Abstract:

The study was to investigate the effects of tool materials and experimental surroundings on diamond coated tool wear. It was expressed that diamond coated tools decreased tool wear with 25～45 percent, but diamond membrane was to some extent peeled off, hindering diamond coated tool from improving tool life with much higher extent. It was realized from the worn edge of tools that both chip solution and the mixed solution of hydrochloric acid and acetic acid did not corrode the diamond membrane, however etched the matrix composition. It might be convinced that the wear of diamond membrane resulted from "plastic deformation-crackle-particle peeling". The abrasive mechanism was mainly responsible for the tool wear of high speed steel in additional to the corrosion mechanism. The binder of cemented tungsten carbides was etched by chemical corrosion. In case the residual forces were not enough to hold the carbides, the carbides would disappear for abrading fatigue.

Key words: Diamond membrane, Tool materials, Wear, Carbides, Abrasion, Corrosive wear