连铸过程中板坯角部可能出现横向裂纹,这些裂纹严重影响着连铸坯的质量和产量.采用显式动力学有限元方法对连铸矫直阶段连铸板坯表层金属应力变化规律进行了模拟.分析了角部应力的变化规律,并对矫直过程中连铸板坯应力分布对角部横向裂纹的影响进行了讨论.研究发现在连铸过程扇形段6～8段处连铸坯内弧侧表面出现较大的拉应力,可能促使裂纹扩展.研究结果对指导连铸生产具有重要的实际意义和理论意义.
The transversal cracks might appear on slab corner positions during continuous casting,which severely affect the quality and quantity of products.The behavior of slab in the straightening period during continuous casting,and the stress distribution on slab surface and the change regularity of stress on slab corner were obtained by dominant kinetics finite element method,finally the influence of stress distribution on slab on the initiation of transversal cracks on slab corner was discussed.Results show that the tensile stress appears on slab surface of inner arc side when the slab passes through the stage 6-8 during continuous casting.The research results are good for guiding the production.
参考文献
| [1] | 职建军.宝钢连铸板坯角横裂缺陷的改善[J].钢铁,2001(01):22-24. |
| [2] | 辛建卿,岳尔斌.Q345B钢连铸坯角裂形成原因分析[J].炼钢,2007(06):16-19. |
| [3] | 刘相华,喻海良,李长生,草场芳昭.立-平轧制过程轧件角部裂纹的扩展与愈合[J].自然科学进展,2006(01):124-128. |
| [4] | Yu H L;Liu X H;Wang G D .Analysis of Crack Tip Stress of Transversal Crack on Slab Corner During V-H Rolling Process by FEM[J].Journal of Iron and Steel Research International,2008,15(03):19. |
| [5] | Yukawa N;Ishikawa T;Yoshida Y .Influence of Rolling Con dition on Deformation of Surface Micro-Defect in Plate Rolling[J].Tetsu To Hagane-Journal of the Iron & Steel Institute of Japan,2005,91(12):861. |
| [6] | Ludwig A .Thermophysical Properties Necessary for Advanced Casting Simulation[J].International Journal of Theoretical Physics,2002,23(05):1131. |
| [7] | Seyedein S H;Hasan M .A 3-D Numerical Prediction of Turbulent Flow,Heat Transfer and Solidification in a Continuous Slab Caster for Steel[J].Canadian Metallurgical Quarterly,1998,37(03):213. |
| [8] | Ravichandran KS. .THREE-DIMENSIONAL CRACK-SHAPE EFFECTS DURING THE GROWTH OF SMALL SURFACE FATIGUE CRACKS IN A TITANIUM-BASE ALLOY[J].Fatigue & Fracture of Engineering Materials and Structures,1997(10):1423-1442. |
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