表面合金化是在基体金属表面上(机械制造业中大量采用的是低炭钢)渗进硅、硼、钛、铝、铬、氮……等元素,通过扩散,改变基体金属表面的组织成份,以获得耐磨、抗蚀等性能,特别是解决强烈的化学介质侵蚀和抗高温氧化,节省贵重结构材料,起着重大的作用。辉光放电进行表面处理是金属表面合金化的一种新方法,它是气体放电的一种。气体放电的伏安特性曲线见图9。当电压由 O 逐渐增大,电流也由 O 逐渐增加到 A,当电压再增加时,电流在 A 至 B 区维持不变,这一区域称为黑暗放电区。当电压继续增 Surface alloying is the infiltration of elements such as silicon, boron, titanium, aluminum, chromium, nitrogen, etc. on the surface of the base metal (low carbon steel used in the machinery manufacturing industry). By diffusion, the microstructure of the base metal surface , In order to obtain the wear-resisting, anti-corrosive and other properties, especially to solve the strong chemical medium erosion and high temperature oxidation, saving valuable structural materials, plays a significant role. Glow discharge surface treatment is a metal surface alloying a new method, it is a gas discharge. The volt-ampere characteristic curve of gas discharge is shown in Fig.9. When the voltage is gradually increased from 0 to 0, the current increases gradually from 0 to 0. When the voltage increases again, the current remains unchanged in areas A to B, which is called dark discharge area. When the voltage continues to increase