Influence of Spraying Intensity on Solidification Structure of Continuous Casting Billet During Secondary Cooling
ZHU Shi-li1,2, ZHENG Guo-qu1, YE Jian-song2, HU Wen-hao2, CAO Hua-zhen1
1. College of Chemical Engineering and Materials Science， Zhejiang University of Technology， Hangzhou 310032，Zhejiang， China 2. Technology Center， Hangzhou Iron and Steel Group Co.， Hangzhou 310022， Zhejiang， China
Abstract：The relationship between spraying intensity and casting parameters was derived during secondary cooling of continuous casting, and the solidification structures of billets with two different sections were compared under different spraying intensities. The results showed that it was more accurate to express the relationship between solidification structures of billet and cooling parameters by using spraying intensity. Dendrite arm spacing was about 20 μm in the surface of billets and about 200-350 μm in the centre. The dendrites in diagonal area were tinier than those in lateral area at the same distance from surface of billet. Under the similar spraying intensity, the rules of solidification for billets showed that the structures in centre area were tiny for billets with cross-section of 200 mm×200 mm, but tiny structures existed in areas close to centre for billets with cross-section of 150 mm×150 mm. During solidification of billets, the left curve of solidification laws was obeyed basically from surface to center, but it was the right curve for centre area and areas close to centre when the cross-sections of billets were larger than 200 mm×200 mm.
朱施利 郑国渠 叶健松 胡文豪 曹华珍. 二冷喷淋强度对连铸坯凝固组织的影响[J]. 钢铁, 2014, 49(8): 48-53.
ZHU Shi-li,, ZHENG Guo-qu, YE Jian-song, HU Wen-hao, CAO Hua-zhen. Influence of Spraying Intensity on Solidification Structure of Continuous Casting Billet During Secondary Cooling. Iron and Steel, 2014, 49(8): 48-53.
2014, Vol. 49 
