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.:
Date of Patent:
Jul. 02, 2019
Filed:
Sep. 29, 2015
Applicant:
Jfe Steel Corporation, Tokyo, JP;
Inventor:
Takayuki Fukunaga, Kurashiki, JP;
Assignee:
JFE STEEL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C21D 9/56 (2006.01); C04B 37/00 (2006.01); C21D 9/573 (2006.01); C04B 35/584 (2006.01); B32B 18/00 (2006.01); F27D 3/02 (2006.01); C21D 9/46 (2006.01);
U.S. Cl.
CPC ...
C21D 9/563 (2013.01); B32B 18/00 (2013.01); C04B 35/584 (2013.01); C04B 37/001 (2013.01); C21D 9/56 (2013.01); C21D 9/5737 (2013.01); F27D 3/026 (2013.01); C04B 2235/3873 (2013.01); C04B 2235/96 (2013.01); C04B 2235/9607 (2013.01); C04B 2235/9676 (2013.01); C04B 2237/343 (2013.01); C04B 2237/348 (2013.01); C04B 2237/365 (2013.01); C04B 2237/368 (2013.01); C04B 2237/704 (2013.01); C04B 2237/84 (2013.01); C21D 9/46 (2013.01);
Abstract
Provided is a hearth roll for supporting and conveying a steel sheet in a continuous annealing furnace, wherein all of a shaft portion and a roil main body are made from one or more ceramic materials, preferably constituted with concentric ceramic layers of different ceramic materials centering on the rotation shaft of the roll. The hearth roll has not only an excellent pickup resistance but also a long roll life free from maintenance for long periods. Also provided is a continuous annealing facility using the hearth roll in at least one of a heating zone, a soaking zone and a cooling zone.