INCREASE OF WEAR RESISTANCE OF METASTABLE AUSTENITE Cr-Mn-N STEEL DIFFUSION BORIDE COATINGS IN CONDITIONS OF ACTION THE EXTERNAL MAGNETIC FIELD
- 1 National Technical University of Ukraine "Kiev Polytechnic Institute", Kiev, Ukraine
- 2 The Frantsevich Institute for Problems of Materials Science of NAS of Ukraine, Kiev, Ukraine
Abstract
In this paper it was investigated the formation of complex boriding diffusion layers on metastable austenite Cr-Mn-N steel powder method. Defined phase and chemical composition, thickness, microhardness and wear resistance obtained by layers of metastable austenite Cr-Mn-N steel. It is established that the application of an external magnetic field (EMF) leads to a redistribution of the proportion boride phases in the surface layers of the crystal lattice period changes. EMF allows in 1.5 – 2 times to reduce the period of saturation details, microhardness diffusion boride coatings increase to 20,5 – 21 GPa and increase their wear resistance in 2.4 – 3 times compared to steel without protective coating. Boriding a magnetic field will increase the microhardness boride coatings 6 – 7 GPa compared to the boriding without application of a magnetic field.