Повышение прочностных и трибологических характеристик поверхностных слоев аустенитной нержавеющей стали методом фрикционной обработки

Abstract

Influence of frictional treatment process parameters on microhardness and roughness of stainless austenitic steel surface was investigated. Influence of frictional action multiplicity on steel surface phase composition and me-chanical characteristics was studied. Structure and tribological properties under adhesive wear and boundary friction conditions of austenitic steel surface layer subjected to frictional treatment were investigated. The advantage of usage of synthetic diamond indenter and argon noncorrosive atmosphere was established. It was demonstrated that increase of frictional action multiplicity leads to rise of austenite deformation transformation completeness in the steel surface layer, strength properties and elastic and plastic deformation resistance as well as hardened layer depth. Formation of fragmented submicrocrystalline and nanocrystalline martensitic-austenitic structures in investigated steel surface layer subjected to frictional treatment was established. Frictional treatment provides the increase of wear resistance under boundary friction conditions and essential reduction of wear rate and friction coefficient under adhesive wear condi-tions.