البحث في مجموعات البراءات الوطنية والدولية

1. (WO2018074531) HOT-ROLLED STEEL SHEET FOR MANUFACTURING ELECTRICAL STEEL, AND METHOD FOR MANUFACTURING SAME

Pub. No.:    WO/2018/074531    International Application No.:    PCT/JP2017/037753
Publication Date: Fri Apr 27 01:59:59 CEST 2018 International Filing Date: Thu Oct 19 01:59:59 CEST 2017
IPC: C22C 38/00
B21B 45/08
C21D 8/12
C22C 38/06
C22C 38/60
Applicants: JFE STEEL CORPORATION
JFEスチール株式会社
Inventors: EHASHI Yuiko
江橋 有衣子
TAKENAKA Masanori
竹中 雅紀
IMAMURA Takeshi
今村 猛
TAKASHIMA Minoru
▲高▼島 稔
Title: HOT-ROLLED STEEL SHEET FOR MANUFACTURING ELECTRICAL STEEL, AND METHOD FOR MANUFACTURING SAME
Abstract:
A hot-rolled steel sheet for manufacturing electrical steel having a scale layer on the surface thereof, wherein the lightness L* in accordance with JIS Z 8781-4:2013 of the steel sheet surface satisfies the expression 30 ≤ L* ≤ 50 and the chromaticities a* and b* thereof satisfy the expressions -1 ≤ a* ≤ 2 and -5 ≤ b* ≤ 3, respectively, and the color difference ∆Eab * in accordance with JIS Z 8781-4:2013 in a center part and a reverse-side end part using one end part in a coil longitudinal direction as a reference furthermore satisfies the expression ∆Eab * ≤ 8, whereby a grain-oriented electrical steel sheet is obtained in which there is minimal variation of characteristics within a product coil.