(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education,Wuhan University of Science and Technology, Wuhan 430081, Hubei, China)
Abstract:By the means of scanning electron microscope (SEM), Metallographic analysis and energy spectrum analysis, the linear defects of SPHC were studied. The cluster Al2O3 inclusions resided in liquid steel to be the crack source before the soaking, then were crushed in rolling process and formated long chain line defect. The linear defect were covered in galvanized process, so as to form the galvanized sheet line defect.