Abstract：Electroslag steel has uniform composition, sound microstructure, fine dispersion distribution of inclusions and excellent mechanical properties, electroslag remelting technology has become an important means to prepare various special steels. However, with the high-quality development of high-end equipment manufacturing industry, the requirements for the quality of special steel are getting higher and higher, the inherent characteristics of traditional electroslag remelting technology make it unable to meet the high-quality production requirements of high-end special steel. Under this background, after more than ten years of painstaking research, northeastern university has broken through the traditional inherent mode of electroslag remelting, and further investigated deep on the basis of existing achievements. It has carried out a lot of research work on the aspects of gas, inclusions, burning loss of easily oxidized elements and composition segregation in electroslag steel, and innovatively put forward "clean theory of full-parameter process stability" and "homogenization solidification theory of shallow flat molten pool under ultra-fast cooling and optimal melting rate". According to the structural characteristics of furnace type and the requirements of target products, it has overcome many key core technologies such as dynamic sealing, electrode weighing, melting rate control, oxygen concentration monitoring, high efficiency water cooling and multi-taper structure design of mold, developed fully closed controllable atmosphere electroslag remelting, extra-thick slab and extra-large electroslag remelting, and semi-continuous electroslag remelting hollow and solid ingots, and carried out extensive applications. In addition, the equipment and technology for preparing high-quality premelted slag and removing fluorine from waste gas of electroslag production were developed, which have been widely popularized and applied in special steel enterprises, and solved the "neck sticking" preparation problem of various high-end materials for major projects and high-end equipment in China. The two theories and innovations mentioned above are systematically introduced, and the principles and technical ideas of related new technologies and the application effects of typical products prepared by the new technologies are briefly introduced. Finally, the progress and future development of electroslag remelting technology are summarized and prospected.
姜周华, 董艳伍, 耿鑫, 刘福斌. 高品质特殊钢电渣重熔技术的开发和应用[J]. 钢铁, 2023, 58(9): 15-25.
JIANG Zhouhua, DONG Yanwu, GENG Xin, LIU Fubin. Development and application of electroslag remelting technology for high quality special steels[J]. Iron and Steel, 2023, 58(9): 15-25.
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2023, Vol. 58 
