Laser surface melting of 10?wt% Mo alloyed hardfacing Stellite 12 plasma transferred arc deposits: Structural evolution and high temperature wear performance

摘要

Highlights?LSM of Stellite 12 and Stellite 12?+?10?wt% Mo deposits generated duplex layer.?Duplex layer of the alloyed one was thicker.?Surface hardness of the alloyed one was higher.?Alloyed and unalloyed ones exhibited similar wear performance at RT.?Alloyed one exhibited superior performance at 500?°C due to tribo-oxidation.AbstractLaser surface melting (LSM) process has been applied on the plasma transferred arc (PTA) deposited Stellite 12 and 10?wt% Mo alloyed Stellite 12 in this study. Following the LSM process, structural and mechanical property comparison of the LSM’ed surfaces has been made. Hardness of the LSM’ed surfaces was measured as 549?HV and 623?HV for the Stellite 12 and Stellite 12?+?10?wt% Mo deposits, respectively. Despite their different hardness and structural features, the LSM’ed surfac