航空学报 > 2017, Vol. 38 Issue (12): 421402-421402   doi: 10.7527/S1000-6893.2017.421402

钎焊温度对Ti60/AgCu/ZrO2接头界面组织及性能的影响

卞红1, 胡胜鹏2, 宋晓国1,2, 周志强2, 冯吉才1,2   

  1. 1. 哈尔滨工业大学 先进焊接与连接国家重点实验室, 哈尔滨 150001;
    2. 哈尔滨工业大学(威海) 山东省特种焊接技术重点实验室, 威海 264209
  • 收稿日期:2017-05-08 修回日期:2017-07-31 出版日期:2017-12-15 发布日期:2017-07-31
  • 通讯作者: 宋晓国 E-mail:xgsong@hitwh.edu.cn
  • 基金资助:
    国家自然科学基金(51405099);国家科技重大专项(2014ZX04001131)

Effect of brazing temperature on interfacial microstructure and mechanical property of Ti60/AgCu/ZrO2 joint

BIAN Hong1, HU Shengpeng2, SONG Xiaoguo1,2, ZHOU Zhiqiang2, FENG Jicai1,2   

  1. 1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;
    2. Shandong Provincial Key Laboratory of Special Welding Technology, Harbin Institute of Technology(Weihai Extension), Weihai 264209, China
  • Received:2017-05-08 Revised:2017-07-31 Online:2017-12-15 Published:2017-07-31
  • Supported by:
    National Natural Science Foundation of China(51405099); National Science and Technology Major Project(2014ZX04001131)

摘要: 采用AgCu钎料实现了Ti60合金和ZrO2陶瓷的钎焊连接。使用扫描电子显微镜(Scanning Electron Microscope,SEM)、能谱仪(Energy Dispersive Spectrometer,EDS)和X射线衍射仪(X-Ray Diffractometer,XRD)等分析测试手段,对不同钎焊温度下获得的接头界面组织结构进行了分析。研究表明,Ti60/AgCu/ZrO2接头典型界面组织为:Ti60合金/α-Ti+Ti2Cu扩散层/TiCu+TiCu2/Ag(s,s)+Cu(s,s)/Ti3Cu3O反应层/TiO反应层/ZrO2陶瓷。随着钎焊温度的升高,α-Ti+Ti2Cu扩散层、TiCu+TiCu2层、Ti3Cu3O层及TiO层厚度均逐渐增加,颗粒状Ti-Cu化合物不断长大,Ag(s,s)和Cu(s,s)含量逐渐减少。剪切试验表明,在钎焊温度为900℃、保温时间为10 min条件下获得的接头室温抗剪强度最高为124.9 MPa,500℃和600℃抗剪强度分别为83.0 MPa和30.2 MPa。断口分析表明:接头沿ZrO2陶瓷/钎料界面和靠近该界面的钎缝发生断裂。

关键词: AgCu钎料, Ti60合金, ZrO2陶瓷, 钎焊, 界面组织, 力学性能

Abstract: Reliable brazing of Ti60 alloy and ZrO2 ceramic was successfully achieved using AgCu filler metal. The interfacial microstructure and reaction products of Ti60/AgCu/ZrO2 joints brazed at different temperatures were investigated by the Scanning Electron Microscope (SEM), Energy Dispersive Spectrometer (EDS) and X-Ray Diffractometer (XRD). Results show that the typical interfacial microstructure of the Ti60/AgCu/ZrO2 joint was Ti60 alloy/α-Ti+Ti2Cu diffusion layer/TiCu+TiCu2/Ag(s,s)+Cu(s,s)/Ti3Cu3O layer/TiO layer/ZrO2 ceramic. With the increase of the brazing temperature, the thickness of the diffusion layer of α-Ti+Ti2Cu, TiCu+TiCu2 layers, Ti3Cu3O layer and TiO layer adjacent to the ZrO2 ceramic increased gradually, and the granular Ti-Cu IMCs grew gradually, meanwhile the content of the Ag-based solid solution and Cu-based solid solution decreased. The shear test indicates that the joint brazed at 900℃ for 10 min exhibited the highest shear strength of 124.9 MPa tested at room temprature, and the joint tested at 500℃ and 600℃ exhibited the shear strength of 83.0 MPa and 30.2 MPa, respectively. Typical fracture analysis displays that the brazed joint tended to fracture at the interface between the ZrO2 ceramic and the brazing seam, and in the brazing seam adjacent to the interface.

Key words: AgCu filler, Ti60 alloy, ZrO2 ceramic, brazing, interfacial microstructure, mechanical property

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