Nkk Corporation

Nobuyuki Ishida

Toshio Ishii

Munehiro Ishioka

Seishi Hatakeyama

Teruhisa Kuwana

Kentaro Akashi

Toshihiko Ooi

Kenji Araki

Kazuo Kunioka

Yoichi Miyakawa

Akira Hiraya

Shinichi Tomonaga

Hitoshi Oishi

Motoi Uesugi

Kozo Hadada

Ryuji Nagayama

Keishi Yamashita

Syu-ji Nomura

Kazumi Jiromaru

Yasunori Ohsaki

Hideyuki Suzuki

Takayuki Fukui

Masaaki Yamashita

Junichi Inagaki

Yuichi Fukushima

Takafumi Yamaji

Keiji Yoshida

Norio Inoue

Yasuhiro Majima

Yuichiro Tanaka

Shinji Hori

An apparatus for galvanizing which comprises a plating tank, a dross removing tank, a means to transfer the molten metal bath from the plating tank to the dross removing tank, and an opening located on the plating tank to recycle the molten metal bath from the dross removing tank to the plating tank.

Apparatus for hot dip galvanizing

The method for manufacturing coated steel sheet has the steps of: immersing a steel sheet in a hot-dip coating bath to form an Al&mdash;Zn base coating layer containing 20 to 95 mass % Al on the steel sheet, forming a passivated layer on the coating layer; and applying thermal history to the coating layer. The thermal history is applied immediately after the steel sheet left the hot-dip coating bath or in a temperature range of from T(&deg; C.) between 130&deg; C. and 300&deg; C. to 100&deg; C.

Coated steel sheet and method for manufacturing the same

The method for hot dip galvanizing comprises the steps of: dividing a plating vessel holding a molten metal into a plating tank and a dross removing tank; conducting hot dip galvanizing to a steel strip by immersing thereof in the molten metal bath; then transferring the molten metal bath from the plating tank to the dross removing tank; removing a dross from the molten metal bath in the dross removing tank; and recycling the molten metal bath from the dross removing tank to the plating tank through an opening located on the plating tank. The apparatus for galvanizing comprises a plating tank, a dross removing tank, a means to transfer the molten metal bath from the plating tank to the dross removing tank, and an opening located on the plating tank to recycle the molten metal bath from the dross removing tank to the plating tank.

Method for hot-dip galvanizing

An apparatus for hot-dip coating a steel strip, comprising: (a) an annealing furnace for continuously annealing the steel strip, the annealing furnace having an entrance side and an exit side; (b) a coating pot having a molten metal coating bath for coating the annealed steel strip; (c) a snout through which the annealed steel strip is introduced into the molten metal coating bath, one end of the snout being connected to the annealing furnace and the other end being immersed into the molten metal coating bath; (d) a seal device for sealing between the annealing furnace and the snout, the seal device being disposed at the exit side of the annealing furnace; and (e) a discharge device for discharging a gas containing a metal vapor from the snout to outside of the snout, the metal vapor being evaporated from the molten metal coating bath in the snout.

Apparatus for hot-dip coating a steel strip

A method for hot-dip coating a steel strip comprises: (a) continuously annealing the steel strip in an annealing furnace; (b) introducing the annealed steel strip into a molten metal coating bath through a snout; (c) dipping the annealed steel strip into the molten metal coating bath; (d) controlling a pressure inside of the snout; and (e) discharging a gas containing a metal vapor from the snout to outside of the snout. An apparatus comprises an annealing furnace, a coating pot, a control device for controlling a pressure inside the snout and a gas discharging device.

Continuous hot-dip coating method and apparatus therefor

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Yokohama, Japan

Nobuyuki Ishida