Increasing the Wear Resistance of CrWMn Tool Steel Surfaces by Plasma Electrolytic Nitriding and Polishing
Source abstract
Abstract
The positive effect of plasma electrolytic treatment on CrWMn tool steel to increase the wear resistance of its surface is shown. The effect of plasma electrolytic nitriding and subsequent polishing on the structure, phase and elemental composition, microhardness of the surface layer, and surface morphology is established. Steel nitriding leads to the formation of a modified surface layer including Fe2–3N iron nitride and nitrogen martensite, below which hardening martensite is formed, reaching a microhardness value of 1200 HV. Subsequent polishing leads to a decrease in surface roughness by 42–68%. Tribological tests were carried out according to the shaft-bushing scheme. A decrease in the friction coefficient and weight wear of up to 2.6 and 30.1 times, respectively, is shown. The formed structure of the surface layer compensates for the effect of the counter body and determines the destruction of friction bonds by plastic displacement. The wear mechanism has been established and is defined as fatigue wear under dry friction and plastic contact.
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Research context
OpenAlex topics: Metal and Thin Film Mechanics · Surface Treatment and Coatings · Advanced materials and composites
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of High-Efficiency Processing Technologies, Moscow State University of Technology “STANKIN”, 127994 Moscow, Russia
Department of Mathematical and Natural Sciences, Kostroma State University, 156005 Kostroma, Russia
Funding
state assignment of the Ministry of Science and Higher Education of the Russian Federation
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