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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 10072318 B1

PDFFull Text
Date of Patent:
Sep. 11, 2018

Filed:

Sep. 02, 2013

Rapid heating apparatus of continuous annealing line

Applicant:

Jfe Steel Corporation, Tokyo, JP;

Inventors:

Takayuki Fukunaga, Kurasiki, JP;

Isao Akagi, Kurashiki, JP;

Assignee:

JFE STEEL CORPORATION, Tokyo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Scott R Kastler

Int. Cl.
CPC ...
C21D 9/60 (2006.01); C21D 9/46 (2006.01); C21D 1/42 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/60 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C21D 8/12 (2006.01); C21D 1/26 (2006.01); C21D 9/00 (2006.01); H01F 1/16 (2006.01);
U.S. Cl.
CPC ...
C21D 9/60 (2013.01); C21D 1/26 (2013.01); C21D 1/42 (2013.01); C21D 8/12 (2013.01); C21D 8/1244 (2013.01); C21D 9/0006 (2013.01); C21D 9/46 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/008 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/60 (2013.01); H01F 1/16 (2013.01); Y02P 10/253 (2015.11);
Abstract

In a continuous annealing line for steel sheets comprising a heating zone, a soaking zone and a cooling zone, two or more induction heating devices are arranged in series in a front half part of the heating zone, and a heating stop region of 1˜30 m in length or a slow heating region having a heating rate of more than 0° C./s but not more than 10° C./s is provided in a temperature zone that the temperature of the steel sheet between two or more induction heating devices is 250° C. to 600° C. Even if the steel sheet is rapidly heated at a heating rate of not less than 50° C./s with such a rapid heating apparatus of the heating zone, the temperature distribution in the steel sheet is uniformized to realize the quality improvement of steel sheet shape or magnetic properties and so on.

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