複合素材を用いたスリットレス鋳型の開発

概要

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Recently, the electromagnetic casting (EMC) of steel is actively developed by many researchers. This process is known to improve the surface defects of the slab by imposing AC magnetic field to the meniscus during continuous casting. For this EMC process, the slit-divided mold such as the cold crucible is used usually to permeate the magnetic field. However, the rigidity of this mold is low and the magnetic field is not uniform. Therefore, the purpose of this research is to develop a new mold which allows a better penetration of the magnetic field without slits. Then, we applied the composite materials mold as substitution of slit-less mold. It has layers of copper matrix and high electric resistance alloy. As a result of the magnetic field measurement with this slit-less mold, good permeability of magnetic field was confirmed in the mold. Moreover, in the casting examination of molten steel, there was no fatal problem like the presence of mold cracks and deformation.
電気製鋼研究会の論文