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. 19, 2010
Filed:
Apr. 05, 2006
Applicants:
Hisamoto Wakabayashi, Kitakyushu, JP;
Yasumitu Kondo, Futtsu, JP;
Tooru Akashi, Futtsu, JP;
Inventors:
Assignees:
Nippon Steel Corporation, Tokyo, JP;
Nippon Steel Engineering Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 1/26 (2006.01); C21D 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The oxide film thickness of the steel material surface (d+d) is made to become 15 nm or less where post-treatment after water-cooling is not needed by suitably setting the conditions of the water-cooling start temperature (T), water-cooling end temperature (T), steel material thickness (d), concentration of solute oxygen in the cooling water (D), and cooling rate (C) in the equation of d+d=7.98×10(T−T)dD+{5.50×10(T−T)−6.51(T−T)}/C.