In allusion to the problem that detects existed in the Q460E medium steel plates by flaw detection by Ansteel,the causes leading to the defects of entrapped slag and cracks in continuously casting steel plates and moulded casting steel plates were analyzed by means of SEM composition analysis,inspecting entrapped slag inclusions and macroscopic examination in a way of acid pickling,and the improvement measures were formulated.By comparing and classifying the main standards for medium steel plates by flaw detection at home and abroad,the defects by flaw detection were classified into eight quality grades.According to the statistics of the proportions of steel plates with different quality grades before and after the implementation of the improvement measures,it was concluded that the proportion of steel plates with the best quality grade increased significantly,and the internal quality of steel plates improved remarkably.
关键词
Q460E中厚板/夹渣缺陷/裂纹缺陷/质量等级
Key words
Q460E medium steel plates/entrapped slag defect/crack defect/quality grade
维普
万方数据