Analysis on the Spot Defects of Q235B Steel in CSP Process
YANG Yi1,2�� LIU Yang1�� HAN Bin1�� TAN Wen1�� WEI Bing1
��1. Research and Development Centre of Wuhan Iron and Steel Group Co., Wuhan 430080, Hubei, China 2. The State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110004, Liaoning, China
Abstract��During the Q235B steel production of CSP process, the spot defects were founded on the strip surface. Through the EPMA, SEM, EDS and metallographic analysis combined with?the?CSP rolling process, the spot defects?formation of Q235B steel are comprehensively analyzed. The results show that: in the heating process, the higher carbon is easier to decarbonization in oxidizing atmosphere and produce CO and CO2, which cause blister on the surface of oxidation scale. It is difficult to remove in descaling process. In the rolling process, the blister is rolled and form spot defects.
�ո�����: 2013-07-03
��������: 2014-09-24
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E-mail: yangyi_2008@aliyun.com
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�� ��.�� �� �� �� �� ̷ �ģ� κ ��. CSP����Q235B�ֵ�״ȱ�ݷ���[J]. �й������ڿ���, 2014, 32(5): 44-48.
YANG Yi�� LIU Yang�� HAN Bin�� TAN Wen�� WEI Bing. Analysis on the Spot Defects of Q235B Steel in CSP Process. Chinese Journal of Iron and Steel, 2014, 32(5): 44-48.
2014, Vol. 32 
