通过枝晶间距反求薄带连铸界面的热流

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东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (9): 1265-1267.DOI: -

通过枝晶间距反求薄带连铸界面的热流

邱以清，陈伟，刘学凯

(东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳110819)

收稿日期:2012-12-26 修回日期:2012-12-26 出版日期:2013-09-15 发布日期:2013-04-22
通讯作者: 邱以清
作者简介:邱以清(1962-)，男，山东滕州人，东北大学副教授.
基金资助:
国家自然科学基金资助项目(51004035).

Reversing Calculation of Interface Heat Flux for Strip Casting Though Dendrite Arm Spacing

QIU Yiqing， CHEN Wei， LIU Xuekai

State Key Laboratory of Rolling and Automation， Northeastern University， Shengyang 110819， China.

Received:2012-12-26 Revised:2012-12-26 Online:2013-09-15 Published:2013-04-22
Contact: QIU Yiqing
About author:-
Supported by:
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摘要/Abstract

摘要： 根据导热微分方程，推导出了在二次枝晶间距基础上计算双辊薄带连铸界面传热热流的数学解析式，并以1Cr18Ni9Ti不锈钢作为研究对象，进行了数值计算.数值计算结果表明，随着凝固时间的增加，界面热流密度呈下降趋势；在弯月面附近热流密度下降速度很快，越靠近Kiss点，热流密度下降速度越慢；薄带连铸界面热流密度的计算数值与文献所报道的实验数据在同一个数量级上.此外，进一步的计算还表明，双辊薄带连铸属于亚快速凝固过程，这与实际情况是一致的.

关键词: 双辊薄带连铸, 界面传热热流, 数学解析式, 二次枝晶间距, 亚快速凝固

Abstract: According to heatconduction differential equation， the mathematical expression， by which interfacial heat flux during twinroll strip casting can be calculated on the basis of secondary dendrite arm spacing， was derived. The numerical calculation was carried out though this mathematical expression， taking 1Cr18Ni9Ti stainless steel as an research calculated object. The results showed that the density of the interfacial heat flux decreases with the increase of the solidification time， the declining rate of interfacial heat flux is very fast near meniscus， while is slower in the position from nearer Kiss point. The calculated interfacial heat flux density is of the same order of magnitude as that of the experimental data in the literature. In addition， the further calculation indicated that twinroll strip casting is a subrapid solidification process， which conforms to the actual situation.

Key words: twinroll strip casting, interfacial heat flux, mathematical expression, secondary dendrite spacing, subrapid solidification

中图分类号:

TF7777

邱以清，陈伟，刘学凯. 通过枝晶间距反求薄带连铸界面的热流[J]. 东北大学学报(自然科学版), 2013, 34(9): 1265-1267.

QIU Yiqing， CHEN Wei， LIU Xuekai. Reversing Calculation of Interface Heat Flux for Strip Casting Though Dendrite Arm Spacing[J]. Journal of Northeastern University, 2013, 34(9): 1265-1267.

参考文献

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[2] Guthrie R I L，Isac M，Kim J S，et al.Measurements，simulations，and analyses of instantaneous heat fluxes from solidifying steels to the surfaces of twin roll casters and of aluminum to plasmacoated metal substrates［J］.Metallurgical and Materials Transactions B，2000，31(5):1031/1047.
[3] Blejde W，Mahapatra R，Fukase H.Application of fundamental research at project ‘M’［J］.Iron and Steelmake，2001，28(2):43/48.
[4] Strezov L，Herbertson J.Experimental studies of interfacial heat transfer and initial solidification pertinent to strip casting［J］.ISIJ International，1998，38(9):959/966.
[5] Strezov L，Herbertson J，Belton G R.Mechanisms of initial melt/substrate heat transfer pertinent to strip casting［J］.Metallurgical and Materials Transactions B，2000，31B(5):1023/1030.
[6] Spinelli J E，Tosetti J P，Santos C A，et al.Microstructure and solidification thermal parameters in thin strip continuous casting of a stainless steel［J］.Journal of Materials Processing Technology，2004，150:255/262.
[7] 梁高飞，张卫，于艳，等.薄带连铸Kiss点前界面热流模型与凝固过程［J］.上海交通大学学报，2008，42(9):1401/1404.(Liang Gaofei，Zhang Wei，Yu Yan，et al.Investigation on interfacial heat flux modes and solidification process before Kiss point during strip casting［J］.Journal of Shanghai Jiaotong University，2008，42(9):1401/1404.)
[8] 胡汉起.金属凝固原理［M］.北京:机械工业出版社，1995:144.(Hu Hanqi.Metal solidification principle［M］.Beijing:China Machine Press，1995:144.)

通过枝晶间距反求薄带连铸界面的热流

Reversing Calculation of Interface Heat Flux for Strip Casting Though Dendrite Arm Spacing

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