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。
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 earburized 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 austenitie 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 earburized layer is abrasive wear. Wear mechanism of 316 austenitic stainless steels is adhesive wear, accompanied by plastic deformation.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第1期181-185,共5页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金(50975210)
关键词
316奥氏体不锈钢
低温气体渗碳
摩擦学性能
316 austenitic stainless steel（ASS）
low temperature gas carburization（LTGC）
tribological property
