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:
Mar. 22, 2005
Filed:
Oct. 17, 2002
Yasunobu Nagataki, Fukuyama, JP;
Fusato Kitano, Fukuyama, JP;
Kentaro Sato, Fukuyama, JP;
Masahiro Iwabuchi, Fukuyama, JP;
Akira Gamou, Fukuyama, JP;
Yasunobu Nagataki, Fukuyama, JP;
Fusato Kitano, Fukuyama, JP;
Kentaro Sato, Fukuyama, JP;
Masahiro Iwabuchi, Fukuyama, JP;
Akira Gamou, Fukuyama, JP;
NKK Corporation, Tokyo, JP;
Abstract
The invention relates to a high strength hot-dip galvanized steel sheet consisting essentially of 0.03 to 0.25% C, 0.7% or less Si, 1.4 to 3.5% Mn, 0.05% or less P, 0.01% or less S, 0.05 to 1% Cr, 0.005 to 0.1% Nb, by mass, and balance of Fe, and being made of a composite structure of ferrite and secondary phase, and having an average grain size of the composite structure of 10 μm or smaller. Since the high strength hot-dip galvanized steel sheet of the present invention hardly induces softening at HAZ during welding, it is applicable to structural members of automobiles for 'Tailor Welded Blanks' (TWB).