航空零件0Cr18Ni10Ti奥氏体不锈钢渗碳层的耐磨性研究

Study of Wear Resistance of 0Cr18Ni10Ti Austenitic Stainless Steel

研究航空零件0Cr18Ni10Ti奥氏体不锈钢表面渗碳层的耐磨性。结果表明,经过低温渗碳处理后,在转速为150 r/min的磨损条件下试样表面渗碳层的摩擦系数较大。转速为400 r/min时,奥氏体不锈钢本体与低温渗碳层的摩擦系数相近。两种情况下,低温气体渗碳层磨损率都低于奥氏体不锈钢本体,在低速情况下相差幅度较大。0Cr18Ni10Ti与渗碳层的磨损机制分别为粘着磨损和磨粒磨损。可见在450℃保温72 h处理后,可提高奥氏体不锈钢的耐磨性。

The wear resistance of 0Cr18Ni10Ti austenitic stainless steel after carburizing was studied. The results show that in the case of 400 r/min, the friction coefficient of the sample surface carburizing layer under low temperature is larger. In the case of 400 r/min, the friction coefficient of austenitic stainless steel body is similar with the low temperature carburizing layer. In the two case, the wear rate of the low temperature gas carburizing layer is lower than that of the austenitic stainless steel. The wear mechanism of 0Cr18Ni10 Ti and the low temperature gas carburizing layer is the adhesive wear and abrasive wear, respectively. The wear resistance of austenitic stainless steel can be improved by the method of low temperature and heat preservation for 72 h.