工业纯铁稀土硼铝共渗的渗层组织及硼化物的形成机理

Microstructure of RE-B-Al Diffusion Layer of Armco Iron and the Formation Mechanism of Borides

采用膏剂法对工业纯铁进行稀土硼铝共渗，观察了渗层组织，探讨了硼化物的形成机制。分析认为，硼化物既可在晶内形核，又可在晶界形核，并且，硼化物的生长具有方向性，并不因遇到阻力而改变。

This paper deals with RE-B-Al diffused into the armco iron using pasty method. The analyzed result is that the borides could be nucleated both in grain and at grain boundary. It grows with directionality and the direction is not changed even resistance is met.