ML08Al大方坯用保护渣的性能优化
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摘要
某钢厂生产的ML08Al大方坯主要存在表面凹坑、深振痕和卷渣等缺陷,其产生的原因主要是由于保护渣的润滑性能、粘度、熔点、熔速等不良因素造成的。基于现行保护渣理化性能检测结果,同时结合有限元计算分析模型,提出了保护渣理化性能优化思路和方向,并给出适宜的保护渣熔点、粘度、熔速及碱度。实际生产表明,保护渣优化后,铸坯表面品质得到明显改善。
There are a lot of surface defects in ML08Al bloom blank produced by a steel plant, such as surface pits, deep oscillation marks and slag entrapment, which are mainly induced by the improper characters of mould flux, like lubrication performance, viscosity, melting point, melting rate and others else. Based on the testing results of mould flux physical and chemical properties and the analysis results of finite element model, the optimization of mould flux performance was put out, and the proper melting point, viscosity, melting rate and alkalinity were given. The results show that the surface quality of the slab is improved obviously by using the optimized mould flux.
There are a lot of surface defects in ML08Al bloom blank produced by a steel plant, such as surface pits, deep oscillation marks and slag entrapment, which are mainly induced by the improper characters of mould flux, like lubrication performance, viscosity, melting point, melting rate and others else. Based on the testing results of mould flux physical and chemical properties and the analysis results of finite element model, the optimization of mould flux performance was put out, and the proper melting point, viscosity, melting rate and alkalinity were given. The results show that the surface quality of the slab is improved obviously by using the optimized mould flux.
引文
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[7]谢文新,阮小江,张国伟,等.结晶器保护渣性能对12Mn2VB钢连铸坯表面质量的影响[J].连铸,2008,2(4):24-27.
[8]余刚,袁武华,刘泽亚,等.10B21冷镦钢连铸工艺优化研究[J].铸造技术,2011,32(3):344-347.
[9]马桂华.ML40Cr表面微裂纹控制[J].连铸,2014,1(10):41-44.
[10]王杏娟,刘然,朱立光.SCM435钢凝固行为及保护渣性能研究[J].铸造技术,2013,34(6):672-674.
[11]周秀丽,陈敏,于景坤.保护渣熔点的一种测量方法[C]//2005中国钢铁年会论文集.北京,冶金工业出版社:2005:646-648.
[12]刘承军,孙丽枫,王德永,等.综合碱度对连铸保护渣黏性特征的影响[J].东北大学学报,2006,27(7):782-785.
[2]S Mazumdra,S K Ray.Solidification control in continuous casting of steel[J].Sadhana,2001(26):179-198.
[3]Hooli,Paavo.Mould Flux Film between Mould and Steel Shell-Effect on Heat Flux and Defect Formation[J].Steel Research,2003,(78):480-484.
[4]王剑.小方坯表面夹渣产生的原因及防止措施[J].炼钢,1999,15(3):23-25.
[5]张林涛,邓安元,王恩刚,等.连铸坯表面振痕的形成及影响因素[J].炼钢,2006,22(4):35-39.
[6]田华彦,张林涛,邓安元,等.连铸过程中振痕缺陷的分析及对策[J].铸造技术,2008,29(5):678-681.
[7]谢文新,阮小江,张国伟,等.结晶器保护渣性能对12Mn2VB钢连铸坯表面质量的影响[J].连铸,2008,2(4):24-27.
[8]余刚,袁武华,刘泽亚,等.10B21冷镦钢连铸工艺优化研究[J].铸造技术,2011,32(3):344-347.
[9]马桂华.ML40Cr表面微裂纹控制[J].连铸,2014,1(10):41-44.
[10]王杏娟,刘然,朱立光.SCM435钢凝固行为及保护渣性能研究[J].铸造技术,2013,34(6):672-674.
[11]周秀丽,陈敏,于景坤.保护渣熔点的一种测量方法[C]//2005中国钢铁年会论文集.北京,冶金工业出版社:2005:646-648.
[12]刘承军,孙丽枫,王德永,等.综合碱度对连铸保护渣黏性特征的影响[J].东北大学学报,2006,27(7):782-785.