| 摘要 |
PURPOSE:To suppress the surface roughening of a Pd alloy filler metal after brazing and to inhibit the occurrence of ruggedness, by incorporating a specified amt. of at least one among Fe, Ni and Co into the Ag-Cu-Pd alloy. CONSTITUTION:The compsn. of a Pd alloy filler metal for brazing is composed of, by weight, 15-35%Cu, 5-25%Pd, 0.001-1.0% at least one among Fe, Ni and Co and the balance Ag. In case of <0.001% at least one among Fe, Ni and Co, the surface roughening of the filler metal after brazing and the occurrence of ruggedness can not be inhibited. In case of >1.0%, the filler metal flows excessively and spoils a base metal and an unfavorable influence is exerted on brazing strength. Therefore, if the amt. of at least one among Fe, Ni and Co is within the limited range, even when a member brazed with the filler metal is subjected to acid cleaning or plating, only a small amt. of a cleaning soln. or the like enters the surface recesses in the filler metal and the residual amt. of the soln. after removal is reduced. |
