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GUO Xiao, XU Kai, HUO Shubin, CHEN Peiyin, CHEN Bo. Investigation on the solidification segregation behavior of GTAW nickel alloy deposited metal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(7): 105-108. DOI: 10.12073/j.hjxb.2019400190
Citation: GUO Xiao, XU Kai, HUO Shubin, CHEN Peiyin, CHEN Bo. Investigation on the solidification segregation behavior of GTAW nickel alloy deposited metal[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(7): 105-108. DOI: 10.12073/j.hjxb.2019400190
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Investigation on the solidification segregation behavior of GTAW nickel alloy deposited metal

  • 1.

    Harbin Welding Institute Limited Company, Harbin 150028, China

  • 2.

    Harbin Well Welding, Co., Ltd., Harbin 150028, China

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  • Received Date: October 23, 2018
    Graphical Abstract
    • Abstract
  • The solidification segregation behavior of deposited metal with nickel alloy wires by GTAW was investigated by Optical Microscope (OM), Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS) and Electron probe X-ray microanalyser (EPMA), etc. Results indicated that microstructure was composed of γ phase, MC carbides, Laves phases in the deposited metal. The metallurgical structure was columnar crystals with segregation zone of 5~10 μm in width. The segregation coefficients of primary elements were calculated with EPMA results according to Scheil formula, kNb=0.23, kMo=0.68, kNi=1.07, kCr=1.05, kFe=1.23. During solidification, Nb and Mo tended to segregate in the liquid phase, while Fe prefers to distribute into solid phase, Ni and Cr did not show significant distributions differences between liquids and solids. The reaction sequence of deposited metal with experimental nickel alloy wires during solidification was L→L+γ→L+γ+MC→L+γ+MC+Laves→γ+MC+Laves.
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  • 吴伟,陈佩寅,张锐.镍基焊接材料高温失塑裂纹的研究现状及研究趋势[J].焊接, 2005(5):5-8 Wu Wei, Chen Peiyin, Zhang Rui. Research status and development and ductility dip cracking of nickel-welding material[J]. Welding&Joining, 2005(5):5-8
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