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川崎製鉄技報 KAWASAKI STEEL GIHO

Vol.17 (1985) No.3

特殊ステンレス鋼の製造

Production of High Grade Stainless Steels

小倉 滋(Shigeru Ogura) 川原田 昭(Akira Kawaharada) 松崎 実(Minoru Matsuzaki) 北岡 英就(Hidenari Kitaoka) 大坪 宏(Hiroshi Ohtsubo) 川崎 龍夫 (Tatsuo Kawasaki) 要旨 : 精錬,鋳造,熱延の全ての工程において高度な製造技術を必要とする特殊ステンレス鋼の製 造法について検討し,高品質で経済的な製造技術を確立した。まず,各鋼種の高温における 機械的性質について調査し,連続鋳造による製造上の問題点,不純物元素の影響を明らかに した。そして高合金鋼の不純物元素低減に有利な K-BOP,SS-VOD 設備での精錬技術と, 鋳片の 2 次冷却制御技術を組みあわせることによって,全ての鋼種の連続鋳造化を可能と した。さらに鋳片の熱処理,圧延技術の改善により鋳片の組織を制御する技術を開発し,現 在では,あらゆるステンレス鋼を安定製造する体制が確立している。 Synopsis :

On the basis of fundamental experiments, optimum condition in steelmaking and continuous casting for the production of high quality stainless steels have been determined. The amounts of impurity contents were decreased by adopting K-BOP and SS-VOD process and the secondary cooling conditions in continuous casting were optimized. With these countermeasures, all kinds of stainless steel have been produced by continuous casting with no problem. For the dualphase stainless steel, hot ductility was remarkably improved by heat treatment of slab soaking. Thus the system for the stable production of all high quality stainless steels has now been established.

(c)JFE Steel Corporation, 2003

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