Wear resistance of high-nitrogen nonmagnetic chromium-manganese steels

Wear resistance of high-nitrogen (1%N) austenitic steels containing 10% Mn, 25% Cr and various amounts of silicon and vanadium has been studied. Tests for abrasive wear resistance has been made using friction machine for high contact pressures (62 kg/mm2). Bench tests under conditions of rolling friction have been carried out during rotation in opposite directions of a pair of rollers for 40 hrs and the wear has been determined according to the weight loss. It has been established that the increase of wear resistance of the studied high-nitrogen austenitic steels is achieved at the expense of their high solid solution and strain strengthening without formation of deformation martensite. According to wear resistance high-nitrogen (approximately 1% N) chromium-manganese steels with silicon under conditions of abrasive wear are no worse and under conditions of rolling friction are considerably better than nitrided ferromagnetic steel 38KhMYuA and nonmagnetic ageing steel EhP-769