Stationary wave restrained large-area hard alloy soldering method and special equipment

Abstract

The invention discloses a stationary wave restrained large-area hard alloy soldering method, which is characterized in that special soldering equipment with a stationary wave generating device is used, first, after a solder is placed in a crucible for being fused, stationary waves are formed on the surface of the fused solder by the stationary wave generating device, after a to-be-soldered hard alloy piece is contacted with the wave crest on the surface of the fused solder, and the solder forms regular dotted or strip distribution on the to-be-soldered surface of the hard alloy, and then is connected with a metallic matrix to form discontinuous solder joints or strip soldering seams in regular distribution on a soldering interface between the hard alloy piece and the metallic matrix. The invention also discloses the special soldering equipment used in the method. The soldering method has the beneficial effects that a stress line accumulated on the soldering interface of the hard alloy is cut off, the stress of the soldering joint of the hard alloy is released, the cracking risk of a hard alloy tool during soldering is eliminated, and a new method is provided for solving the problem of overlarge stress due to soldering two large-area metals with different coefficients of thermal expansion.

Description

technical field [0001] The invention relates to the field of brazing technology, in particular to a large-area cemented carbide brazing method constrained by standing waves, and also relates to special equipment used in the brazing method. Background technique [0002] Cemented carbide tools play a pivotal role in modern industry due to their high hardness and high wear resistance, but due to the high price of its main constituent element - tungsten and the lack of toughness of cemented carbide itself, cemented carbide tools are common The most common form is to only embed a hard alloy block on the effective working part of the workpiece, and the hard alloy block and the metal substrate are connected as a whole through the brazing technology of dissimilar metals. For the brazing connection of dissimilar metals, especially the connection between cemented carbide and ordinary metals, due to the large difference in thermal expansion coefficient between the two, there is a larg...

AI Technical Summary

Problems solved by technology

For the brazing connection of dissimilar metals, especially the connection between cemented carbide and ordinary metals, due to the large difference in thermal expansion coefficient between the two, there is a large stress on the workpiece at the brazing interface, which can seriously cause cemented carbide Cracking, workpiece scrapping

Images