稀土Ce对Cu-Ag-P钎料钎焊接头组织和性能的影响

Effect of rare earth cerium on the microstructure and tensile properties of brazed joint

研究结果表明：当Ce含量为0．01％-0．025％时，钎料的流动性能优于不含稀土时的性能，但是对于Cu-Ag-P钎料钎焊接头强度没有明显影响。CuAg钎料钎焊接头组织为亚共晶，初生相为富Ag和P的α-Cu固溶体，共晶体组分为α-Cu固溶体＋Cu3P。与不含稀土CuAgP钎料相比，Ce细化了钎缝组织，是改善钎料填缝性能的主要原因。

The test show that the flowability of Cu-Ag-P brazing filler metal contain cerium is better. Cerium had no apparent effect on the tensile properties of brazed joint. Brazing joint of Cu-Ag-P brazing filler metal is composed of hypoeutectic microstructure. Primary sotidification structure is α-Cu solid solution rich in Ag and P. Eutectic phase is α-Cu solid solution and Cu3P intermetauic compound. Compared with CuAg brazing filler metal with no cerium, Ce fined microstructure, which improve the folwability of Cu-Ag-P the brazing filler metal.