Liquid drop casting method

Abstract

Abstract PURPOSE:To prevent the formation of a defect occuring in macro segregation, and to improve the quality of a steel ingot, by fractionized molten steel once to liquid drops, and stacking the granular drops cooled to an imperfectly solidified state in a mold. CONSTITUTION:The charging flow of molten steel 27 is fractionized to liquid drops of <=5mm. grain sizes by the liquid nitrogen or liquid argon sprayed from a nozzle 22 and is at the same time removed of heat. During dropping, the liquid drops cooled by convection and radiation heat transfer in the gaseous nitrogen or argon atmosphere maintained at a low temp. by the heat of evaporation and attain the imperfectly solidified state, wherein the surfaces are solidified and the inside are unsolidified. These liquid drops are stacked in a mold 24 to form a stacked ingot 28. Thus V segregation, inverse V segregation and segregation in the head part are eliminated at all, and the quality of the steel ingot is improved.

Inventors

• 👤 Yasuo Sugitani
• 👤 杉谷　泰夫
• 👤 Masahiro Yoshihara
• 👤 正裕 吉原
• 👤 Michio Ohashi
• 👤 大橋　通男

Bibliographic Details