压力容器用中厚板Q345R探伤不合格原因分析

Analysis on Disqualification of Q345R Medium Steel Plate for Pressure Vessel in Ultrasonic Detection

针对Q345R钢板探伤不合格问题,从生产过程、金相检验、扫描电镜检测等方面进行分析,结果表明钢中的夹杂物、中心裂纹是造成探伤不合格的主要原因。通过优化相关的生产工艺,可以避免探伤不合格现象的产生,对提高Q345R钢板探伤合格率起到关键作用。

For the disqualification problem of Q345R steel plate in ultrasonic detection, analysis is performed from the aspects of production process, metallographic examination, SEM testing. The analysis results show that inclu-sions and center cracks are the major causes of disqualification in ultrasonic detection. By optimizing relevant produc-tion process, disqualification problems in ultrasonic detection can be prevented, which plays a key role in improving the qualification rate of Q345R steel plate in ultrasonic detection.