Slurry Eosion Characrteristics of Stellite 6 on AISI 316 and AISI 420 Stainless Steels Formed by Welding

In the present work, microstructure and slurry erosion properties of the satellite 6 cladding produced by TIG on AISI 316 and AISI 410 stainless steels was investigated. Optical microscopy, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) were used to study the microstructure and erosion mechanisms. X-ray diffraction method was also employed to identify phases formed in the coating. The results showed that the microstructure of coating consisted of carbides embedded in a Co-rich solid solution. The higher erosion resistance was observed at coated samples compare to bare steels. Also, a marked corrosion influence was identified on erosion behavior of coating. In this case, the higher erosion resistance of coating was obtained for AISI 316 due to its better response to corrosive attack. A brritle mode of erosion behavior was observed for stellite coating.