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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12571068 B1

PDFFull Text
Date of Patent:
Mar. 10, 2026

Filed:

May. 11, 2021

Continuous annealing line, continuous hot-dip galvanizing line, and steel sheet production method

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Hidekazu Minami, Tokyo, JP;

Kazuki Endoh, Tokyo, JP;

Yuki Toji, Tokyo, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

KENJA IP LAW PC

Primary Examiner:

Nicholas A Wang

Int. Cl.
CPC ...
C21D 9/56 (2006.01); C21D 1/04 (2006.01); C21D 1/26 (2006.01); C21D 3/06 (2006.01); C21D 6/00 (2006.01); C21D 9/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C23C 2/26 (2006.01); C23C 2/28 (2006.01); C23C 2/40 (2006.01);
U.S. Cl.
CPC ...
C21D 9/562 (2013.01); C21D 1/04 (2013.01); C21D 1/26 (2013.01); C21D 3/06 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 9/46 (2013.01); C21D 9/561 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C23C 2/26 (2013.01); C23C 2/28 (2013.01); C23C 2/29 (2022.08); C23C 2/40 (2013.01); C21D 2241/00 (2013.01); C22C 2202/04 (2013.01);
Abstract

Provided is a continuous annealing line capable of producing a steel sheet excellent in hydrogen embrittlement resistance. A continuous annealing linecomprises: a payoff reelconfigured to uncoil a cold-rolled coil C to feed a cold-rolled steel sheet S; an annealing furnaceconfigured to continuously anneal the cold-rolled steel sheet S and including a heating zone, a soaking zone, and a cooling zonethat are arranged from an upstream side in a sheet passing direction; a downstream lineconfigured to continuously pass the cold-rolled steel sheet S discharged from the annealing furnacetherethrough; a tension reelconfigured to coil the cold-rolled steel sheet S; and a sound wave irradiatorconfigured to irradiate the cold-rolled steel sheet S being passed from the cooling zoneto the tension reelwith sound waves.

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