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超声波探伤所需深平底孔的孔底平整度,一般自制单位缺少专门计量器具,难以精确计量和修理校准。我们采用理论计算值与实测值相比较后修整校准的办法,解决了此难题。即通过理论计算平底孔底应有反射分贝数与超声探伤仪实测平底孔底反射分贝数的比较,如有较大差值,进行反复扩平自制试块平底孔底
Deep flat bottom hole required for ultrasonic flaw hole bottom flatness, the general self-made units lack of specialized measuring instruments, it is difficult to accurately measure and repair calibration. We use the theoretical calculation of the measured value compared with the trim calibration method to solve this problem. That is, through the theoretical calculation of flat bottom hole should have the reflection decibel and ultrasonic flaw detector flat bottom hole bottom reflection decibels comparison, if larger difference, repeated flattening homemade flat bottom hole