Abstract：For analyzing the reason of disqualification of Q345R steel plate by ultrasonic detection, the research on macrostructure, microstructure, SEM and fracture are carried out. The results showed that the main reason was the microcrack induced by Aggregation of MnS and Nitrides as well as the martensite and bainite in the center of plate，in the meanwhile some process improvement measures are put forward
谭清元. Q345R钢板超声波探伤不合的原因分析[J]. 钢铁, 2011, 46(3): 66-70.
Qing-Yuan Tan. Reason Analysis on disqualification of Q345R Steel Plate by Ultrasonic Detection. Iron and Steel, 2011, 46(3): 66-70.
2011, Vol. 46 
