常压等离子体渗氮层摩擦学性能的试验研究

Tribological properties of atmospheric pressure non-equilibrium plasma nitriding coating

利用介质阻挡放电,形成非平衡等离子体,在自制的设备上进行常压等离子体渗氮研究.采用优化工艺对42CrMo材料进行离子渗氮处理,对处理后的试样硬度、断面金相组织进行了分析,对渗层的摩擦学性能进行了研究,并与辉光离子渗氮工艺比较.试验结果表明:这种工艺完全达到了辉光渗氮处理的要求,并且组织致密,有利于提高其耐磨性.该渗氮工艺具有渗速快、渗层深、白亮层厚、渗氮效率高等优点.

Using dielectric barrier discharge (DBD), atmospheric pressure non-equilibrium plasma nitriding technology is under development. 42CrMo steel was nitrided under optimum process using the new technology. Micro-hardness, micro-structure and the tribological properties of the nitriding layer were studied and compared with those of vacuum plasma nitriding process. The experimental results showed that thicker white-layer and diffusion layer on the treated surface can be acquired in a shorter time compared with the vacuum plasma nitriding.