Increasing of wear resistance of machine parts by nitriding while suppressing of nitride mesh formation process

Abstract

The article discusses the technology of nitriding machine parts made of alloy steels, which provides suppression of the nitride mesh formation process as a result of preliminary two-stage preparation of the surface layer for nitriding, including obtaining a surface layer of a material with an ulramelkodisperse structure followed by high-energy implantation with nitrogen ions. Comparative models of the formation of nitrided layers obtained with traditional and proposed nitriding methods, as well as models of wear under conditions of friction of the surfaces of parts, are proposed. The results of comparative wear tests of alloy steels with a nitrided layer used for the manufacture of machine parts operating under conditions of wear friction are presented. It is shown that the absence of a nitride mesh in the nitrided layer increases the wear resistance of the nitrided layer by approximately 3—4 times.