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	连铸结晶器内大方坯的热力耦合分析
	陈永 ; 罗歆 ; 沈厚发 ; Chen Yong ; LUO Xin ; Shen Houfa
	2010-07-15 ; 2010-07-15
会议名称	第四届发展中国家连铸国际会议 ; CNKI
关键词	大方坯连铸 结晶器 传热 热力耦合分析 有限元 continuous bloom casting mold heat transfer thermomechanical analysis finite element method TF777.2
其他题名	Analysis of Thermomechanical Behavior in Continuous Bloom Casting Mold
中文摘要	针对攀钢大方坯连铸机投产初期铸坯表面角部纵裂缺陷,建立了大方坯连铸结晶器内铜板与铸坯间的热力耦合模型,并应用模型分析了大方坯连铸结晶器内的传热过程和坯壳的应力分布。在传热模型中,以稳态模型分析结晶器的传热过程,以瞬态模型分析铸坯的传热过程:在力学模型中,考虑铸坯和结晶器的接触边界以处理结晶器角部的气隙,以热弹塑性模型分析铸坯的变形和应力场。两种结构的连铸结晶器中大方坯温度场和应力场计算结果表明,结晶器倒角从25mm×45°变为12mm×45°时,可改善铸坯角部的传热条件,降低凝固坯壳角部温度,增加凝固坯壳厚度,有利于减轻和防止铸坯角部裂纹。; The longitudinal comer surface crack occurred at the initial production stage of continuous bloom caster at Pangang.Therefore,a thermomechanical model was developed to analyze the heat transfer and the stress distribution of strand in the continuous bloom casting mold.The heat transfer in the mold and the strand was analyzed with the steady model and the transient model,respectively.The contact of the mold and strand was taken into account in the mechanical model to treat the air gap formation in the mold comer,and the strain as well as stress of strand were analyzed with thermal elasto-plastic model.The results of the temperature and stress distribution in continuous bloom casting with two different mold configurations show that the comer size has a great effect on heat transfer near the strand shell corner. When the comer size is optimized from 25min�皌o 12mm��,the strand temperature becomes lower and the solidified shell thickness becomes thicker,which will reduce the cracking tendency near the strand shell comer.
语种	中文 ; 中文
内容类型	会议论文
源URL	[http://hdl.handle.net/123456789/67672]
专题	清华大学
推荐引用方式 GB/T 7714	陈永,罗歆,沈厚发,等. 连铸结晶器内大方坯的热力耦合分析[C]. 见:第四届发展中国家连铸国际会议, CNKI.

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