钢管水浸超声检测中45°横波折射角的调整方法

ASTM E213《金属管材超声波检验的标准操作方法》规定，为了扫查到整个钢管壁厚，必须保证超声波探头要能够在管材或者管壁中产生一个波束中心近似45°的横波。为解决水浸自动超声设备的检测方法问题，需要对横波折射角度进行精准控制。介绍了水声程调节法、外伤二次声程调节法两种技术，达到了精确调整声束在钢管中的横波折射角度的目的。

Adjustment methods of 45° shear wave refraction angle in steel pipe immersion ultrasonic flaw detection

The ASTM E213 Standard Practice for Ultrasonic Testing of Metal Pipe and Tubing stipulates that, the ultrasonic probe must be able to generate a transverse wave with a beam center of approximately 45° in the pipe or pipe wall to scan the entire steel pipe wall thickness. In order to solve the detection problem of automatic ultrasonic inspection equipment for water immersion, the shear wave refraction angle should be precisely controlled. Two technologies including water acoustic path regulation method and secondary path adjustment method were introduced for accurately adjusting the shear wave refraction angle of acoustic beam in steel tube.