The Effect of Deposition Temperature on the Microstructure and Erosion Properties of the TiN Coating by PACVD on 316 Austenitic Stainless Steel

In this study, in order to improve surface properties of 316 austenitic stainless steel and its erosive properties, nanostructured TiN layers by PACVD method were developed. The TiN coatings were deposited on AISI 316 austenitic stainless at three different temperatures 470, 490 and 510 °C and duty cycle 33% by means of PACVD method. Microstructure and cavitation resistance were characterized by techniques such as field emission scanning electron microscopy (FE-SEM), XRD, micro hardness, erosion tests. The results indicated that with increasing deposition temperature from 470 to 510 °C, grain size of coating increased from 12 to 47 nm. It was found that at 470 °C, has the best erosive properties.