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连铸板坯凝固过程的应变分析
引用本文:朱国森,于会香,王新华,王万军. 连铸板坯凝固过程的应变分析[J]. 北京科技大学学报, 2004, 26(3): 251-254
作者姓名:朱国森  于会香  王新华  王万军
作者单位:北京科技大学冶金学院,北京,100083
摘    要:通过建立连铸板坯凝固过程的传热模型和采用实测温度数据进行检验,获得了铸坯温度及坯壳厚度的数据.在此基础上建立了凝固过程的应变分析模型,得到了实际工况条件下坯壳所受的拉应变.结果表明,在正常工况下,连铸坯凝固前沿所受的应变很小,铸坯不会产生内部裂纹;当导辊开口度的偏差大于2mm时,其引起的应变大于鼓肚应变,且凝固前沿所受的应变大于临界应变,内部裂纹发生的可能性很大.支撑辊对中精度是产生内部裂纹的重要影响因素.

关 键 词:板坯连铸:内部裂纹  应变  鼓肚  传热  连铸板坯  凝固过程  应变分析  Cast  Continuous  shell  影响因素  对中精度  支撑辊  发生  临界应变  鼓肚  偏差  开口度  导辊  内部裂纹  铸坯凝固  正常工况  结果  拉应变
修稿时间:2002-11-19

Strain in Solidifying shell of Continuous Cast Slabs
ZHU Guosen,YU Huixiang,WANG Xinhua,WANG Wanjun Metallurgical Engineering School,University of Science and Technology Beijing,Beijing ,China. Strain in Solidifying shell of Continuous Cast Slabs[J]. Journal of University of Science and Technology Beijing, 2004, 26(3): 251-254
Authors:ZHU Guosen  YU Huixiang  WANG Xinhua  WANG Wanjun Metallurgical Engineering School  University of Science  Technology Beijing  Beijing   China
Affiliation:ZHU Guosen,YU Huixiang,WANG Xinhua,WANG Wanjun Metallurgical Engineering School,University of Science and Technology Beijing,Beijing 100083,China
Abstract:The surface temperature and shell thickness of continuous casts slab were obtained by modeling heattransfer during solidification process. A mathematical model of strain at solid/liquid interface was set up. The strainin the solidifying shell under normal and abnormal operation conditions was gained. The results indicate that strainis small under normal operation conditions and internal cracks never happen. But when the variation of roll gap isabove 2mm, the strain caused is greater than caused by bulging. The total strain exceeds the critical one and internalcracks will appear It is of great importance to maintain the fine state of continuous casting machine to avoid the ap-pearance of internal cracks.
Keywords:continuously cast slab  internal crack  strain  bulging  heat transfer
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