冷变形对00Cr18Mn15Mo2N0.9高氮无镍不锈钢摩擦磨损性能的影响

he cold rolling with different reduction degrees for a new type high- nitrogen nickel- free stainless steel was conducted, then the cold deformation performance and its effect on the friction wear property for the steel were studied. The results showed that the microstructure of the steel was stable and there was no strain-induced martensite even by the maximum deformation of 60%. As the cold deformation increased, the strength and hardness of the steel increased rapidly while the elongation and workhardening exponent decreased gradually. There existed a trend that the wear rate of the steel decreased firstly and then increased with the increasing cold deformation, whilst, the best wear resistance can be achieved by 20% cold deformation for the loads of 2 N and 5 N, and by 40% cold deformation for 10 N, respectively. Moreover, the main wear mechanism of the high- nitrogen nickel- free stainless steel changed from abrasive wear, oxidation wear and brittle flaking to abrasive wear and brittle flaking with the increasing cold deformation and load.