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自動車用合金化溶融亜鉛めっき鋼板の製造設備と操業

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川崎製鉄技報

KAWASAKI STEEL GIHO Vol. 23(1991) No.4

自動車用合金化溶融亜鉛めっき鋼板の製造設備と操業

Outline of New Continuous Galvanizing Line for Automobiles

喜 安 哲 也(Tetsuya Kiyasu) 飯 田 祐 弘 (Sachihiro Iida) 重 本 晴 美 (Harumi Shigemoto) 菅沼 七三雄(Namio Suganuma) 坂本 実(Minoru Sakamoto) 岩本 周治(Shyuji Iwamoto) 要旨 : 高い防錆能力と同時に優れた加工性・表面外観が要求される自動車外板用合金化溶融亜鉛 めっき鋼板の製造を目的として,水島製鉄所に連続式溶融亜鉛めっき設備(CGL)が建 設され,1989 年5月より稼働している。本CGLは,表面外観向上のためにオールラジア ントチューブによる全間接加熱型焼鈍炉,新型ワイピング装置,ベンドフロータ等の新鋭 装置を備え,まためっき密着性向上のための長大合金化炉を有している。さらに,オンラ イン合金化度計,付着量等の機器開発により,自動品質管理を実現した。この結果,機械 的性質と成形性に優れ,かつ良好なめっき付着量分布と密着性を備えた表面外観の極めて 優れた鋼板の高水準の生産を達成している。 Synopsis :

With the aim of producting galvannealed steel sheet for the outer panels of automobiles, which was required not only for its good anticorrosion performance, but also for its excellent formability and surface appearance, a new continuous galvanizing line (CGL) was constructed at Kawasaki Steels Mizushima Works and put into operation in May 1989. The CGL has an all radiant tube annealing furnace, new-type gas wiping device and bend-floator to obtain good surface appearance, and also has a large galvannealing furnace to obtain good anti-powdering property. The CGL has succeeded in realizing automatic quality control by developing an on-line alloy sensor, coating weight sensor and so on. The CGL has achieved high-level production of the galvannealed steel sheet which has the excellent surface appearance and good coating weight distribution, anti-powdering property and excellent mechanical properties and formability.

(c)JFE Steel Corporation, 2003

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