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田骁,赵洪运,宋晓国,韩桂海,冯吉才.Ti-28Ni钎料真空钎焊TZM合金接头界面组织与力学性能[J].稀有金属材料与工程(英文),2018,47(3):927~931.[Tian Xiao,Zhao Hongyun,Song Xiaoguo,Han Guihai,Feng Jicai.Interfacial Microstructure and Properties of TZM Alloy Joints Brazed Using Ti-28Ni Filler Metal[J].Rare Metal Materials and Engineering,2018,47(3):927~931.]
Interfacial Microstructure and Properties of TZM Alloy Joints Brazed Using Ti-28Ni Filler Metal
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Received:March 01, 2016  Revised:April 15, 2016
DOI:
Key words: TZM alloy  Vacuum brazing  Interfacial microstructure  Mechanical property
Foundation item:国家科技重大专项资助(项目号2014ZX04001131),国家自然科学基金资助(项目号51405099)
Author NameAffiliationE-mail
Tian Xiao Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining 646073382@qq.com 
Zhao Hongyun 哈尔滨工业大学  
Song Xiaoguo Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining songxg@hitwh.edu.cn 
Han Guihai Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining  
Feng Jicai Harbin Institute of Technology,State Key Laboratory of Advanced Welding and Joining  
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Abstract:
      TZM alloy was successfully brazed using Ti-28Ni as filler metal at 1040℃. The effect of holding time on interfacial microstructure and mechanical properties of brazed joints was studied and the typical microstructure of joint was detected using SEM, EDS. As a result, the typical interfacial microstructure was: TZM/Tiss/δ-Ti2Ni/Tiss/TZM. As increased the holding time, the width of the braze seam decreased, the continuous width of Tiss basically did not change, and the width of central δ-Ti2Ni layer decreased to some extent. Meanwhile, the diffusion of TZM into base materials enhanced. When the holding time was relatively short, there was undissolved TZM block in the weld joints, and the base metal could dissolve thoroughly while extending the holding time. The highest average shear strength of 92.6 MPa was achieved when the holding time was 10 min, and the fracture happened at δ-Ti2Ni layer, which was intergranular brittle fracture.