板坯中间裂纹产生的原因及预防措施.pdf

2005 3 鞍钢技术 333 AN AN TECHNOLO Y 41 1 2 ( 1. 本溪钢铁集团公司　2.鞍山科技大学) , , , Reasons Leading to Center Crack in Slab and Preventive Measures 1 2 Tong Xin Li Rong ( 1.Benxi Iron and Steel roup Co. 2.Anshan Science and T echnology University) Abstract Reasons leading to center cracks in slabs are discussed through studying their appearance rules and forms based on the production data of process in the Steelmaking Plant of .. , , . Benxi Iron and Steel Co Intergranular segregation of impurity elements such as S P etc are considered to be internal reason causing center cracks and roll gap second rolling sys-, , tem, stretching speed and molten steel overheating degree to be outer reasons leading and spreading cracks. The corresponding control measures are advanced. Key Words slab center crack molten steel overheating degree 0 1600)mm; , : 1.01.6m/ min; : 2004 : ; , 013 : 7 ; , , :; , : 1 2 : ; 2. 1 : 10m; :31.4m; , :; , : 900mm; , : ( 210230250) mm ( 800