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. 07, 2015
Filed:
Nov. 25, 2009
Yusuke Fushiwaki, Fukuyama, JP;
Yoshiharu Sugimoto, Chiba, JP;
Yusuke Fushiwaki, Fukuyama, JP;
Yoshiharu Sugimoto, Chiba, JP;
JFE STEEL CORPORATION, Tokyo, JP;
Abstract
A galvanized steel sheet includes a basal steel sheet (BSS) containing C: 0.01-0.15%, Si: 0.001-2.0%, Mn: 0.1-3.0%, Al: 0.001-1.0%, P: 0.005-0.060%, and S≦0.01% (% by mass), balance Fe and unavoidable impurities, with zinc plating layers on both sides of the BSS. One or more oxides selected from Fe, Si, Mn, Al, and P oxides are in steel sheet superficial portions in direct contact with the zinc plating layers and extending from each surface of the BSS to 100 μm deep. A crystalline oxide is in the regions from each surface of the BSS to 10 μm depth, which are also located in direct contact with the zinc plating layers, the crystalline oxide including Fe crystal grains within which Si and Mn atoms are distributed in the regions from grain boundaries to 1 μm deep inside the grain.