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Enhancing the Quality of Electrotechnical Steel Grade Slab Billets via Electromagnetic Stirring in the CCM Secondary Cooling Zone
Metallurgist ( IF 0.9 ) Pub Date : 2024-03-01 , DOI: 10.1007/s11015-024-01618-4
G. N. Kononyhin , D. V. Burkov , S. V. Bakhtin , A. I. Dagman , S. I. Shakhov , A. V. Kuklev , Yu.M. Rogatchikov

Electromagnetic stirring (EMS) of the liquid phase of billets is one of the most technologically advanced methods to enhance the macrostructure quality of continuously cast slabs produced on high-performance continuous casting machines (CCMs). Under the influence of EMS, a forced movement of the melt is created relative to the crystallization front. The temperature gradient across the cross-section of the slab and the chemical composition of the steel are stabilized via heat and mass transfers.

A project was implemented at Novolipetsk Iron and Steel Works to equip a slab CCM with an EMS system in the secondary cooling zone of a continuously cast ingot (CCI). This paper presents the industrial development results of the teeming electrotechnical steel technology using the EMS system. Furthermore, the key aspects of stirring and technological parameters of teeming electrotechnical steel are presented. The effect of EMS on the quality of a CCI is confirmed in terms of crystallization structure variations with an increase in the zone of equiaxed crystals by more than twice in comparison with the typical teeming practice. Furthermore, it has been established that using EMS can effectively influence liquid steel and considerably enhance the quality of the CCI macrostructure and the uniformity in the properties of finished rolled products.



中文翻译:

通过连铸二冷区电磁搅拌提高电工钢级板坯质量

钢坯液相电磁搅拌(EMS)是提高高性能连铸机(CCM)生产的连铸板坯宏观结构质量的技术最先进的方法之一。在 EMS 的影响下,熔体相对于结晶前沿产生强制运动。板坯横截面的温度梯度和钢的化学成分通过传热和传质得以稳定。

新利佩茨克钢铁厂实施了一个项目,在连铸锭 (CCI) 的二冷区为板坯连铸机配备 EMS 系统。本文介绍了利用EMS系统丰富的电工钢铁技术的产业发展成果。进一步介绍了电工钢浇注搅拌的关键环节和工艺参数。EMS 对 CCI 质量的影响在结晶结构变化方面得到了证实,与典型的浇铸实践相比,等轴晶体区域增加了两倍以上。此外,已经证实,使用EMS可以有效地影响钢水,并显着提高CCI宏观结构的质量和成品轧制产品性能的均匀性。

更新日期:2024-03-03
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