Friction and Wear Characteristics of 316L Stainless Steel Implanted with Nitrogen at Elevated Temperature
316L不锈钢氮离子注入层的高温摩擦磨损特性

The microstructure and tribological properties of 316L stainlesssteel implanted with nitrogen at elevated temperature have been investigated. As the results, the depth of the N-containing layer of 316L stainless steel implanted at elevated temperature is nearly 11 times of that implanted at ambient temperature. The N-containing layer of about 40 nm thick on the stainless steel surface implanted from 150 ℃ to 460 ℃ is mainly composed of expanding austenite that strengthens the surface layer. Thus the microhardness and wear resistance of the surface layer of stainless steel implanted from 150 ℃ to 460 ℃increases significantly, while the friction coefficient in dry sliding decreases greatly. Though the friction coefficient for the specimen implanted at 460 ℃ is a little bit higher than that implanted at 150 ℃, the former shows higher wear resistance due to the formation of a strengthening layer over 2 μm thick.