Longitudinal crack on slab surface at straightening stage during continuous casting using finite element method  

作　　者：喻海良 刘相华 

机构地区：[1]State Key Laboratory of Rolling and Automation,Northeastern University [2]Department of Mechanical Engineering,Tsinghua University

出　　处：《Journal of Central South University》2010年第2期235-238,共4页中南大学学报（英文版）

基　　金：Project(50634030) supported by the National Natural Science Foundation of China;Project(20090042120005) supported by the Doctorate Foundation of the Ministry of Education of China;Project(2006CB605208-1) supported by the State Basic Research Program of China

摘　　要：Deformation behavior of slab at the straightening stage during continuous casting was simulated by the explicit dynamic finite element method,and the stress distribution along the width direction of the slab and its change regularity at slab center during continuous casting were obtained.The influence of distribution and change of stress on the propagation of longitudinal cracks on slab surface was discussed.The results show that the tensional stress appears on slab surface at the inner arc side and the compressive stress appears on slab surface at the outer arc side at stages 6-8 in straightening zone during continuous casting.Longitudinal cracks generally appear on slab top surface and do not appear on slab bottom surface,which are also observed in industry.Deformation behavior of slab at the straightening stage during continuous casting was simulated by the explicit dynamic finite element method, and the stress distribution along the width direction of the slab and its change regularity at slab center during continuous casting were obtained. The influence of distribution and change of stress on the propagation of longitudinal cracks on slab surface was discussed. The results show that the tensional stress appears on slab surface at the inner arc side and the compressive stress appears on slab surface at the outer arc side at stages 6-8 in straightening zone during continuous casting. Longitudinal cracks generally appear on slab top surface and do not appear on slab bottom surface, which are also observed in industry.

关 键 词：continuous casting slab STRAIGHTENING longitudinal crack finite element method 

分 类 号：TF777[冶金工程—钢铁冶金] TF777.1