Development of EMBr/EMS Multifunction Mold

9th International Symposium on Electromagnetic Processing of Materials

材料科学;物理学

Okada, Nobuhiro^1 ; Kawamoto, Masayuki^2 ; Ohga, Shintaro^3

Nippon Steel and Sumitomo Metal Corporation, R and D Laboratories, 20-1 Shintomi, Futtsu, Chiba Prefecture

293-8511, Japan^1

Nippon Steel and Sumitomo Metal Corporation, Osaka Steel Works, 1-109 Shimaya 5-chome, Konohana, Osaka Prefecture

554-0024, Japan^2

Nippon Steeland Sumitomo Metal Corporation, Kashima Works, 3 Hikari, Kashima, Ibaraki Prefecture

314-0014, Japan^3

关键词: Continuous casting mold;    Electromagnetic brakes;    Electromagnetic devices;    Electromagnetic stirring;    EMBr;    Interstitial free steel;    Medium-carbon steels;    Multifunction devices;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/424/1/012031/pdf
DOI  :  10.1088/1757-899X/424/1/012031

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

EMBr (ElectroMagnetic Brake) and in-mold EMS (ElectroMagnetic Stirring) have been developed to control molten steel flow in a continuous casting mold. EMBr is able to stabilize the molten flow in the mold. EMBr is usually used to prevent breakout during high speed casting of medium carbon steel. In-mold EMS is effectively to improve surface quality of the cast such as interstitial free steel by forced flow of the molten steel in front of initially solidifying shell. Suitable molten flow pattern in the mold is depends on its casting condition and components. However, ordinary electromagnetic device has only one function of EMBr or EMS, so a multifunction device which can be selected EMBr or EMS in the mold is desirable. It is difficult to obtain sufficient performance both EMBr and EMS in only one electromagnetic device because the necessary structure of them is different. EMBr needs to generate large magnetic flux density by large teeth of iron core. A lot of small teeth are necessary for EMS to generate travelling magnetic field along the mold side uniformly. The structure and current applied method of the EMBr/EMS multifunction mold has been developed by numerical analysis of electromagnetic field and fluid flow dynamics. The EMBr/EMS multifunction mold has been applied to Kashima No.3 CC.