NON-ORIENTED ELECTRICAL STEEL SHEET

• US 20190316239A1
• Filed: 01/16/2018
• Published: 10/17/2019
• Est. Priority Date: 01/16/2017
• Status: Active Grant

• Current Assignee: Nippon Steel Corporation
• Original Assignee: Nippon Steel Corporation
• Inventors: YASHIKI, Hiroyoshi, NATORI, Yoshiaki, TAKEDA, Kazutoshi, MUKAWA, Susumu, MATSUMOTO, Takuya, FUJITA, Koji, MOROHOSHI, Takashi, MIYAZAKI, Masafumi
• Granted Patent: US 11,053,574 B2
• Time in Patent Office: Days
• CPC Class Codes: C21D 6/005 containing Mn
• CPC Class Codes: C21D 6/008 containing Si
• CPC Class Codes: C21D 8/12 during manufacturing of articles with special electromagnetic properties
• CPC Class Codes: C21D 8/1222 Hot rolling
• CPC Class Codes: C21D 8/1233 Cold rolling
• CPC Class Codes: C21D 8/1261 following hot rolling
• CPC Class Codes: C21D 9/46 for sheet metals
• CPC Class Codes: C22C 2202/02 Magnetic
• CPC Class Codes: C22C 38/00 Ferrous alloys, e.g. steel alloys cast-iron alloys C22C37/00
• CPC Class Codes: C22C 38/001 containing N
• CPC Class Codes: C22C 38/002 containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60
• CPC Class Codes: C22C 38/005 containing rare earths, i.e. Sc, Y, Lanthanides
• CPC Class Codes: C22C 38/008 containing tin
• CPC Class Codes: C22C 38/02 containing silicon
• CPC Class Codes: C22C 38/04 containing manganese
• CPC Class Codes: C22C 38/06 containing aluminium
• CPC Class Codes: C22C 38/14 containing titanium or zirconium
• CPC Class Codes: C22C 38/60 containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
• CPC Class Codes: H01F 1/14775 in the form of sheets
• CPC Class Codes: H01F 1/16 in the form of sheets H01F1/147 takes precedence

Abstract

A non-oriented electrical steel sheet according to an aspect of the present invention contains, as a chemical composition, by mass %, C: more than 0% and 0.0050% or less, Si: 3.0% to 4.0%, Mn: 1.2% to 3.3%, P: more than 0% and less than 0.030%, S: more than 0% and 0.0050% or less, sol. Al: more than 0% and 0.0040% or less, N: more than 0% and 0.0040% or less, one or more of La, Ce, Pr, and Nd: 0.0005% to 0.0200% in total, Ca: 0.0005% to 0.0100%, Ti: 0.0005% to 0.0100%, Sn: 0% to 0.10%, Sb: 0% to 0.10%, Mg: 0% to 0.0100%, and a remainder including Fe and impurities, in which Si−0.5×Mn: 2.0% or more, and Si+0.5×Mn: 3.8% or more.

Claims

1. A non-oriented electrical steel sheet comprising, as a chemical composition, by mass %,

C:

more than 0% and 0.0050% or less;

Si;

3.0% to 4.0%;

Mn;

1.2% to 3.3%;

P;

more than 0% and less than 0.030%;

S;

more than 0% and 0.0050% or less;

sol. Al;

more than 0% and 0.0040% or less;

N;

more than 0% and 0.0040% or less;

one or more of La, Ce, Pr, and Nd;

0.0005% to 0.0200% in total;

Ca;

0.0005% to 0.0100%;

Ti;

0.0005% to 0.0100%;

Sn;

0% to 0.10%;

Sb;

0% to 0.10%;

Mg;

0% to 0.0100%; and

a remainder including Fe and impurities, wherein

Si−

0.5×

Mn;

2.0% or more, and

Si+0.5×

Mn;

3.8% or more.

2. The non-oriented electrical steel sheet according to claim 1, comprising, as the chemical composition, one or two selected from the group consisting of:

Sn;

0.005% to 0.10%; and

Sb;

0.005% to 0.10%.

3. The non-oriented electrical steel sheet according to claim 1 comprising, as the chemical composition:

Mg;

0.0005% to 0.0100%.

4. The non-oriented electrical steel sheet according to claim 2 comprising, as the chemical composition:

Mg;

0.0005% to 0.0100%.