As the copper is added in, in brazing seam, the proportion of solid solution is increased and the content of compund is reduced, as well as the value of MBC is obviously increased.

• 由于铜的加入，增大了钎缝中固溶体比例、减少了钎缝组织中的化合物，接头的MBC值明显增大，使钎焊接头对钎焊间隙的敏感性降低。随着钎料中铜含量的增加，钎料及其钎焊接头的耐蚀性相应增强。