Abstract��High rejection rate of ultrasonic non��destructive testing was found for a batch of hot��rolled bridge plates. The reasons for disqualification of plates were investigated by means of in��situ composition analysis, metallography, scanning electron microscope and microhardness analyses. It was found that bainite appears at the center position of the bridge plates, due to the stabilisation of austenite caused by the severe segregation of C, S etc. Bainite is the main reason for disqualification of the plates.
�¾�;����;�����;������;��Ⱥ. ���̽�˲��ϸ�ԭ��ķ���[J]. �й������ڿ���, 2006, 24(6): 34-0.
WEN Juan;LUO Jia��ming;LIU Xiao��lan;YIN Li��xin;REN Qun. Analysis of Reasons for Detection Disqualification of Plates. Chinese Journal of Iron and Steel, 2006, 24(6): 34-0.
2006, Vol. 24 
