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XU Feng, XU Jinfeng, ZHAI Qiuya. Microstructural formation of austenitic stainless steel joint by capacitor discharge welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2009, (12): 101-104.
Citation: XU Feng, XU Jinfeng, ZHAI Qiuya. Microstructural formation of austenitic stainless steel joint by capacitor discharge welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2009, (12): 101-104.
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Microstructural formation of austenitic stainless steel joint by capacitor discharge welding

  • 1.

    School of Materials Science and Engineering, Shaanxi University of Technology, Hanzhong 723003, China;Xi'an University of Technology, Xi'an 710048, China

  • 2.

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

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  • Received Date: May 24, 2009
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    • Abstract
  • The 0Cr18Ni9 austenitic stainless steel sheet with 0.2 mm thickness was welded in capacitor discharge spot welding.The temperature field and cooling rate of nugget was calculated.The results show that the joint microstructure consists of nugget zone and semi-melt zone.Due to very short time in welding, the cooling rate of the joint reaches to 5.1×106 K/s, the growth of austenite microstructure is impeded, and the microstructure of the nugget is refined, which has rapidly solidified characteristics.As the austenite microstructure of the nugget stays in temperature province of activation with very short time, the chrome of austenite grain boundary precipitations is checked.To obtain the high quality spot-weld joint, the welding parameters are determined as: welding voltage 80 V, capacitor 6 600 μF and electrode pressure 18 N.
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