Method for brazing super-hard abrasive by using active aluminum-silicon alloy binding agent

Abstract

The invention discloses a method for brazing a super-hard abrasive by using an active aluminum-silicon alloy binding agent; an active aluminum-silicon alloy is used as the binding agent of the super-hard abrasive and a tool matrix; and the active aluminum-silicon alloy binding agent comprises the following elementary compositions in percentage by weight: 0-30% of Si, 0.25-6% of Ti, 0-0.5% of Mg, 0-5% of Cu, 0-0.5% of Ga, 0-0.5% of Ce, 0-0.5% of Sr, 0-0. 5% of Na and the balance of Al and inevitable impurities; the active aluminum-silicon alloy binding agent is coated on the tool matrix, and then the super-hard abrasive is arranged on the surface of the active aluminum-silicon alloy binding agent, and finally the brazed connection of the super-hard abrasive and the tool matrix can be realized through heating the heating equipment according to a certain brazing process under a certain atmosphere. When the super-hard abrasive is brazed by using this method, the super-hard abrasive can befirmly welded; the welding at a relatively low temperature can be realized, so the thermal damage during a welding process is reduced; and the service life of the super-hard abrasive tool is prolonged.

Description

technical field [0001] The invention relates to the technical field of brazing superhard abrasive tools, in particular to a method for brazing superhard abrasives with an active aluminum-silicon alloy binder. Background technique [0002] Superabrasives usually refer to diamond abrasives and cubic boron nitride abrasives. Due to the high strength and hardness of superabrasives, they are often manufactured into various superabrasive tools to process hard and brittle materials such as stone, ceramics, and cemented carbide. At present, superabrasive tools using metal as a binder are prepared, and the connection between superabrasives and tool substrates is mainly achieved by means of electroplating, sintering, and brazing. For electroplated superabrasive tools, the consolidation method of superabrasives is mechanical wrapping, the bonding force of abrasives is weak, and it is easy to fall off and fail, and the superabrasives are disordered, with low exposure height and small c...

AI Technical Summary

Problems solved by technology

In addition, the brazing temperature of the mainstream solder system used for welding superhard abrasives is generally high; high brazing temperature will not only damage the mechanical properties of the diamond itself, but also cause high residual stress, which are not suitable for preparing brazing Welding superabrasive tools desired

There are not many choices of metal bonds suitable for brazing superabrasives on the market, especially for low temperature brazing superabrasives