Formation gold model aluminum alloy filler material and the production manner

摘要

PURPOSE: To provide the filler metal which is low in crack sensitivity even in repair welding of an aluminum alloy for molds for plastics, etc., and more particularly Al-Zn-Mg-Cu alloys and exhibits the etching property equiv. to the etching property of a base material in spite of photoetching. ;CONSTITUTION: This filler metal contains 3 to 8% Zn, 1 to 6% Mg, 0.5 to 3% Cu, 0.2 to 0.9% Mn, 0.05 to 0.5% Cr, 0.05 to 0.2% Ti, 0.01 to 0.2% B and 0.05 to 2% Zr, further, contains 0.02 to 1% Ag at need and consists of the balance Al and unavoidable impurities. Zr of a solid soln. amt. or above is incorporated into the filler metal by remelting the cast ingot of an aluminum alloy consisting of the compsn. cast by an ordinary method by a zone melting method with which a melting width of one time is specified to ≤30mm by using an energy beam (electron beam, laser beam, etc., having a high power density of 10⁴ to 10⁹w/mm² and subjecting the melt to rapid solidification at ≥1×10²°C/sec solidification rate.;COPYRIGHT: (C)1993,JPO&Japio