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KONG Liang1,2, LING Zhanxiang1, WANG Ze2, WANG Min1,2, PAN Hua3, LEI Ming3. Study on influence factors of liquid metal embrittlement cracks in resistance spot welded joints of galvanized Q & P980 steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(7): 37-41. DOI: 10.12073/j.hjxb.2018390171
Citation: KONG Liang1,2, LING Zhanxiang1, WANG Ze2, WANG Min1,2, PAN Hua3, LEI Ming3. Study on influence factors of liquid metal embrittlement cracks in resistance spot welded joints of galvanized Q & P980 steel[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(7): 37-41. DOI: 10.12073/j.hjxb.2018390171
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Study on influence factors of liquid metal embrittlement cracks in resistance spot welded joints of galvanized Q & P980 steel

  • 1. Shanghai Key Laboratory of Materials Laser Processing and Modification, Shanghai Jiaotong University, Shanghai 200240, China;
    2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai 200240, China;
    3. Baosteel Central Research Institute, Baosteel Group Corporation, Shanghai 201900, China

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  • Received Date: September 18, 2017
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    • Abstract
  • The new generation ultrahigh strength Q & P (Quenching and Partitioning) steel owns both high strength and fine ductility, it has wide application prospect in automobile industry. However, after carrying out resistance spot welding experiment on the galvanized high strength Q & P980 steel plates, cracks were detected on the surface of joint, former researches showed that the cracks were caused by liquid metal embrittlement (LME), that was the steel plates were intergranular fractured under the effect of liquid zinc and stress. Experiment results indicated that process parameters (including welding current, welding time and electrode force) and process conditions (including electrode morphology, pressure mode and electrode alignment) were found to have influence on the LME cracks of joints. Thus, there is a possibility to reduce the crack sensibility by adjusting the process parameters and conditions.
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    • References (5)
  • 刁可山, 蒋浩民, 陈新平. 基于成形特性的宝钢QP980试验研究及典型应用[J]. 锻压技术, 2012, 37(6):113-115. Diao Keshan, Jiang Haomin, Chen Xinping. Research and typical application of QP980 steel produced by BaoSteel based on formability[J]. Forging & Stamping Technology, 2012, 37(6):113-115.[DOI: 10.3969/j.issn.1000-3940.2012.06.029]
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