磁控电渣重熔技术研究进展

Research progress of magnetic-controlled electroslag remelting technology

电渣重熔作为生产特殊钢等高端装备材料的重要环节,是一种集去除夹杂物和优化凝固组织于一体的二次精炼技术。然而,随着锭型尺寸的增加,大型特殊钢电渣锭普遍存在纯净度低、均质性差、凝固组织/碳化物粗大等共性问题。近年来,利用外加磁场对电渣精炼以及凝固过程进行调控,得到了众多研究者的广泛关注。文章主要结合课题组近些年的研究成果,围绕磁控电渣重熔多级强化去除夹杂物、磁控电渣重熔凝固组织/碳化物细化、磁控电渣重熔技术工业实践等方面,阐述了外加磁场提升电渣锭纯净度和均质性的作用机制,并提出未来的思考方向和研究重点。

Electroslag remelting,as an important link in the production of high-end equipment materials such as special steels,is a secondary refining technology that integrates the removal of inclusions and optimization of solidified microstructure.However,with the increase of ingot size,large electroslag ingots generally have common problems such as low purity,poor homogeneity and coarse solidified microstructure/carbides.In recent years,the use of applied magneticfield to regulate the refining and solidification process in electroslag remelting has received extensive attentions from many researchers.This paper mainly combines the research results of the group in recent years and focuses on the multi-stage enhancement of inclusions removal by magnetic-controlled electroslag remelting,solidified microstructure/carbide refinement by magnetic-controlled electroslag remelting,industrial practice of magnetic-controlled electroslag remelting technology,etc.The mechanism of the applied magneticfield to improve the purity and homogeneity of electroslag ingots is explained,and the future directions and research focus are also proposed.