial effects and the technical effects that the composite magnetic metal powder in the brazing filler metal is arranged in the stress direction of the welding line under the action of the orientation magnetic field after brazing filler metal melting, and the effects of strengthening the welding line and improving the post-welding strength are achieved. Under the situation that base metal is ferromagnetism metal and paramagnetic metal, the base metal is magnetized under the action of the magnetic field, nano magnetic metal powder is adsorbed to the surface of the magnetized base metal, a broach-shaped structure is formed, and the P element in the brazing filler metal and brittle compounds formed on the surface of the base metal are reduced, an effective interface is formed, and the silver-copper-phosphorus brazing filler metal can be used for welding between black metals.

Description

technical field [0001] This application relates to a magnetic field induction welding method, which is mainly applicable to the brazing industry. Background technique [0002] In the brazing industry, the traditional silver-copper-phosphorus solder is widely used in the welding between copper and copper alloys because of its low cost, low melting temperature, and good spread on copper and copper alloys. However, because Cu3P in copper-phosphorus solder is a brittle phase, the brazing joint of copper-phosphorus solder does not have good mechanical properties, which leads to the fact that the welded parts cannot bear large mechanical loads. At the same time, when copper-phosphorus solder is used to weld ferrous metals, the P element on the contact surface between the solder and the base metal will form a brittle compound at the interface with the base metal, resulting in the inability to form an effective connection between the solder and the base metal. The above factors are ...

AI Technical Summary

Problems solved by technology

In this patent, the metal powder can play the role of dispersion strengthening, but the distribution of the metal powder in the weld is not controlled, and the microstructure of the powder cannot be used to further strengthen the effect.