On characteristic features of alloying HSS-based deformed compound powder materials with consideration for tool self-organization at cutting 2. Cutting tool friction control due to the alloying of the HSS-based deformed compound powder material

Some approaches to friction control by alloying of new generation powder tool materials (high-speed steel (HSS) based deformed compound powder materials or DCPMs) are suggested. The first way implies reduction of self-organization level thanks to a decrease of friction coefficient at the operating temperatures. The second is realized by the addition of 5% Al2O3. On the basis of modem tribology conclusions the extension of the interval of self-organization by means of stable high-strength secondary structure developing on the tool surface is advanced as the second principal of alloying. This is implemented by employing a 2% BN (hexagonal) addition. Application of both approaches makes it possible to expect a significant total increase of tool life. This is realized by using a 20% TiCN addition. (C) 1998 Elsevier Science S.A.