薄い偏平鋳片からの一方向性珪素鋼板の試作工程における MnS 粒子の性状

概要

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In an attempt to produce grain oriented silicon steel sheets without conventional high temperature slab reheating and hot rolling processes, series of experiments were carried out using two types of cast slabs of 5mm and 40mm thick. Relationship between the magnetic properties and the morphology of MnS was investigated for various processing conditions. In the cast slab of 40mm thick, the changes in magnetic properties were examined after processing without reheating to an exceedingly high temperature for solution of MnS. In the cast slab of 5mm thick, good magnetic properties were obtained without slab reheating or hot rolling. This is due to the fine MnS particles distributed uniformly in the matrix by rapid cooling in the solidification process. In the conventional casting, coarse MnS particles and segregation bands are formed due to the slow cooling rate in the solidification process which necessitates a high temperature slab reheating to dissolve these particles.
社団法人日本鉄鋼協会の論文
1980-07-01