Bionic coupling method for processing machinery parts by local laser melting and consolidation

Abstract

The invention relates to a manufacture technology of fatigue wear machinery parts used under the working conditions of thermal fatigue and abrasive wear, particularly relating to a bionic coupling method for processing machinery parts by local laser melting and consolidation, which adopts the following technical scheme: a bionic coupling unit is manufactured by simulating a coupling structure of an organism and using laser melting and consolidation to fill in a groove or a pit with various alloys and ceramic powder on the area of a friction surface with a certain thickness on the machinery part. The bionic coupling unit and a workpiece surface form a bionic coupling area simulating the organism surface, namely, a concave pit or a groove is processed on a sample surface according to the organism structure and is filled with various alloys and ceramic powder blended with binder, compacted and dried by air, and is subject to bionic coupling treatment by laser melting and consolidation. By using the method, the problems of fatigue property and abrasion resistance of the machinery part surface layer are effectively solved under the working condition of thermal shock or repeated friction.

Description

technical field [0001] The invention relates to the design, manufacture and processing technology of thermal fatigue resistance technology under the rapid cooling and rapid heating working conditions of mechanical parts, and relates to a method for improving the thermal fatigue life of parts. Background technique [0002] For components serving under rapid cooling, rapid heating or repeated friction conditions (such as car brake discs, truck brake hubs, train brake discs, glass molds, forging molds, die-casting molds, plastic molds, rolls for rolling various profiles, etc. ), the surface is repeatedly heated and expanded, cooled and contracted, and fatigue cracks are generated to cause component failure. Take the truck brake hub as an example. When various engineering vehicles brake, the great friction work is converted into heat energy and absorbed by the brake parts, causing the temperature of its working surface to rise rapidly (the maximum temperature can reach 600-700°C...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of fatigue resistance and wear resistance of the surface layer of mechanical parts under the conditions of rapid cooling, rapid heating or repeated friction, and propose a method for processing mechanical parts by laser local melting bionic coupling based on the principle of bionics