摘要
中冶京诚工程技术有限公司(以下简称中冶京诚)致力于国产化大方坯连铸机的自主设计和自主创新,长期以来对于提升铸坯质量的关键技术的研发取得了突破性的进展。介绍了中冶京诚自主设计6机6流合金钢大方坯连铸机的核心技术与关键装备,系统描述了保证铸坯质量的关键技术的设计特点,重点阐述了电磁搅拌及轻、重压下技术在改善铸坯内部质量方面的应用情况,详细介绍了连铸机生产典型高碳磨球钢实际的冶金效果,指出了大方坯连铸技术的发展趋势。生产实践表明,恒定拉速下,确定合理的末端搅拌安装位置和轻、重压下技术实施区间,优化搅拌及压下工艺参数,可以显著降低高碳钢大方坯中心偏析及“V”型偏析,改善中心疏松,消除中心缩孔。连铸生产310mm×360mm断面典型钢种BU(w(C)=1%),稳定拉速约0.5m/min,铸坯试样沿厚度方向碳偏析指数为0.93~1.08,沿纵剖中线方向碳偏析指数为0.95~1.09,中心疏松不低于行业1级标准(YB/T4002—2013)。
Capital Engineering and Research Incorporation Limited devotes itself to the independent design and independent innovation of the localization bloom caster.For a long time,breakthroughs have been made in the research of key technologies for improving the quality of bloom.The core technology and the key equipment of the 6-strand bloom caster which independently designed by Capital Engineering and Research Incorporation Limited Company were introduced.The design features of key technologies to ensure the quality of the bloom were systematically described.The application of the electromagnetic stirring,the soft reduction and the hard reduction in the improvement of the inner quality of the bloom were expatiated respectively.The practical metallurgical effect of the typical high carbon grinding ball steel was introduced in detail,and the development trend of continuous casting technologies for the bloom production was pointed out.Production practices showed that: at a given speed,ensuring the reasonable position of the final stirring,the reasonable soft reduction and the reasonable hard reduction,the optimized stirring and reduction process parameters could significantly reduce the center segregation and "V" segregation of high carbon steel,improve the center shrinkage and eliminate the center porosity.During the 310 mm×360 mm typical steel BU(w(C)=1%) casting process,at the speed of 0.5 m/min,the carbon segregation index along the thickness direction was between 0.93-1.08,and the carbon segregation index along the longitudinal direction was between 0.95-1.09.According to the industry standard (YB/T 4002-2013),the center shrinkage no less than grade 1.
作者
吴国庆
邱明罡
代宗岭
陈卫强
张温永
WU Guo-qing;QIU Ming-gang;DAI Zong-ling;CHEN Wei-qiang;ZHANG Wen-yong(Steelmaking and Continuous-casting Division, Capital Engineering and Research Incorporation Limited, Beijing 100176, China)
出处
《钢铁》
CAS
CSCD
北大核心
2018年第12期54-61,共8页
Iron and Steel
关键词
大方坯连铸
磨球钢
电磁搅拌
轻压下
重压下
bloom caster
grinding ball steel
electromagnetic stirring
soft reduction
hard reduction
