WELDING WIRE FOR SUBMERGED ARC WELDING OF CR-MO LOW ALLOY STEEL

摘要

PURPOSE:To obtain a weld zone having high toughness and high strength by using a wire contg. C, Si, Mn, Cr, Mo, B, N, Ti, Zr, Al at specific ratios in submerged arc welding of titled steel having a specific compsn. CONSTITUTION:Submerged arc welding of the Cr-Mo low alloy steel composed specifically, by weight, of =0.14% C, 0.05-0.60% Si, 0.20-1.50% Mn, 1.0- 10.0% Cr, 0.40-2.50% Mo is accomplished by using a wire which contains 0.0001-0.01% B and 0.010-0.035% N as essential components in addition to the basic components speciified to 0.05-0.15% C, =0.20% Si, 0.4-1.5% Mn, 1.0-10.5% Cr, 0.40-2.50% Mo and =1 kinds among 0.02-0.30% Ti, 0.05- 0.30% Zr, 0.05-0.20% Al as additives, contains 0.003-0.30% (Ti+Al+Zr+10B) and is added with 0.1-1.2% Ni according to need.