奥氏体不锈钢循环离子氮氧共渗工艺研究  

Research on cyclic plasma oxynitriding technique of austenitic stainless steel

作　　者：吴凯[1] 王蕾[2] 刘国权[1] 许伯藩[2] 

机构地区：[1]北京科技大学材料科学与工程学院,北京100083 [2]武汉科技大学材料与冶金学院,湖北武汉430081

出　　处：《金属热处理》2007年第12期74-77,共4页Heat Treatment of Metals

基　　金：武汉科技大学与武汉等离子体研究所合作项目(20056160273)

摘　　要：对0Cr18Ni9奥氏体不锈钢进行氮氧共渗循环离子渗氮试验,并和常规离子渗氮进行对比。利用光学显微镜、显微硬度计、XRD及磨损仪对渗氮层进行分析。结果表明,氮氧共渗循环离子渗氮比常规离子渗氮的渗氮速度快,渗层比常规离子渗氮厚;表面硬度为920 HV0.05(比常规离子渗氮高20 HV0.05),硬度梯度平缓;渗层中的ε相减少,γ′相增多;且渗层中的微量Fe3O4降低了表面摩擦系数,使工件经氮氧共渗循环离子渗氮后获得更高耐磨性。The cyclic plasma oxynitriding test of 0Crl8Ni9 austenitic stainless steel had been performed and compared with conventional ion nitriding processing. The nitriding layers were investigated by means of optical microscope, microhardness tester, XRD, and wear machine. The results show that, compared to the conventional ion nitrlding, the technique of cyclic plasma oxynitriding enhance the nitriding speed, make the nitriding layer deeper, the surface hardness can reach to 920 HV0. 05, which is 20 HV0. 05 higher than that of conventional ion nitriding processing, and the gradient of microhardness is smoother, ε phase of the nitriding layer decreases and γ′phase increases. Meanwhile, the trace of Fe3O4 which formed in the nitriding layer decreases the surface friction coefficient, so the workpieces which under cyclic plasma oxynitriding technique could obtain higher wear resistance.

关 键 词：0Cr18Ni9奥氏体不锈钢 氮氧共渗 离子渗氮 耐磨性 

分 类 号：TG156.8[金属学及工艺—热处理]