スラブ型 40t ESR における精錬効果と品質について(<特集>鋼の特殊精錬)

概要

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Our experience and study on the refining and solidification in a 40t slab ESR process at Yawata Works and the properties of the rolled heavy plates are reported in this paper. Inclusions in the ESR ingot are quite small and few. Desulphurization to gaseous phase plays an important role in the total desulphurization of ESR. The deoxidation is discussed form the viewpoint of Al-O equilibrium. In order to obtain hydrogen contents lower than 1 ppm, the control of atmosphere and the use of recycled slag are necessary. The secondary mist cooling practice has been developed for the prevention of ghost lines in large ESR ingots. Heavy plates rolled from the ESR ingot show excellent ductility and impact properties to convetional materials. A high reliability in material properties is secured by the application of ESR process.
社団法人日本鉄鋼協会の論文
1977-11-01