模铸40t钢锭凝固过程温度场研究
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- 英文论文题名：Temperature Field Research of 40 ton Ingot's Solidification Process
- 论文作者：周同军 ; 刘军占 ; 罗辉
- 英文论文作者：ZHOU Tongjun ; LIU Junzhan ; LUO Hui ; Baosteel Special Steel Co. ; Ltd
- 年：2016
- 作者机构：宝钢特钢有限公司;
- 论文关键词：模铸钢锭 ; 数值模拟 ; 凝固 ; 温度场
- 英文论文关键词：ingot casting ; large ingot ; solidification ; temperature field
- 会议召开时间：2016-05-12
- 会议录名称：2016年钢锭制造技术与管理研讨会论文集
- 语种：中文
- 分类号：TF771
- 学会代码：HEBE
- 会议名称：2016年钢锭制造技术与管理研讨会
- 会议地点：中国山东淄博
- 主办单位：河北省冶金学会、河北省冶金学会重机行业炼钢分会、中国金属学会特殊钢分会特钢冶炼学术委员会
- 学会名称：河北省冶金学会
- 页数：8
- 文件大小：4441k
- 原文格式：O
- 会议级别：全国
摘要
随着模铸钢锭锭型的不断开发以及连铸产品对模铸小规格锭型的替代与延伸,为满足产品质量提升与成本优化,大规格钢锭逐渐发展成了关键的模铸锭型。但是,在模铸生产中,随着锭型的增大,更易于产生各类质量问题,诸如:成分偏析、表面缺陷、钢锭缩孔等.使用计算机数值模拟软件可以模拟钢液凝固过程的温度场与流场变化情况,并且可预测钢锭缩孔缺陷位置。研究表明:40t钢锭的凝固过程是从外往内、由下向上顺序性凝固,不但冒口部位易于产生缩孔缺陷,而且锭身中心也存在缩孔倾向。在锭身中心的狭长液态金属区域内,此区域锥角小、上下传热不均易产生缩松缺陷,通过数值模拟可有效预测并推断缺陷存在的位置及原因。实践证明,40t锭型钢锭凝固与缩孔模拟与现场实际情况吻合,验证了40t钢锭锭型设计的有效性与科学性。
With the continuous development of ingot species in die-casting and the wide extension of continuous casting product specifications for smaller ingots,as to meet product quality improvement and cost optimization,the large ingots become more and more important in ingot casting.While as the ingots become larger,there may easily cause many metallurgical imperfections,such as segregation,surface defects,shrinkage,etc.Using computer software to simulate the solidification process of molten steel can know the temperature field and flow field,and predict the place of ingot shrinkage.And studies have show that the solidification path of 40 tons ingot is not only from outside to inside,but also from the ingot bottom to top,and the shrinkage cavity defects can not only happen on the top,but also may find in the center of the ingot that is a narrow area filled with liquid steel,as the area angle is small and the heat transfer is not the same as the top and bottom,it may easily cause shrinkage defects.The computer numerical simulation can effectively predict and infer the defect's location and reasons,it has been found that the solidfication and shrinkage simulation of 40 ton ingot is the same as practice,and it proves that the validity and scientificity of the 40 ton ingot's design.
With the continuous development of ingot species in die-casting and the wide extension of continuous casting product specifications for smaller ingots,as to meet product quality improvement and cost optimization,the large ingots become more and more important in ingot casting.While as the ingots become larger,there may easily cause many metallurgical imperfections,such as segregation,surface defects,shrinkage,etc.Using computer software to simulate the solidification process of molten steel can know the temperature field and flow field,and predict the place of ingot shrinkage.And studies have show that the solidification path of 40 tons ingot is not only from outside to inside,but also from the ingot bottom to top,and the shrinkage cavity defects can not only happen on the top,but also may find in the center of the ingot that is a narrow area filled with liquid steel,as the area angle is small and the heat transfer is not the same as the top and bottom,it may easily cause shrinkage defects.The computer numerical simulation can effectively predict and infer the defect's location and reasons,it has been found that the solidfication and shrinkage simulation of 40 ton ingot is the same as practice,and it proves that the validity and scientificity of the 40 ton ingot's design.
引文
[1]党卫东,吴晓春,阂永安,等.大型塑料模具用钢锭凝固和内部缺陷的数值模拟研究[J].上海金属,2010(3):53-57.
[2]马薇,赵建华,宋刚.冒口保温条件对大型钢锭凝固过程影响的数值模拟[J].热加工工艺,2011(21):41-43.
[3]赵静,周湛,张捷宇,等.钢锭凝固过程中温度场和流场的数值模拟研究[J].上海金属,2014(1):55-58.
[4]赵艳红,高建军,王欢.数值模拟在大钢锭制造中的应用[J].大型铸锻件,2012(2):12-16.
[5]李日,马军贤.如何有效运用铸造数值模拟软件提高铸件质量[J].铸造,2009(3):253-255.
[2]马薇,赵建华,宋刚.冒口保温条件对大型钢锭凝固过程影响的数值模拟[J].热加工工艺,2011(21):41-43.
[3]赵静,周湛,张捷宇,等.钢锭凝固过程中温度场和流场的数值模拟研究[J].上海金属,2014(1):55-58.
[4]赵艳红,高建军,王欢.数值模拟在大钢锭制造中的应用[J].大型铸锻件,2012(2):12-16.
[5]李日,马军贤.如何有效运用铸造数值模拟软件提高铸件质量[J].铸造,2009(3):253-255.