| Q420C角钢铸坯凝固传热分析及AlN析出控制 |
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| 引用本文： | 汪成义, 崔怀周, 赵斌, 肖金福, 吴巍. Q420C角钢铸坯凝固传热分析及AlN析出控制[J]. 工程科学学报, 2017, 39(11): 1661-1668. DOI: 10.13374/j.issn2095-9389.2017.11.008 |
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| 作者姓名： | 汪成义 崔怀周 赵斌 肖金福 吴巍 |
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| 作者单位： | 1.钢铁研究总院冶金工艺研究所, 北京 100081 |
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| 基金项目： | 国家自然科学基金资助项目(51674092) |
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| 摘 要： | 为研究Q420C角钢在大矫直应变过程中的铸坯凝固传热行为以及AlN析出对铸坯和轧材质量的影响,本文通过ProCAST模拟软件和射钉试验,对不同参数条件下铸坯表面和角部温度以及坯壳厚度等进行模拟计算,并提出了凝固坯壳厚度修正公式.通过Gleeble实验得出,铸坯在1008~1364℃温度范围内时具有较好的热塑性.对AlN析出的热力学和动力学研究表明,铸坯应避开在AlN析出
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| 关 键 词： | 角钢 Q420C 大矫直应变 ProCAST模拟 AlN析出 |
| 收稿时间： | 2016-12-20 |
Analysis of billet solidification & heat transfer and AlN precipitation on Q420C angle steel |
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| WANG Cheng-yi, CUI Huai-zhou, ZHAO Bin, XIAO Jin-fu, WU Wei. Analysis of billet solidification & heat transfer and AlN precipitation on Q420C angle steel[J]. Chinese Journal of Engineering, 2017, 39(11): 1661-1668. DOI: 10.13374/j.issn2095-9389.2017.11.008 |
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| Authors: | WANG Cheng-yi CUI Huai-zhou ZHAO Bin XIAO Jin-fu WU Wei |
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| Affiliation: | 1.Metallurgical Technology Institute, Central Iron and Steel Research Institute, Beijing 100081, China |
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| Abstract: | This investigation sought to determine the effect of solidification & heat transfer behavior and AlN precipitation on the quality of a Q420C billet and rolled product during the process of high straightening strain. To accomplish this, the paper employed a ProCAST simulation and a nail-shooting experiment to calculate the surface and corner temperature of the billet and the thickness of shell, and a formula for the thickness of solidified shell was proposed. The slab has a good plasticity in the temperature range of 1008-1364℃ based on the results of the Gleeble experiment. The thermodynamics and kinetics of AlN precipitation show that the billet should be straightened avoid the "window" of AlN precipitation and before steel rolling, the billet temperature should be controlled to between 1160-1200℃, and the final rolling temperature should be above 850℃. This reduces AlN precipitation in the austenite grain boundary. After the test, the Q420C steel was successfully produced. The average qualified rate of the rolled products reached 90% and the comprehensive performance index met the needed requirements. |
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| Keywords: | angle steel Q420C large straightening strain ProCAST simulation AlN precipitation |
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