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Heat Transfer and Its Effect on Solidification in combined mould

Journal of Iron and Steel Research(International) 2005年第6期12卷 20-22,36页

作者： QIU Sheng-tao TAO Hong-biao TANG Hong-wei ZHANG Hui ZHAO Pei Central Iron and Steel Research Institute Beijing 100081 China

The nucleation can be enhanced by decreasing the superheat of molten steel, thus reducing temperature gradient on the solidification front can retard the growth of columnar crystals and enlarge the equiaxed zone in continuous casting strand. The billets with equiaxed zone more than 90% were cast with a combined mould and the heat flux was measured. The heat transfer of the combined mould and traditional mould was compared. The resuits show that under same casting conditions, the temperature gradient on the solidification front in the combined mould is smaller than that in traditional mould at a distance within 0-150 mm from the meniscus.

关键词： combined mould heat transfer temperature gradient equiaxed zone

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Research on the Mechanism of Heat Transfer in the Process of Solidification of Molten Steel in the combined Mold

Research on the Mechanism of Heat Transfer in the Process of...

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第二届先进钢铁结构材料国际会议

作者： TAO Hongbiao QIU Shengtao TANG Hongwei ZHANG Hui ZHAO Pei(Central Iron and Steel Research Institute Beijing 100081 China)

＜正＞The formation of crystal nucleus can be facilitated by decreasing degree of superheat of molten steel, based on which reducing temperature grads on the front edge of solidified shell can retard the growth of columnar grain in the continuous casting mold so that the proportion of equiaxial grain can be increased. Based on above principle,billets whose proportion of equiaxial crystal are more than 90% have been casted and the heat flux of combined mold has been *** heat transfer character of combined mold and traditional mold has been *** results show that on the same casting conditions the temperature grads on the front edge of solidified shell in the combined mold are smaller than that in the traditional mold at the same height within 0～150 millimeter from the meniscus of molten steel.

关键词： combined mould Heat Transfer Temperature Grads Proportion of Equiaxial crystal

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