造塊技術の改善と品質の向上

概要

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In recent steelmaking industry, secondary refining technologies have been prevailing to produce high quality steel.The method to decrease inclusions, segregation, pipe and surface defect which are mainly ruled by the ingot making technique have been left as eternal targets for the people who work for ingot making process.However, various improvements have been done. In this paper, the reduction method of non-metallic inclusions are mainly described as follows;(1) Technologies to avoid secondary contamination of the steel.: Atmosphere, roles of runner brick quality and teeming powder.(2) Technologies to remove non-metallic inclusions in the steel.: Hot top and solidification without ingot movement.(3) The outline of the ingot making facilities in Chita Plant, Daido Steel based on the above knowledge.
大同特殊鋼株式会社の論文