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Journal of Central South University

, Volume 25, Issue 5, pp 1025–1032 | Cite as

Partial transient-liquid-phase bonding of TiC cermet to stainless steel using impulse pressuring with Ti/Cu/Nb interlayer

  • Li Huang (黄利)
  • Guang-min Sheng (盛光敏)
  • Jia Li (李佳)
  • Guang-jie Huang (黄光杰)
  • Xin-jian Yuan (袁新建)
Article
  • 18 Downloads

Abstract

Partial transient liquid phase (PTLP) bonding of TiC cermet to 06Cr19Ni10 stainless steel was carried out. Impulse pressuring was used to reduce the bonding time, and a Ti/Cu/Nb interlayer was employed to alleviate the detrimental effect of interfacial reaction products on the bonding strength. Successful bonding was achieved at 885 °C under a pulsed pressure of 2–10 MPa within durations in the range of 2–8 min, which was notably shortened in comparison with conventional PTLP bonding. Microstructure characterization revealed the σ phase with a limit solubility of Nb, a sequence of Ti—Cu intermetallic phases and solid solutions of Ni and Cu in α+β Ti in the reaction zone. The maximum shear strength of 106.7 MPa was obtained when the joint was bonded for 5 min, indicating that a robust metallurgical bonding was achieved. Upon shear loading, the joints fractured along the Ti—Cu intermetallics interface and spread to the interior of TiC cermet in a brittle cleavage manner.

Key words

TiC cermet transient liquid phase impulse pressuring mechanical property fracture 

Ti/Cu/Nb 作中间层脉冲加压瞬间液相连接TiC 金属陶瓷与不锈钢

摘要

部分瞬间液相焊接(PTLP)综合了钎焊和固相扩散连接的优点,且对连接母材表面粗糙度比 传统固相连接相对较低,因此在陶瓷和金属异种材料连接方向上具有较大的优势。采用Ti—Cu—Nb 金 属中间层,对TiC 金属陶瓷与06Cr19Ni10 不锈钢进行PTLP 连接试验。通过SEM、EDS、XRD 和拉 伸试验等方法,研究了活性元素中间层、工艺参数对TiC/TiCuNb/06Cr19Ni10 瞬间液相焊接头性能与 界面微观结构的影响规律。结果表明,在连接温度885 °C、脉冲压力2~10 MPa 的工艺条件下保温5 min 时接头剪切强度达到最大值(~106.7 MPa)。微观组织表征发现,在TiC 金属陶瓷一侧,Ti—Cu 层在高 于共晶点的连接温度时发生熔化,与TiC 金属陶瓷、核心金属层Nb 产生界面反应;而在304SS 侧, Nb 与304SS 进行固相扩散, 形成具有固相扩散特征的连接结构, 连接后界面形成 06Cr19Ni10/σ/Nb/CuTi/CuTi2/α+βTi/TiC 过渡结构。连接接头的裂纹沿着Ti—Cu 金属化合物层向TiC 陶 瓷母材扩展,呈脆性解理断裂特征。

关键词

TiC 金属陶瓷 不锈钢 瞬间液相连接 脉冲加压 断口 力学性能 

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Copyright information

© Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  • Li Huang (黄利)
    • 1
  • Guang-min Sheng (盛光敏)
    • 1
  • Jia Li (李佳)
    • 2
  • Guang-jie Huang (黄光杰)
    • 1
  • Xin-jian Yuan (袁新建)
    • 1
  1. 1.College of Materials Science and EngineeringChongqing UniversityChongqingChina
  2. 2.Changan Commercial Vehicle Business DepartmentChina Changan Automobile GroupChongqingChina

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