Formation gold model aluminum alloy filler material

摘要

PURPOSE:To prevent the generation of weld cracks and to etch or photoetch the weld zone with the result that the weld zone keeps the same composition as the base metal by using the title filler metal having specified contents of Si, Fe, and Mg in the welding of an Al alloy for the forming die for plastics, etc. CONSTITUTION:The filler metal contains, by weight, 6.0-12.0% Si, 0.2-1.0% Fe, 0.2-1.0% Mg, the balance Al, and inevitable impurities. When the Al alloy forming die of the 7,000 series for the plastics, rubber, etc., is welded by using the filler metal, weld cracks are not generated. When the weld zone is photoetched, the impression of the weld bead 4a is not transferred to the molded product of plastics, rubber, etc., and a satisfactory surface is obtained.