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11 问:薄水层耦合超声波多次反射法检查钢板内分层缺陷时,水层的厚度应如何选择?答:这个问题对等级超声探伤人员来说是应该了解的基础知识。我们知道在用探头水层耦合检查钢板时,探头的保护膜、水层以及钢板这3层介质组成了
11 Q: How to choose the thickness of water layer when the thin layer coupled ultrasonic multiple-reflection method is used to check the delamination in the steel sheet? A: The problem is the basic knowledge that the ultrasonic flaw detector should know. We know that in the water coupled with the probe probe plate, the probe protective film, water layer and the steel layer of the three layers of media