两种钎料对不锈钢钎焊接头组织和力学性能的影响
Effects of Filler Metal on Microstructure and Mechanical Properties of Stainless Steel Brazed Joint
杨 光， 李 宁， 颜家振， 肖 伟
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作者单位：（四川大学 制造科学与工程学院， 四川 成都 610065）
中文关键字：锰基钎料；Ni-Cr-P；真空钎焊；剪切强度
英文关键字：manganese based filler metal; Ni-Cr-P; vacuum brazing; shear strength
中文摘要：采用四号锰基钎料真空钎焊2Cr13不锈钢，研究了钎焊温度对其接头组织和室温及高温剪切强度的影响，并与Ni-Cr-P钎料钎焊不锈钢接头进行了对比。结果表明：四号锰基钎料钎焊接头组织由Mn-Ni基的单相Mn-Ni-Cu-Fe-Cr-Co固溶体组成，接头室温剪切强度随着钎焊温度的升高逐渐增加；Ni-Cr-P钎料钎焊接头组织由Ni-Fe基固溶体和Ni(Cr,Fe)-P化合物组成，接头室温剪切强度低于四号锰基钎料钎焊接头的室温剪切强度。当测试温度超过500 ℃时，Ni-Cr-P钎料钎焊接头的高温剪切强度降低幅度不大，四号锰基钎料钎焊接头降低明显，但仍高于Ni-Cr-P钎料钎焊接头的高温剪切强度。
英文摘要：The effects of brazing temperature on the microstructure, shear strength at room temperature and high temperature of 2Cr13 stainless steel joint brazed with 4# manganese filler metal in vacuum were studied. The research result was compared with stainless steel joint brazed with Ni-Cr-P filler metal. The results show that the brazed joint of 4# manganese filler metal is made up of Mn-Ni-Cu-Fe-Cr-Co solid solution. The shear strength of the brazed joint at room-temperature gradually increases with the increase of the brazing temperature. The brazed joint of Ni-Cr-P filler metal is made up of Ni-Fe solid solution and Ni（Cr，Fe）-P intermetallic. The shear strength of the brazed joint at room temperature is lower than the shear strength of the brazed joint of 4# manganese filler metal at room temperature. The shear strength at high temperature of the brazed joint of Ni-Cr-P filler metal and 4# manganese filler metal gradually and rapidly decreases above 500 ℃, respectively, but the 4# manganese filler metal is still higher than the brazed joint of Ni-Cr-P filler metal.