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:
Oct. 20, 2015
Filed:
Dec. 13, 2011
Hideyuki Takahashi, Chiba, JP;
Nobuyuki Sato, Chiba, JP;
Kazuki Nakazato, Chiba, JP;
Masato Iri, Chiba, JP;
Hideyuki Takahashi, Chiba, JP;
Nobuyuki Sato, Chiba, JP;
Kazuki Nakazato, Chiba, JP;
Masato Iri, Chiba, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
An annealing and manufacturing method of hot-dip galvanized steel strips includes suppression of oxide formation of elements in the steel strips. An annealing furnace includes a heating zone, a soaking zone, and a cooling zone in which a portion of gas is introduced to decrease the gas dew point. A gas suction rate Qoin a portion of the cooling zone, a gas suction rate Qoin an upper portion and a gas feed rate Qiin a lower portion of the soaking zone, a gas feed rate Qiin a connection part between the soaking and cooling zones, an atmosphere gas supply rate Qfinto the cooling zone and its subsequent zone, an atmosphere gas supply rate Qfinto the soaking zone, an internal volume Vs of the soaking zone, and an average furnace temperature Ts of the soaking zone satisfy relationships including 0.3×Qf<Qo