The defects in the cold rolling roll detected by ultrasonicflawdetector are mainly the cracking defects, the non-metallic inclusions plays an important role for producing the cracking defects.
冷轧辊坯超声波探伤超标的主要原因是裂纹性缺陷，非金属夹杂物对裂纹性缺陷的产生起到了重要的作用。
2
The principle of detector is that the A-Scan flaw instrument of USL32 beams the ultrasonic to detect the bar material with the method of pulse echo once.
该系统采用A型超声波探伤仪产生超声波脉冲，采用一次脉冲反射法检测棒材。
3
This paper studied the feasibility of determining and comparing the thermal shock construction damage of refractory by ultrasonicflawdetector.