To provide a welding material, which is most suitable for repairing the mold disclosed in Japanese Published Patent Application No.2007-146278, and specifically has excellent mirror-finishing property while keeping the performance of the mold even after welding to repair the mold, and further which makes equal the hardness of a welded part and that of the base material of the mold to suppress unevenness in embossing or uneven wear in forming.
A mold is made of steel containing, by mass%, 0.10-0.25% C, 1.00% Si, 2.00% Mn, 0.60-1.50% Ni, 1.00% and 2.50% Cr, Mo and/or W alone or in combination to satisfy 0.10-1.00% of (Mo+1/2W), 0.03-0.15% V, 0.50-2.00% Cu, 0.007-0.05% S, and the balance Fe with inevitable impurities. A welding material for repairing the mold is composed of the steel containing, by mass%, 0.07-0.25% C, 0.40-1.00% Si, 2.00% Mn, 0.40-1.50% Ni, 0.80% and 2.50% Cr, Mo and/or W alone or in combination to satisfy 0.08-1.00% of (Mo+1/2W), 0.02-0.15% V, 0.10-0.45% Cu, 0.005% S, and the balance Fe with inevitable impurities.
TOYAMA FUMIO
SUGANO RYUICHIRO
