当前主要规范均不包括对于铁素体薄壁对接焊缝(壁厚为3~6mm)的超声检测方法及质量等级要求,为此基于相控阵超声检测原理,利用声场仿真技术,研究相控阵超声检测技术在铁素体薄壁管对接焊缝上的应用,并总结其关键参数。采用所设计的相控阵超声探头及检测工艺对含有大量缺陷的铁素体薄壁模拟试件进行检测,并与铁素体薄壁对接焊缝的射线检测结果进行对比,总结出了铁素体薄壁焊缝相控阵超声检测的验收准则。

The current main specifications do not include requirements for the detection method and quality level of ferritic thin-wall butt welds (wall thickness 3~6 mm). This article starts from the phased array detection principle and uses sound beam simulation to analyze its detection process, The sound field simulation and analysis of phased array probe parameters are used to summarize the phased array detection process of ferrite thin-wall butt welds. The designed phased array probe and process are used to measure the simulated specimens containing a large number of natural defects. At the same time, the sound field simulation is used to calculate the simulated specimen defects, and the results of the two methods are compared, so as to conclude that the ferrite thin-wall welding acceptance criteria for seams.