Journal of Northeastern University ›› 2013, Vol. 34 ›› Issue (9): 1265-1267.DOI: -

• Materials & Metallurgy • Previous Articles     Next Articles

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

QIU Yiqing, CHEN Wei, LIU Xuekai   

  1. 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
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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

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