# US 2019/0316239 A1 · Non-oriented electrical steel sheet

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- Number: US 2019/0316239 A1
- Document ID: US20190316239A1
- Status: Published application
- Kind: A1
- Application number: 16/470,122
- Filed: 2018-01-16
- Published: 2019-10-17
- Earliest claimed: 2017-01-16
- Assignees: Nippon Steel Corporation
- Applicants: Nippon Steel Corporation
- Inventors: Hiroyoshi YASHIKI; Yoshiaki NATORI; Kazutoshi TAKEDA; Susumu MUKAWA; Takuya MATSUMOTO; Koji FUJITA; Takashi MOROHOSHI; Masafumi MIYAZAKI
- Web page: https://patentgrep.com/patent/US20190316239A1

## CPC

- C22C 38/60: containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
- C21D 6/005: {containing Mn}
- C21D 6/008: {containing Si}
- C21D 8/1222: {Hot rolling}
- C21D 8/1233: {Cold rolling}
- C21D 8/1261: {following hot rolling}
- C21D 9/46: for sheet metals
- C22C 38/00: Ferrous alloys, e.g. steel alloys (cast-iron alloys C22C37/00)
- C22C 38/001: {containing N}
- C22C 38/002: {containing In, Mg, or other elements not provided for in one single group C22C38/001 - C22C38/60}
- C22C 38/005: {containing rare earths, i.e. Sc, Y, Lanthanides}
- C22C 38/008: {containing tin}
- C22C 38/02: containing silicon
- C22C 38/04: containing manganese
- C22C 38/06: containing aluminium
- C22C 38/14: containing titanium or zirconium
- H01F 1/14775: {in the form of sheets}
- H01F 1/16: in the form of sheets (H01F1/147 takes precedence)
- C21D 8/12: during manufacturing of articles with special electromagnetic properties
- C22C 2202/02: Magnetic
- C22C: ALLOYS (treatment of alloys C21D, C22F)
- C21D: MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING (surface treatment of metallic material involving at least one process provided for in class C23 and at least one process covered by this subclass C23F17/00; unidirectional solidification of eutectic materials or unidirectional demixing of eutectoid materials C30B)
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## 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

### Claim 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.

### Claim 2 (depends on 1)

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%.

### Claim 3 (depends on 1)

The non-oriented electrical steel sheet according to claim 1 comprising, as the chemical composition:
Mg: 0.0005% to 0.0100%.

### Claim 4 (depends on 2)

The non-oriented electrical steel sheet according to claim 2 comprising, as the chemical composition:
Mg: 0.0005% to 0.0100%.