COMPOSITE HARDFACING WELDING WIRE, SINTER CAKE SUPPORT STAND USING THE SAME, AND DOWNDRAFT SINTERING MACHINE

摘要

Disclosed is a composite hardfacing welding wire made from a low carbon steel hoop and a filler, which is for a sinter cake support stand used in a downdraft sintering machine and prolongs the stand replacement cycle and provides for extended stand life, and consequently can contribute to improved productivity in the manufacture of sintered ore. The wire is made to include, in mass%, (A) C: 3-6%, (B) Si: 0.8-2%, (C) Cr: 20-30%, and (D) Mo: 4-8%, and to further include either (E) Nb: 3-8%, B: 0.4% or less (including 0), (F) Nb: 8% or less (including 0) and B: 0.2-0.4%, the remainder being Fe, Mn, and inevitable impurities.