The design of plasma torch, which is the center part of surface metallurgy equipment by plasma-jet, the selection of alloying powder and processing parameter are analysed in the paper.

• 系统地分析和探讨了等离子束表面冶金设备的核心部件等离子炬的设计、表面冶金的合金材料的选择、表面冶金工艺的确定。