انتقال حرارت و رفتارانجماد پوسته‎ای در قالب ریخته‎گری پیوسته

Heat Transfer and Deformation Behavior of Shell Solidification

in Wide and Thick Slab Continuous Casting Mold

انتقال حرارت و رفتار تغییرشکل انجماد پوسته‎ای در ورق بزرگ و ضخیم قالب ریخته‎گری پیوسته

ABSTRACT

The shell solidification in continuous casting mold is a rather complex process that is coupled with thermal and mechanical behaviors, which are related to numerous of defects occurring in slabs surface and subsurface during practical continuous casting. Intending to increase the understanding of shell thermal and mechanical behaviors in continuous casting molds to improve the casting process, numerous studies[1-13] have been conducted over the past few decades by numerical simulation. However, among these previous studies, most of the mathematical models neglected the effects of mold flux film on shell heat transfer[1-6,11] or assumed that the mold flux film distribution in shell/mold gap was uniform or changed linearly with the mold height[7-10,12,13]. It is obvious that the assumptions did not conform to the actual case of practical continuous casting that the mold flux film in mold distributes dynamically both along mold height and circumference with the evolutions of shell/mold gap and shell temperature, and affects the shell thermal and mechanical behaviors greatly.