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采用新型的Cu-Mn-Ni-Si钎料真空钎焊2Cr13不锈钢,研究了钎焊温度和保温时间对接头组织和室温力学性能的影响。结果表明:钎焊接头组织由钎缝中心区Cu-Mn基固溶体和钎缝界面反应区的(Fe,Ni,Mn)-Si化合物组成。随着钎焊温度的增加,钎缝界面处化合物层厚度减小,Cu-Mn基固溶体相应增多,接头室温剪切强度随之增加,在钎焊时间15min、钎焊温度1050℃时达到321MPa。在钎焊温度1000℃时,接头室温剪切强度随着钎焊保温时间的延长先增加后降低,在钎焊保温时间30min时取得最大值305 MPa。
A new type of Cu-Mn-Ni-Si brazing filler metal was vacuum brazed to 2Cr13 stainless steel. The effects of brazing temperature and holding time on the microstructure and mechanical properties at room temperature were studied. The results show that the microstructure of the brazed joint is composed of (Fe, Ni, Mn) -Si compounds in the Cu-Mn-based solid solution in the center of the brazing seam and in the interface of the brazing seam. With the increase of the brazing temperature, the thickness of the compound layer at the brazing seam interface decreases and the Cu-Mn based solid solution increases accordingly. The shear strength at room temperature increases with the brazing time at 15min and the brazing temperature at 1050 ℃ to 321MPa. When the brazing temperature is 1000 ℃, the shear strength at room temperature first increases and then decreases with the prolongation of brazing holding time, and the maximum value is 305 MPa at 30min brazing holding time.