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ZHAOXin-yu, GANG Tie, YUAN Yuan. Ultrasonic signal analyses of spot welds in thin steel sheet[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2005, (11): 101-105.
Citation: ZHAOXin-yu, GANG Tie, YUAN Yuan. Ultrasonic signal analyses of spot welds in thin steel sheet[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2005, (11): 101-105.
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Ultrasonic signal analyses of spot welds in thin steel sheet

  • State key Laboratory of Advanced Welding Production Technology, Harbin Institute of Technology, Harbin 150001, China

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  • Received Date: August 31, 2005
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  • The quality of spot welds in galvanized sheet metal was evaluated by using ultrasonic water immersion focusing method. The A-scan signal, B- and C-scan image features of spot welds were analyzed. The feasibility of evaluating the quality of spot welds by using the B-scan image was provided. By using the method, not only the kiss bonding and the perfect joint could be evaluated qualitatively, but also the pressure mark depth of the upper-bottom surface and the spot weld diameter could be calculated quantitatively. The accuracy of testing result was verified by contrasting the metallographs of actual spot welds cross section.
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