离子渗氮是将金属零件置于活性氮介质中,在一定温度和时间下,使氮元素渗入工件表层,从而改变金属表层的化学成分,使之具有更高的耐磨性、疲劳强度、抗腐蚀能力及抗烧伤性等的一种表面改性工艺[1]。氮离子首先是在电压的作用下高速运动注入工件表面,然后沿着晶界和晶内同时向工件内部扩散, Ion nitriding is the metal parts placed in the active nitrogen medium, at a certain temperature and time, the nitrogen infiltration of the workpiece surface, thereby changing the chemical composition of the metal surface, so that it has a higher wear resistance, fatigue strength, resistance Corrosion resistance and anti-burn and so on a surface modification process [1]. Nitrogen ion is the first high-speed movement of the voltage injected into the workpiece surface, and then along the grain boundary and intra-grain simultaneously to the workpiece diffusion,