PURPOSE: To stabilize the performance of a brazed part for a long period of time by incorporating a specific ratio each of Ag, Pd and Si and a specific ratio each of 1 or ≤2 kinds among Fe, Ni and Co and further a prescribed ratio of 1 or 2 kinds of Be and Li into a brazing filler metal.
CONSTITUTION: The Cu-Ag brazing filler metal contg. 25W65% Ag, 0.5W25% Pd, 0.25W6.5% Si and 1W10% 1 or ≥2 kinds among Fe, Ni and Co or further contg. 0.001W0.85 1 or 2 kinds of B and Li is produced by applying an ordinary melting method or plastic working method. The Cu-Ag alloy brazing filler metal obtd. in the above-mentioned manner has a low vapor presure and low m.p. as well as good wettability.
Next Patent: LOW MELTING POINT CU-AG ALLOY BRAZING FILLER METAL HAVING GOOD WETTABILITY