AISI304 钢表面低电压等离子体基离子注入层摩擦磨损性能研究

AISI304 stainless steel samples were treated with nitrogen ions by high-frequency low-voltage plasma immersion ion implantation technique. The friction and wear behaviors of the modified layers on the steel surface were examined on a pin-on-disc test rig. The phase composition, the depth profile of nitrogen and the wear mechanisms of the modified layers were investigated by means of X-ray diffraction (XRD), Auger electron spectroscopy (AES), and scanning electron microscopy (SEM). The improvement of the friction and wear behaviors is greatly dependent on the treatment temperature. The modified laye treated at 400°C is considerably thicker than that at 300°C. The thicker modified layer containing expanded austenite phase in near-surface area accounts for the increase in the load-bearing capacity of the materials and leads to change in the friction mode. So that the friction coefficient is considerably decreased and the wear resistance increases by a factor of 2-10.