Surface modification method of duplex type stainless steels by the pack boriding process

This work presents the investigation of a boriding process on two grades stainless steel namely UNS32750 super duplex and UNSS31803 in order to improve material properties possibly reduce catastrophic failure industrial components. Usage steels has become customary fields oil refinery, marine pipeline applications due increased corrosion resistance; however, these materials exhibit low wear characteristics. To overcome this problem, pack was employed. Evaluation effects microstructure mechanical performed using scanning electron optical microscopy, Vickers hardness tests tests. It shown that 4 h resulted greatest layer thickness yielding maximum surface 1407 HV while value 1201 UNSS31803. Wear resistance borided were up 6-fold greater than those non - treated materials. Also, be more suitable for valve shaft components as compared boronized steel.