沉积行为对电火花沉积Ti(C,N)涂层微结构的调控机制

Regulation Mechanism of Deposition Behavior to Microstructure of Ti(C,N) Coating Prepared by Electro Spark Deposition

通过改变行走角度和电极直径,在800MPa级高强钢（牌号BF780CF）表面利用单点和多道脉冲电火花沉积技术沉积Ti（C,N）涂层。研究了沉积角度和电极直径对沉积层粗糙度的影响。结果表明：经多道沉积后可较大程度上改善单点沉积形成的表面粗糙形态。表面粗糙度随电极直径的变大而恶化,直径为3mm电极沉积所获得的表面质量最好。采用不同行走角度进行沉积时,引起表面粗糙度恶化的原因有所差异,行走角为45°时主要由熔滴溅射形成,而75°时未熔颗粒的作用变大。

By changing walking angle and electrode diameter, Ti （C,N） coating was deposited on the surface of 800MPadegree high strength steel （BF780CF） by single point or multi-pass electro spark deposition （ESD）, and the effects of walkingangle and electrode diameter on the roughness of the deposition layer were investigated. The results show that the surfacerough pattern formed by single point deposition improves obviously by multi-pass deposition. The surface roughnessdeteriorates with the diameter enlarging. The surface quality is optimum while the electrode diameter is 3 mm in deposition.The reason for the deterioration of surface roughness is different, while adopting diverse walking angles. The main reason isdroplet sputtering while the walking angle is 45°, however, the effect of unmelted particles increases while the walking angleis 75°.