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YANG Quanhu, ZHAI Qiuya, XU Jingfeng, JI Tengfei, YE Jianlin. Capacitor discharge welding of Ta1 and 0Cr18Ni9 thin plates[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(9): 116-121. DOI: 10.12073/j.hjxb.2019400246
Citation: YANG Quanhu, ZHAI Qiuya, XU Jingfeng, JI Tengfei, YE Jianlin. Capacitor discharge welding of Ta1 and 0Cr18Ni9 thin plates[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(9): 116-121. DOI: 10.12073/j.hjxb.2019400246
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Capacitor discharge welding of Ta1 and 0Cr18Ni9 thin plates

  • 1.

    Xi'an University of Technology, Xi'an 710048, China

  • 2.

    Xi'an United Pressure Vessel Co., Ltd., Xi'an 710201, China

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  • Received Date: January 03, 2018
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    • Abstract
  • Capacitor discharge spot welding with rapid solidification characteristics of Ta1 and 0Cr18Ni9 thin plates were carried in present paper. The microstructure and properties of the welding joints between by direct CDW and adding Fe5Co24Ni27Cu25Cr19 interlayer alloy were analysed and discussed. The results show that the solute trapping can effectively inhibit brittle intermetallic compounds to realize welding tantalum and steel welding. The welding joints of the direct CDW possess hyperbolical and gyro shaped and the melting zone is located in one side of the 0Cr18Ni9 plate. Nuggets appear about 0.2 mm subcircular porosity in diameter, and Fe5Ta3 and Cr2Ta intermetallic compounds are produced at the interface between tantalum and steel. The welding joint added high entropy interlayer alloy is composed of cap-shaped nugget and fusion area of the transition base metal. Furthermore, the nugget have simple solid solution structure and fine microstructure which consisted of columnar crystals. Under the same condition, shear strength of the joint is 239 MPa by direct spot welding of Ta1 and 0Cr18Ni9 and the higher shear strength of Ta1/0Cr18Ni9 spot welding joint by CDW reached 374 MPa.
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