【摘要】 利用QK-1型可控环境试验机研究了AISI316奥氏体不锈钢低温(470℃)气体渗碳层的摩擦学性能。结果表明,316奥氏体不锈钢低温气体渗碳层在进行低速对磨时(100 r/min)摩擦系数较大,在高速对磨时(300 r/min)摩擦系数和316奥氏体不锈钢低速和高速对磨时的摩擦系数基本一致;质量磨损率在低速和高速对磨时都减少,高速下低温渗碳层减少了3.5倍左右,低速下减少的幅度更大,达到10倍以上。316奥氏体不锈钢低温渗碳层表现为较好的耐磨性,磨损机制为磨粒磨损;316奥氏体不锈钢的磨损机制为粘着磨损,伴随着塑性变形的产生。更多还原

【Abstract】 Tribological properties of low-temperature gas carburized layer on 316 austenitic stainless steel(ASS) which was gas carburized at 470 ℃ for 48 h,was investigated on a QK-1 controlled environment testing machine.The results show that higher friction coefficient(μ) is observed for the low-temperature gas carburized layer at rotating speed of 100 r/min.The similar friction coefficients are presented,which range from 0.5 to 0.7 at both rotating speeds of 100 r/min and 300 r/min for the carburized and un-treated specimens,and lower friction coefficient is observed for the un-treated steel at low speed of 100 r/min.However,the wear rate of low-temperature gas carburized layer decreases significantly at both rotating speeds,which is reduced by a factor of 10 at the low-speed of 100 r/min and 3.5 at the high-speed of 300 r/min compared with that of un-treated 316 austenitic stainless steel(ASS).The low temperature gas carburization is effective process to enhance surface hardness and abrasive resistance of 316 austenitic stainless steel(ASS).Wear mechanism of the low-temperature gas carburized layer is abrasive wear.Wear mechanism of 316 austenitic stainless steels is adhesive wear,accompanied by plastic deformation.更多还原