CuMnNiSi钎料钎焊不锈钢接头组织性能研究

Structure and Property of Stainless Steel Brazed Joint with CuMnNiSi Filler Metal

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。

The effects of brazing temperature and holding time on the microstructure and mechanical property at room-temperature of the brazed stainless steel joint with Cu-Mn-Ni-Si filler metal in vacuum were studied.The results show that the brazed joint is made up of Cu-Mn based solid solution in the middle area of the brazing seam and（Fe,Ni,Mn）-Si intermetallic phase in the reaction area near the interface.The volume of intermetallic phase decreases and joint clearance is primarily occupied by Cu-Mn based solid solution with the increase of brazing temperature,the shear strength of the brazed joint at room-temperature increases with the increase of the brazing temperature and reaches 321 MPa when brazing holding time is 15 min and brazing temperature is 1050 ℃.The shear strength of the brazed joint at room-temperature increases first and then decreases with the increase of the brazing holding times,and reaches 305 MPa when the brazing holding time is 30 min.