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| Optimization and practice of final electromagnetic stirring of No.80 steel continuous casting billet |
| MA Jian-min |
| School of Mechanical and Automotive Engineering, Xuchang Vocational Technical College, Xuchang 461000, Henan, China |
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Abstract The poor internal quality of No.80 steel billet was analyzed, it was found that the magnetic induction strength of the final electromagnetic stirring (FEMS) was weak itself, which was difficult to meet the needs of the final stirring metallurgy. In order to make up for the lack of FEMS strength, the pulling speed was increased from 2.6 to 2.7 m/min, and the specific cooling water volume was reduced to 90% of the original process. The solidification heat transfer model showed that the liquid core thickness at the FEMS position was increased from the original 47.6 to 52.8 mm. The test result showed that no obvious defects were found on the pickled surface of billet, and the macroscopic structure quality was greatly improved, and the carbon segregation index range was reduced from the original 0.96-1.09 to 0.97-1.02. The internal quality of billet was significantly improved.
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Received: 08 June 2020
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| [1] |
马建超, 周青峰, 苏笃星, 等. C70DA钢小方坯末端电磁搅拌工艺的优化[J]. 炼钢, 2012,28(6): 19.
|
| [2] |
Choudhary S K, Ganguly S. Morphology and segregation in continuously cast high carbon steel billets[J]. ISIJ International, 2007, 47(12): 1759.
|
| [3] |
王兴宇, 韩延申, 刘青, 等. 末端电磁搅拌对弹簧钢连铸坯内部质量的影响[J]. 钢铁, 2020, 55(5): 59.
|
| [4] |
周力, 高书成, 蒋栋初, 等. 小方坯连铸机末端电磁搅拌位置及连铸工艺优化实践[J]. 炼钢, 2018, 34(2): 38.
|
| [5] |
毛斌, 张桂芳, 李爱武. 连续铸钢用电磁搅拌的理论与技术[M]. 北京:冶金工业出版社, 2012.
|
| [6] |
胡亮, 郭红民, 段少平. 凝固末端电磁搅拌对82B碳偏析的影响[J]. 中国冶金, 2018, 28(9): 63.
|
| [7] |
沈宏俊, 张西超, 方忠强, 等. 45钢大方坯凝固传热数值分析[J]. 炼钢, 2015, 31(4): 47.
|
| [8] |
王德炯, 焦帅, 殷皓, 等. GCr15钢大方坯传热凝固数值模拟[J]. 炼钢, 2018, 34(1): 30.
|
| [9] |
张贯旭, 杨树峰, 李京社, 等. 方坯轴承钢连铸过程中凝固行为[J]. 中国冶金, 2018, 28(增刊1): 17.
|
| [10] |
冯永山, 侯雨阳, 成国光. 70号钢连铸过程的凝固传热模型与组织研究[J]. 连铸, 2018, 43(3): 18.
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2021, Vol. 31 
