On the Possibility of Laser Cladding for 304 Stainless Steel using Commercially Pure Titanium

摘要

This work is an attempt to study the possibility of cladding the 304 stainless steel with commercially pure titanium powder using YAG fiber laser. The treatments were carried out at powers of 2800, 2400 and 2000 W and travelling speeds of 4 and 8 mm/s. In the titanium side, acicular a' martensite structure was produced. At low travelling speed (4 mm/s), coarse intermetallic phases (FeTi and Fe2Ti) were formed, and decohesion were resulted at the interface between the cladding layer and the substrate. At higher speed (8 mm/s), the cracking was reduced. Complete cohesion was resulted in case of 2000 W. Remarkable improvements in surface hardness and wear resistance were achieved at all the processing condition. Higher hardness and lower wear weight losses were obtained at lower processing power of 2000 W and travelling speed of 8 mm/s.