Effects of graphite content on the microstructure and wear properties of an AISI 8620 steel surface modified by tungsten inert gas (TIG)

► AISI 8620 steel surface successfully modified with TIG method by using SiC and variable C powders. ► Added C (graphite) content improves hard surface structure and creates carbide phases. ► Increasing C (graphite) content affects coefficient of friction which is in a negative way. ► Hardness and wear rates can improve SiC/C content.