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川崎製鉄の無方向性電磁鋼板の歴史と最近の進歩

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川崎製鉄技報

KAWASAKI STEEL GIHO Vol.29 (1997) No.3

川崎製鉄の無方向性電磁鋼板の歴史と最近の進歩

History and Recent Development of Non-Oriented Electrical Steel in Kawasaki Steel 本田 厚人(Atsuhito Honda) 小畑 良夫(Yoshio Obata) 岡村 進(Susumu Okamura) 要旨 : 川崎製鉄は,1954 年に無方向性冷延電磁鋼板の製造を開始して以来種々の電磁鋼板を開発 してきた。そして優れた電磁特性を有するのみならず打ち抜き性,溶接性,厳しい厚み精 度,適正な機械的性質を兼ね備えた無方向性電磁鋼板を開発し,かつそれらを大量生産す る技術,設備,システムを確立した。最近では,低鉄損の 50RM230,高透磁率の RP シ リーズ,歪取焼鈍後に低鉄損を示すRMA シリーズ等の新製品を開発した。これらの製品は, 家庭電化製品用モータなどに対する効率改善,省エネルギーの観点からの最近の厳しい要 求を満足させるものとして期待されている。 Synopsis :

Since the first production of cold rolled non-oriented electrical steel strip in 1954, Kawasaki Steel has developed various kinds of electrical steels, and has established mass production techniques, facilities and systems for producing non-oriented electrical steels having not only excellent magnetic properties but also good punchability, weldability, severe tolerance of thickness and appropriate mechanical properties. Recently, new products such as 50RM230 of the lowest iron loss, RP series of high induction, and RMA series of low iron loss, secured after SRA(stress relief annealing), were developed. These are expected to meet customers' requirements from the viewpoint of energy saving and efficiency improvement of motors for home appliances of late years.

(c)JFE Steel Corporation, 2003

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