CHARACTERISTIC FEATURES OF ALLOYING HSS-BASED DEFORMED COMPOUND POWDER MATERIALS WITH CONSIDERATION FOR TOOL SELF-ORGANIZATION A CUTTING .1. CHARACTERISTIC FEATURES OF WEAR IN HSS-BASED DEFORMED COMPOUND POWDER MATERIALS AT CUTTING

Characteristic features of wear in tools made of high-speed steel (HSS ) based deformed compound powder materials (DCPMs) were investigated a t cutting, It was shown that HSS-based powder tool materials additiona lly alloyed by titanium carbides feature an abnormally high wear resis tance and could be placed into a new class of self-organizing tool mat erials. In particular, DCPM-containing titanium carbide as a base and HSS as a binder can be classed with such materials, Self-organization of such materials is manifested in their ability to form stable high-s trength phases that effectively protect the surface from external impa cts at cutting. It was found using AES and SIMS methods, that during t he process of cutting one can observe the transformation of carbide Ti C into thin surface films in the form of titanium-oxygen compounds. Th is substantially enhanced frictional properties at operational tempera tures and significantly increased the cutting tool wear resistance. As a result, the wear resistance of this tool is 2.0-3.5 times higher th an that of usual high-speed steel tools. (C) 1997 Elsevier Science S.A .