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:
Nov. 10, 2015
Filed:
Apr. 20, 2011
Minoru Chida, Kakogawa, JP;
Hiroshi Irie, Kakogawa, JP;
Minoru Chida, Kakogawa, JP;
Hiroshi Irie, Kakogawa, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
A high tensile strength hot-dip galvannealed steel sheet having excellent coated-layer adhesiveness in which the hot-dip galvannealed layer does not peel off from a base steel sheet even in being subjected to working accompanied by sliding and a method for producing the same are provided. In the high tensile strength hot-dip galvannealed steel sheet, a hot-dip galvannealed layer is formed on the surface of the base steel sheet, the base steel sheet contains Si by 0.04-2.5%, and, when the surface roughness of the base steel sheet after the hot-dip galvannealed layer is removed by dissolution with an acid is measured for a plurality of locations by a laser microscope, the arithmetic mean inclination angle (RΔa) is 23.0° or more and the root mean square inclination angle (RΔq) is 29.0° or more in 60% or more of all of the locations measured.