基于覆材侧的不锈钢复合板球罐超声波衍射时差法检测

TOFD detection of stainless steel composite plate spherical tank based on cladding side

摘要: 针对不锈钢复合板球罐在制造和使用过程中容易出现的各类缺陷，采用基于覆材侧的超声波衍射时差法（TOFD）检测，通过CIVA软件仿真TOFD检测工艺，再用对比试块验证工艺的可靠性，最后采用该检测工艺对一台体积为500 m³的不锈钢复合板球罐进行现场检测。结果表明：基于覆材侧的检测工艺可有效减小不锈钢复合板TOFD检测的盲区覆盖范围，具有较高的信噪比，对于开展不锈钢复合板球罐覆材侧TOFD检测具有一定的指导意义。

Abstract: In view of various defects in the manufacturing and use of stainless steel composite plate spherical tank, TOFD detection technology based on the cladding side is adopted, and the TOFD detection technology is simulated by CIVA software, and the reliability of the process is verified by the comparison with the test block. Finally, a 500 m³ stainless steel composite plate spherical tank is tested on site by this detection technology. The results show that the detection technology based on the cladding side can effectively reduce the blind area coverage of TOFD detection of stainless steel clad plate, and has a high signal-to-noise ratio, which has a certain guiding significance for the development of TOFD detection of the cladding side of stainless steel clad plate spherical tank in the cladding side.