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 at cutting, It was shown that HSS-based powder tool materials additionally alloyed by titanium carbides feature an abnormally high wear resistance and could be placed into a new class of self-organizing tool materials. 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-strength phases that effectively protect the surface from external impacts at cutting. It was found using AES and SIMS methods, that during the process of cutting one can observe the transformation of carbide TiC into thin surface films in the form of titanium-oxygen compounds. This substantially enhanced frictional properties at operational temperatures and significantly increased the cutting tool wear resistance. As a result, the wear resistance of this tool is 2.0-3.5 times higher than that of usual high-speed steel tools. (C) 1997 Elsevier Science S.A.