Q550D凝固坯壳厚度测定研究
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摘要
为了精确掌握连铸机的综合冷却特性,优化二次冷却制度及连铸轻压下过程,结合Q550D钢生产过程中二冷各段的实际情况,采用射钉法在二冷区各段末对铸坯进行射钉取样,并利用硫印法测定铸坯在二冷区内各目标点凝固坯壳厚度。使用模拟软件建立板坯传热数学模型,与射钉实验结果进行比较,两者结果基本相符。将数学模型应用到整个铸机的传热凝固过程中,为评价连铸机综合冷却能力,优化二冷配水及轻压下制度,提高铸坯质量,为实现高效连铸提供了重要依据。
In order to master comprehensive cooling characteristics of the casting machine and optimize secondary cooling system and continuous casting soft reduction system, combined with the actual situation of each section of Q550 D secondary cooling in the production process, the slab was sampled at the end of each section in the secondary cooling zone by pin-shooting method, and the thickness of each target in the secondary cooling zone of the solidified shell was measured by the sulfur printing method. Simulation software was used to establish mathematic model of heat transfer of the slab, and the result of the calculation was consistent with that of pin-shooting method. The mathematic model was applied to the heat transfer and solidification process of continuous casting, which provided an important basis for evaluating the comprehensive cooling capacity of continuous casting machine, optimizing secondary cooling system and soft reduction system, improving the quality of slab and realizing high-efficiency continuous casting.
In order to master comprehensive cooling characteristics of the casting machine and optimize secondary cooling system and continuous casting soft reduction system, combined with the actual situation of each section of Q550 D secondary cooling in the production process, the slab was sampled at the end of each section in the secondary cooling zone by pin-shooting method, and the thickness of each target in the secondary cooling zone of the solidified shell was measured by the sulfur printing method. Simulation software was used to establish mathematic model of heat transfer of the slab, and the result of the calculation was consistent with that of pin-shooting method. The mathematic model was applied to the heat transfer and solidification process of continuous casting, which provided an important basis for evaluating the comprehensive cooling capacity of continuous casting machine, optimizing secondary cooling system and soft reduction system, improving the quality of slab and realizing high-efficiency continuous casting.
引文
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[2]曹磊.宽厚板连铸动态轻压下工艺[J].中国冶金,2015,25(1):45-49.
[3]兰鹏,李鹏善,刘春秀,等.基于凝固数值模拟的13t扁锭结构设计与优化[J].中国冶金,2014,24(10):22-31.
[4]张富强,王新华.连铸板坯二冷区宽度方向不均匀冷却的研究[J].钢铁,2006(9):30-32.
[5]王文军,朱志远,李战军,等.连铸厚板坯轻压下技术的应用[J].钢铁,2012,47(3):20-24.
[6]张春杰,孙玉虎,郑伟栋,等.射钉法测量板坯凝固坯壳厚度的应用实践[J].连铸,2011(3):28-30.
[7]钟婧.低合金高强度钢连铸板坯热送过程中温度控制的模拟研究[D].重庆:重庆大学,2014.
[8]蔡开科,程士富.连续铸钢原理与工艺[M].北京:冶金工业出版社,1994.
[9] Zhang Daojie, Song Lei, Shan Zeng,et al. Thermo-mechanical modeling in continuous slab casting mould and its application[J].ISIJ International, 2014, 54(2):336-341.
[10]王宏明,徐明喜,王俊杰,等.提高连铸热送板坯温度的传热模型研究[J].连铸,2005(5):1-4.
[11]张国俊,孙志平,邹丽艳.铸造过程数值模拟的应用与展望[J].热加工工艺,2010,39(21):61-64.
[12]薛莉,毛红奎,徐宏,等.铸造充型过程的数值模拟研究现状及发展[J].热加工工艺,2010,39(3):80-84.
[13] Du Fengming, Wang Xudong, Man Yao,et al. Analysis of the non-uniform thermal behavior in slab continuous casting mold based on the inverse finite-element model[J]. Journal of Materials Processing Technology, 2014, 214(11):2676-2683.
[14]魏巍.板坯连铸结晶器内流场和温度场的研究[D].秦皇岛:燕山大学,2009.
[15]邹达基,邹宗树.关于连铸凝固传热数值模拟中钢液有效导热系数的探讨[J].连铸,2009(6):5-8.