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:
Feb. 01, 2011
Filed:
Nov. 06, 2008
Nobuyuki Nakamura, Hiroshima, JP;
Takeshi Fujita, Chiba, JP;
Yoshiro Tsuchiya, Hiroshima, JP;
Shunji Ilzuka, Hiroshima, JP;
Saiji Matsuoka, Hiroshima, JP;
Nobuyuki Nakamura, Hiroshima, JP;
Takeshi Fujita, Chiba, JP;
Yoshiro Tsuchiya, Hiroshima, JP;
Shunji Ilzuka, Hiroshima, JP;
Saiji Matsuoka, Hiroshima, JP;
JFE Steel Corporation, , JP;
Abstract
A method for manufacturing a high carbon hot-rolled steel sheet. The method including the steps of hot-rolling, primary cooling, secondary cooling, coiling, acid-washing and annealing. The primary cooling step is to cool the hot-rolled steel sheet down to a cooling termination temperature of 450° C. to 600° C. at a cooling rate of higher than 120° C./sec. The secondary cooling step is to apply a secondary cooling to hold the primarily cooled hot-rolled steel sheet at a temperature of 450° C. to 650° C. until coiling.