...These vacuum degassing processes do not have a heating device for the ladle, but the ASEA-SKF process, developed in 1964, is characterized by the fact that it uses both electromagnetic induction stirring (agitation) and arc heating of the molten steel in the ladle, making it possible to raise the temperature of the molten steel. This was followed in 1967 by the VAD process, which stirs the molten steel with argon gas, and in 1971 by the LF process, which transferred part of the refining function of the electric furnace to the ladle, and this meant that sulfur was removed in the ladle along with oxygen. The above methods are primarily intended for the extrafurnace refining of carbon steel and low-alloy steel, but the AOD and VOD processes, etc., streamline the refining of stainless steel, selectively removing carbon while suppressing the loss of chromium due to oxidation. ... *Some of the terminology used in reference to the "LF method" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…これらの真空脱ガス法は取鍋の加熱装置をもっていないが,64年に開発されたASEA‐SKF法は,取鍋内溶鋼に電磁誘導かくはん(攪拌)とアーク加熱を併用させ,溶鋼の温度を上昇できるようにした点に特徴がある。ついで67年にはアルゴンガスで溶鋼をかくはんさせるVAD法,71年には電気炉の精錬機能の一部を取鍋に移行した形式のLF法などが開発され,酸素とともに硫黄の除去が取鍋で行われるようになった。以上の方法はおもに炭素鋼および低合金鋼の炉外精錬を目的としているが,ステンレス鋼の精錬を合理化したものがAOD法,VOD法などであり,クロムの酸化による損失を抑制しながら,炭素を選択的に除去している。… ※「LF 法」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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