| 摘要 |
PURPOSE:To crystallize fine and uniform carbide and to obtain a build-up material having excellent wear resistance and toughness by specifying the compsn. of the build-up material. CONSTITUTION:The compsn. of a build-up material using a heat source having high energy density as a heating source consists of 2.50-11.80wt% C, <=0.5wt% Si, <=0.5wt% Mn, 1.50-4.50wt% Cr, 1.50-5.50wt% Mo, 2.50-6.50wt% W, 9.50- 50.00wt% V and the balance Fe. Such build-up alloy powder material is placed on an easily available base metal such as mild steel and carbon steel for structural purpose and is irradiated by a laser beam, by which said material is instantaneously melted and joined to the base metal and is instantaneously cooled. The fine and uniform carbide having a high concn. of vanadium is thus crystallized and the quickly cooled and solidified layer is formed. |
