Влияние ионно-плазменной поверхностной обработки на фазовый состав и нанотвердость упрочненного слоя аустенитной нержавеющей стали

Abstract

Phase composition and a nanohardness of the surface layers of austenitic stainless steel with grainsubgrain and coarse-grain structures subjected to ion-plasma treatment were investigated. Ion-plasma treatment of steel specimens facilitates a surface hardening and formation of inhomogeneous surface layer ≈ 18-25 µm in thickness. The differences in the initial structure of the steel and subsequent ion-plasma hardening affect the nanohardness characteristics of the surface layers. The surface layers of the specimens underwent phase transformations and changed phase composition from austenite to expanded austenite+carbonitrides+ferrite under ion-plasma treatment.