为提高大型钢结构件的大板梁所有焊接接头超声检测速度,采用相控阵UT以电子扫描技术取代常规UT中探头的机械移动。本文根据有关工业标准要求,通过校验试块的验证试验,探讨分析相控阵超声检测在这方面的实际有效探伤条件。试验表明:只要正确设定五参数(声束聚焦位置、同时激励的阵元数、有效探伤范围、脉冲重复频率及探伤数据压缩比),可明显提高钢结构件焊接接头相控阵UT的检测效率。 In order to improve the ultrasonic testing speed of all the welded joints of large steel beams and plates, phased array UT is adopted to replace the mechanical movement of the probe in conventional UT with electronic scanning technology. In this paper, according to the requirements of the relevant industry standards, through the verification test block verification test, analysis and analysis of phased array ultrasonic testing in this area effective detection conditions. The test results show that as long as the five parameters (the focus position of the acoustic beam, the number of excited elements, the effective detection range, the pulse repetition frequency and the compression ratio of the flaw detection data) are set correctly, the detection of the UT of the welded joint of the steel structure part effectiveness.