薄钢板点焊接头超声信号分析  

Ultrasonic signal analyses of spot welds in thin steel sheet

作　　者：赵新玉[1] 刚铁[1] 袁媛[1] 

机构地区：[1]哈尔滨工业大学现代焊接生产技术国家重点实验室,哈尔滨150001

出　　处：《焊接学报》2005年第11期101-105,共5页Transactions of The China Welding Institution

摘　　要：采用水浸超声聚焦直入射法对镀锌薄钢板点焊接头进行了质量评价。详细分析了点焊接头的A扫描信号、B扫描及C扫描图像特征,探讨了沿焊核直径B扫描评价焊点质量方法的可行性。研究结果表明,采用这种方法不但可以定性评价虚焊接头与完好接头,还可以定量计算出上下表面压痕深度及熔核直径。对比沿焊核直径B扫描图像与横截面的金相图像,两者吻合较好,证实了检测结果的准确性。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.

关 键 词：超声检测 水浸聚焦 电阻点焊 

分 类 号：TG115.285[金属学及工艺—物理冶金]