Wear resistance of austenite–TiC–graphite microstructures prepared by laser coating

Abstract

Cast iron was laser coated with a nickel based covered electrode. The cover material consisted of titanium, cobalt, carbon, rare earth, and slag forming powders. The laser coated layer included substantial amounts of austenite, some TiC particles, and nodular graphite, as well as small quantities of austenite–Fe₃C eutectic. Sliding wear tests were carried out to evaluate the wear properties of the microstructures. The effects of alloying elements and microstructures on wear resistance were investigated. The role of austenite during wear was particularly emphasised by experimental tests.