TiAl/40Cr高频感应钎焊接头的界面组织及力学性能

中国有色金属学报, 2004, 14(8): 1269-1273.

TiAl/40Cr高频感应钎焊接头的界面组织及力学性能

李玉龙 ^1, , 冯吉才 ^2, , 何鹏 ^3, , 闫久春 ^4,

1.哈尔滨工业大学,现代焊接生产技术国家重点实验室,哈尔滨,150001

2.哈尔滨工业大学,现代焊接生产技术国家重点实验室,哈尔滨,150001

3.哈尔滨工业大学,现代焊接生产技术国家重点实验室,哈尔滨,150001

4.哈尔滨工业大学,现代焊接生产技术国家重点实验室,哈尔滨,150001

基金项目: 国家高技术研究发展计划(863计划)(2003AA305210)

关键词： TiAl/40Cr , 感应钎焊 , 显微组织 , 力学性能

Interfacial microstructure and mechanical properties of induction brazing TiAl/40Cr joints

以Ag-Cu-Ni-Li为钎料对TiAl与40Cr进行了高频感应钎焊,研究了TiAl/40Cr钎焊接头的界面组织和力学性能.采用扫描电镜、电子探针、X射线能谱分析仪等分析了界面组织及生成相,测试了接头的抗拉强度及界面生成相的显微硬度.结果表明:钎料与2种母材发生界面生反应成Al3Ti、Ag[s,s]、Ti(CuAl) 2、Ti2Ni和TiC等多种反应相,接头界面结构Al/A为Til3Ti/Al3Ti十Ag[s,s]/Ti(CuAl)2+Ti2Ni+Ag[s,s]/TiC/40Cr.在实验所选的工艺参数范围内,当连接温度θ=850℃,保温时间t=180 s时,接头的抗拉强度达到265 MPa.

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