等离子束表面强化技术综述

Summarization of Plasma Beam Surface Strengthening Technology

等离子束快速扫描并加热工件,使工件表面快速熔化,然后在基体及空气的快速冷却下,使工件表面获得组织均匀、晶粒细小的改性层。熔凝层发生的细晶强化、固溶强化能有效提高耐磨性、抗蚀性,合金化层不仅具有熔凝层的特征,并且晶粒细化的效果更好,显微组织更加致密。这些使合金化层的硬度、耐磨性和耐蚀性优于熔凝层的。

The plasma beam quickly scans and heats the workpiece to melt its surface, and the modified layer with organization uniform, fine grain is obtained by the matrix and air with the rapid cooling rate. Fine grain strengthening and solid solution strengthening in the melted layer make effectively improve the wear resistance, corrosion resistance. The alloyed layer not only has the characteristics of the melted layer, but also has more fine grain and dense micro-organization. These make the alloyed layer harder, more abrasion resistance and corrosion resistance than the melted layer.