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胡胜鹏,陈祖斌,雷玉珍,宋晓国,康佳睿,曹健,唐冬雁.TiZrNiCu/Ti60润湿性及与TiBw-TC4钎焊研究[J].稀有金属材料与工程(英文),2019,47(3):701~710.[S. P. Hu,Z. B. Chen,Y. Z. Lei,X. G. Song,J. R. Kang,J. Cao and D. Y. Tang.Wettability of TiZrNiCu-B/Ti60 system and its brazing to TiBw-TC4 composite[J].Rare Metal Materials and Engineering,2019,47(3):701~710.]
Wettability of TiZrNiCu-B/Ti60 system and its brazing to TiBw-TC4 composite
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Received:October 09, 2017  Revised:October 27, 2017
DOI:
Key words: wetting  TiZrNiCu-B filler  Ti60 alloy  TiBw-TC4 composite  joint strength
Foundation item:国家自然科学基金项目(面上项目,重点项目,重大项目)
Author NameAffiliation
S. P. Hu,Z. B. Chen,Y. Z. Lei,X. G. Song,J. R. Kang,J. Cao and D. Y. Tang  
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Abstract:
      In this work, the connection between the boron content and the wettability of TiZrNiCu/Ti60 system was studied by sessile drop method of elevating and maintaining isothermal process under vacuum, and TiBw-TC4 composite was successfully brazed to Ti60 alloy using TiZrNiCu-B filler alloy with brazing temperature of 940 °C for 10 min. The contact angle of TiZrNiCu/Ti60 alloy substrate and the corresponding interfacial microstructure, the interfacial microstructures and shear fractures of brazed joints were studied using SEM, EDS and XRD, and the influence of B content on interfacial microstructure and joining properties was also investigated in detail. Added B element can react with Ti to in-situ synthesizing TiB whiskers (TiBw), which resulted in a relative refinement of microstructure. And the maximum shear strength of TiBw-TC4/TiZrNiCu-B/Ti60 joint was 177 MPa when the content of B is 0.3 wt.%, which was 65% higher than the joints brazed without B content. However, the excessive B content worsened the wetting behavior of TiZrNiCu-B on Ti60 alloy substrate, resulted in the microvoids and disconnected area in the brazed joint, and the shear strength decreased inevitably.