【摘要】 不锈钢双辉渗银处理获得的渗银层硬度较低且不耐磨,因此设计硬化方案对渗银不锈钢进行硬化,以改善其耐磨性。采用等离子氮碳共渗技术进行渗银层的改性工作,对不同工艺下膜层的微观形貌、成分及物相构成进行了分析,并对比了其硬度及磨损性能。两种硬化工艺下测得的硬度及磨损试验数据如下:渗银处理(×3h)+渗氮碳处理(×10h)工艺制备的试样表面硬度值为283HV0.025,15s,平均摩擦系数为0.4287,磨损失重为12.9mg;渗氮碳处理(×10h)+渗银处理(×3h)工艺制备的硬度值为544HV0.025,15s,平均摩擦系数为0.4266,磨损失重为11.5mg。可以看出渗银处理(×3h)+渗氮碳处理(×10h)工艺未提升渗银不锈钢的表面硬度,渗氮碳处理(×10h)+渗银处理(×3h)工艺将渗银不锈钢的表面硬度提升了近1倍。两种硬化工艺对渗银不锈钢的耐磨性能略有改善。更多还原

【Abstract】 This work presented and investigated several hardening processes(including two duplex processes)for silver-alloyed layer(formed by double glow plasma technology)of stainless steel,in order to improve its low hardness and poor wear resistance.The hardening processes involved active screen plasma nitriding and carburizing technology,and under which the modified silver-alloyed layers′microstructures,chemical compositions,phase compositions,micro-hardnesses and wear performances were observed,identified,measured and compared.The process of 3h silver infiltration+ 10 hnitriding and carburizing resulted in a micro-hardness of 283HV0.025,15 s,an average friction coefficient of 0.4287,and a wear loss of 12.9mg,while its reversed process,i.e.10 hnitriding and carburizing +3hsilver infiltration led to 544HV0.025,15 s,0.4266 and 11.5mg,respectively.These results inferred that 3hsilver infiltration +10hnitriding and carburizing causes inconspicuous promotion of silver-alloyed layer′s micro-hardness,which contrasts sharply with the nearly 100% micro-hardness increment induced by its reversed process.Those two duplex processes can slightly enhance wear resistance of the silver-alloyed layers.更多还原