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| Factors Effecting Surface Quality of HypoPeritectic Steel Slab Cast at High Speed |
| ZHAO Heming,WANG Xinhua,ZHANG Jiongming |
| School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China |
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Abstract In order to improve surface quality of hypoperitectic steel slab cast at high speed, several factors, such as overheat temperature, ratio of manganese and sulphur, temperature of mold copper plate, average heat flux and powder properties are discussed. It is easy to cause longitudinal cracks in and depressions on slab cast with high overheat and strong secondary cooling. With the increase of casting speed, there is a tendency to make depressions. Depressions are appeared on inner side than on outer side of the slab. The longitudinal cracking is promoted by uneven heat flux, the average heat flux and temperature of copper pates are important factors for cracking. Compared with using powder of lower basicity, using powder of higher basicity can reduce heat flux and temperature of copper plate, realize soft cooling, make solidified shell uniform and improve surface quality of slab.
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Received: 01 January 1900
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| [1] |
GUO Junli，WEN Guanghua，FU Jiaojiao，TANG Ping，GU Shaopeng. Evaluation of carbon equivalent calculation of continue#br#
casting steel based on surface roughness[J]. Iron and Steel, 2019, 54(8): 187-193. |
| [2] |
ZHANG Zhi-ming，XIE Jie-zhi，AO Yong-ming，WAN Xiang，WEI Qian-yong. Control and analysis of causes of indentations on billets of free cutting steel[J]. , 2019, 44(1): 22-27. |
| [3] |
ZHANG Zheng-lin， WANG Xiang-hong. Control of longitudinal surface crack of tube steel A29[J]. , 2018, 43(6): 71-73. |
| [4] |
YU Xue-cheng，LIU Feng-gang，MA Wei，NI You-jinZHU Jian-qiang，LIU Guo-liang. Development and application of chamfer mould in Shougang Qian’an Steel[J]. , 2018, 43(5): 75-79. |
| [5] |
FAN Jian-wen，ZHAO Jun-pu，YAO Tong-lu，YU Gui-ling. Crack analysis near corner concaved surface of continuous casting bloom of high carbon chromium bearing steel[J]. , 2018, 43(1): 59-64. |
| [6] |
LI Jian-quan，WU Guo-rong，DAI Yong-zhong. Study on reducing longitudinal surface crack of medium carbon manganese steel bloom during continuous casting[J]. Chinese Journal of Iron and Steel, 2016, 41(4): 41-46. |
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2006, Vol. 41 