Hot-band annealing equipment, hot-band annealing method and descaling method for Si-containing hot rolled steel sheet

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United States of America Patent

PATENT NO 11788165
SERIAL NO

17506076

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Abstract

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Provided is a hot-band annealing method comprising subjecting a Si-containing hot rolled steel sheet, having an oxidized scale formed on a surface of the steel sheet by hot rolling, to hot-band annealing with a hot-band annealing equipment provided with a heating zone, a soaking zone, a cooling zone, and a rapid heating device at an upstream side of the heating zone and/or in an inlet side of the heating zone, wherein the hot rolled steel sheet is heated by not lower than 50° C. at a heating rate of not less than 15° C./s by using the rapid heating device to improve a descaling property. Also, provided is a descaling method characterized by subjecting the Si-containing hot rolled steel sheet, after the hot-band annealing, to descaling only by pickling without requiring mechanical descaling or heating the steel sheet in the pickling process.

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Patent Owner(s)

Patent OwnerAddress
JFE STEEL CORPORATIONTOKYO 100-0011

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Harada, Yoshimitsu Tokyo, JP 7 5
Matsubara, Yukihiro Tokyo, JP 28 38
Takatsu, Takahiro Tokyo, JP 3 6
Tamura, Yuta Tokyo, JP 8 13
Yamada, Goki Tokyo, JP 6 6

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