1.School of Material Science and Engineering ,Beijing University of Science and Technology ,Beijing 100083,China��2. Linfen Iron & Steel Co, Taiyuan Iron & Steel Group Co, Linfen 041000��Shanxi. China
Abstract��The surface defect on medium and heavy plate Q235B was investigated by means of the optical microscopy��scanning electron microscopy and energy spectrum analysis in this paper. The results show that the deoxidizing process of molten steel was imperfectly and a great amount of non��metallic inclusions and particle of iron oxide existed around the defects. Evidently, the reason of the bubble defects were non��metallic inclusions and bubbles formed in continuous casting slab, which expand during reheating and rolling. The surface defect belongs to bubble defect. The improvement measures for elimination of these defect are proposed.
��˫ϼ;�ｨ��;��ƽԭ;�����. Q235B�к���������ȱ���γɻ����о�[J]. �й������ڿ���, 2008, 26(1): 14-0.
DUAN Shuang��xia;SUN Jian��lin;FU Ping��yuan;ZANG Xiao��jun. Analysis on Formation Mechanism of Surface BubbleDefect of Q235B Plate. Chinese Journal of Iron and Steel, 2008, 26(1): 14-0.
2008, Vol. 26 
