| abstract |
(57) [Summary] [Problem] It is possible to braze at a temperature of 700 ° C. or less, obtain a strong joint without voids and carbide residues, and until the brazing material melts even when applied on a vertical surface. A brazing paste that does not run off is realized. SOLUTION: P having a weight of 2 to 11%, 0.9 to 10%. Homopolymerization of 100 parts by weight of an alloy powder containing Ni and 4 to 26% of Sn, the balance being Cu, and a compound in which one α substituent of the α, α-2-substituted vinyl monomer is a methyl group or 0.5 to 20 parts by weight of a polymer having a weight average molecular weight of 10,000 to 200,000 obtained by copolymerization, and 5 to 20 parts by weight of an organic solvent having a boiling point of 250 ° C. or less and containing no aromatic group. And 20 parts by weight. At the joint boundary with the base material Cu, a strong alloy bond in which the primary crystal of Sn is diffused can be formed, and at the brazing filler metal portion, there are no carbides or voids, and compounds such as CuP and NiP have a tough multi-element eutectic structure. ing. |