【摘要】 为了获得水平偏振横波(SH波),研制开发了基于2-2压电复合晶片的SH波斜探头。通过研制的SH波探头对小口径奥氏体不锈钢管标准试块和对比试块进行测试对比试验,研究其声衰减及信噪比特性。试验结果表明,基于2-2压电复合晶片的SH波探头可实现对小口径奥氏体不锈钢管焊缝缺陷的检测,且具有较高的检测灵敏度和信噪比。更多还原

【Abstract】 In order to achieve horizontally-polarized shear wave(SH wave),SH wave angle transducers with 2-2piezoelectric composite chips has been developed.A small diameter austenitic stainless steel tube calibration block and reference block with artificial defects are tested by the developed SH wave probe to study the attenuation and signal to noise ratio of SH wave.Experimental results show that SH wave based on 2-2piezoelectric composite chips can achieve the purpose of testing defects in weld of small diameter austenitic stainless steel tube.The defect detection sensitivity and the signal-to-noise ratio are relatively high.更多还原