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:
Jan. 10, 2012
Filed:
Mar. 24, 2009
Mikako Takeda, Kobe, JP;
Shohei Nakakubo, Kobe, JP;
Takashi Onishi, Kobe, JP;
Masumi Nishimura, Kakogawa, JP;
Hidenori Sakai, Kakogawa, JP;
Tomotada Maruo, Kobe, JP;
Mikako Takeda, Kobe, JP;
Shohei Nakakubo, Kobe, JP;
Takashi Onishi, Kobe, JP;
Masumi Nishimura, Kakogawa, JP;
Hidenori Sakai, Kakogawa, JP;
Tomotada Maruo, Kobe, JP;
Kobe Steel, Ltd., Kobe-shi, JP;
Abstract
An FeO layer including fine crystal grains having random orientation is formed as inner layer scale on the surface of the steel wire rod containing C: 0.05-1.2 mass % (hereinafter referred to as '%'), Si: 0.01-0.50%, Mn: 0.1-1.5%, P: 0.02% or below, S: 0.02% or below, N: 0.005% or below, an FeSiOlayer with the thickness: 0.01-1.0 μm is formed in the boundary face between the FeO layer of the inner layer scale and steel, and the thickness of the inner layer scale is 1-40% of the total scale thickness. In another aspect, the maximum grain size of the crystal grain of the inner layer scale is 5.0 μm or below and the average grain size is 2.0 μm or below.