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CHE Hongyan, ZHENG Tianming, WANG Henglin, DONG Hao, YAN Yingjie, CAO Rui. Microstructure and mechanical properties of thermal simulated MHC/GH4099 diffusion brazing joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(9): 15-20. DOI: 10.12073/j.hjxb.20210221001
Citation: CHE Hongyan, ZHENG Tianming, WANG Henglin, DONG Hao, YAN Yingjie, CAO Rui. Microstructure and mechanical properties of thermal simulated MHC/GH4099 diffusion brazing joints[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2021, 42(9): 15-20. DOI: 10.12073/j.hjxb.20210221001
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Microstructure and mechanical properties of thermal simulated MHC/GH4099 diffusion brazing joints

  • 1.

    Advanced Technology & Materials Limited Company, China Iron & Steel Research Institute Group, Beijing, 100081, China

  • 2.

    Engineering and Technology Research Center of Hot Isostatic Pressing, Zhuozhou, 072750, China

  • 3.

    State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, China

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  • Received Date: February 20, 2021
  • Available Online: December 01, 2021
    Graphical Abstract
    • Abstract
  • The molybdenum alloy (MHC) and the nickel alloy (GH4099) were successfully joined with NiCrSiB as the interlayer by the Gleeble-3800 thermal simulated machine. Microstructure of MHC/GH4099 welded joints were characterized by scanning electron microscope (SEM), energy dispersive scanning (EDS) and X-ray diffraction (XRD). The effects of bonding temperature on microstructure and shear strength were also investigated. Results indicated that a reliable welded joint can be obtained at peak temperatures of 950 ℃, 1 000 ℃ and 1 050 ℃ and holding time of 600 s. The MHC/GH4099 joints were mainly composed of γ-Ni solid solution, CrMo solid solution, MoNi and CrB, Ni3Si phase. The shear strength of the joint at 1 050 ℃ can reach 116 MPa. The larger stress concentration in the heat affected zone of MHC side was the main reason of brittle fracture for MHC/GH4099 joints.
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    • References (13)
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