GENG Mingshan1,HE Kuangnian2，ZHANG Jiongming1, WANG Xinhua1,XIAO Jiguang2
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. Shaoguan Iron and Steel Group Co., Ltd.， Shaoguan 512123, Guangdong, China
Abstract：The formation mechanism of surface micro cracks of HSLA medium plates rolled from continuously cast slabs was studied by metallographic analysis,scanning electron microscopy and XEDS analysis.The test results show that some Cu and As are observed near the cracks and the surface micro cracks are along the grain boundaries.The main reason of surface micro crack formation is that Cu、As and Sn are segregated at the austenite grain boundaries forming Cu、As and Sn enriched phase in scale/steel interface by selective oxidation and the hot ductility of steel is deteriorated tremendously,Some countermeasures for preventing surface micro cracks are proposed.
耿明山;何矿年;张炯明;王新华;肖寄光. 中板表面微裂纹缺陷研究[J]. 钢铁, 2008, 43(4): 80-0.
GENG Mingshan;HE Kuangnian;ZHANG Jiongming;WANG Xinhua;XIAO Jiguang. Study on Surface Micro Cracks on Medium Plate. Iron and Steel, 2008, 43(4): 80-0.
2008, Vol. 43 
