Abstract��A large quantities of heavy plates were substandard by ultrasonic testing, and the cracked billet was analyzed by means of metallurgical microscope, scanning electron microscopy and electron microprobe. The results show that there was a lot of large size slag, segregation bands and cracks in substandard parts of the plate. The analysis concludes that the large size slag and segregation bands resulted in crack in the casting and rolling, and the large size slag and crack will both cause the substandard plates by ultrasonic testing.
�� �����ƺ��������أ�����ǿ. �к��̽�˼�ⲻ�ϸ��ԭ�����[J]. �й������ڿ���, 2015, 33(2): 26-30.
LIU Min��HUANG Hai-e��WANG Jun-lin��SUN Yi-qiang. Causes analysis on substandard heavy plates by flaw detection. Chinese Journal of Iron and Steel, 2015, 33(2): 26-30.
2015, Vol. 33 
