| Q235小方坯连铸过程中凝固特性的研究 |
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| 引用本文： | 丁国,麻永林,吴东升.Q235小方坯连铸过程中凝固特性的研究[J].包头钢铁学院学报,2006,25(4):324-327. |
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| 作者姓名： | 丁国 麻永林 吴东升 |
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| 作者单位： | [1]内蒙古科技大学材料与冶金学院,内蒙古包头014010 [2]宣化钢铁集团有限责任公司,河北张家口075100 |
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| 摘 要： | 分析了Q235凝固时的结晶特性,柱状晶容易生长.数值计算了小方坯连铸机在2.6 m/min拉速、不同二冷配水下铸坯的温度场和凝固前沿温度梯度.在弱水冷却时,铸坯坯壳凝固前沿温度梯度比较小,得到细小的柱状晶和少量等轴晶.连铸坯中间裂纹主要与二冷水相关,合适的二冷配水可降低或消除中间裂纹.
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| 关 键 词： | 凝固 二冷配水 温度梯度 中间裂纹 方坯连铸机 连铸过程 凝固特性 研究 casting process continuous billet solidification 相关 二冷水 中间裂纹 连铸坯 等轴晶 比较 坯壳 水冷却 温度梯度 温度场 二冷配水 拉速 |
| 文章编号： | 1004-9762（2006）04-0324-04 |
| 收稿时间： | 2006-09-12 |
| 修稿时间： | 2006年9月12日 |
Research on solidification of Q235 billet in continuous casting process |
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| DING Guo,MA Yong-lin,WU Dong-sheng.Research on solidification of Q235 billet in continuous casting process[J].Journal of Baotou University of Iron and Steel Technology,2006,25(4):324-327. |
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| Authors: | DING Guo MA Yong-lin WU Dong-sheng |
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| Affiliation: | 1. Material and Metallurgy School, Inner Mongolia University of Science and Technology, Baotou 014010, China; 2. Xuanhua Iron and Steel Group Liability Co., LTD., Zhangjiakou 075100, China |
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| Abstract: | The crystal characteristic in Q235 solidifying was analysed and it is found that the eolummar crystals develop easily. Billet temperature field and temperature gradient in the front of solidifying shell were computed under the condition of 2.5 m/min casting speed for different secondary water strategy. Temperature gradient is rather small at the head of shell during soft water cooling; the thinner columnar crystals and a small amount of the equiaxed grain ean be obtained. Midway eraek is severely influenced by the seeondary cooling water and the suitable soft rate of the soft secondary cooling water can either reduce or eliminate the midwav crack. |
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| Keywords: | solidification secondary cooling water rate temperature gradient midway crack |
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