IP Library Granted Patent US 10,541,071
Granted Patent B2
US 10,541,071 · App. 15/311,609 · Granted Jan 21, 2020

Electrical steel sheet

Inventors: Hirotoshi Tada (Tokyo, JP); Satoshi Kano (Tokyo, JP); Ichiro Tanaka (Tokyo, JP); Hiroyoshi Yashiki (Tokyo, JP)
Assignee: NIPPON STEEL CORPORATION
H01F1/14716C21D8/12C22C38/001C22C38/002C22C38/008C22C38/02C22C38/04C22C38/06C22C38/42H01F1/14775H01F1/14791
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 10,541,071
App. No.
15/311,609
Granted
Jan 21, 2020
Kind
B2
Abstract

An electrical steel sheet includes: a specific chemical composition; a crystal grain diameter of 20 μm to 300 μm; and a texture satisfying Expression 1, Expression 2, and Expression 3 when the accumulation degree of the (001)[100] orientation is represented as I Cube and the accumulation degree of the (011)[100] orientation is represented as I Goss . I Goss +I Cube ≥10.5  Expression 1 I Goss /I Cube ≥0.50  Expression 2 I Cube ≥2.5  Expression 3

Claims (44)

1. An electrical steel sheet, comprising:

a chemical composition represented by, in mass %:

C: 0.010% or less;

Si; 1.30% to 3.50%;

Al: 0.0000% to 1.6000%;

Mn: 0.01% to 3.00%;

S: 0.0100% or less;

N: 0.010% or less;

P: 0.000% to 0.150%;

Sn: 0.000% to 0.150%;

Sb: 0.000% to 0.150%;

Cr: 0.000% to 1.000%;

Cu: 0.000% to 1.000%;

Ni: 0.000% to 1.000%;

Ti: 0.010% or less;

V: 0.010% or less;

Nb: 0.010% or less; and

balance comprising Fe and impurities;

a crystal grain diameter of 20 μm to 300 μM; and

a texture satisfying Expression 1, Expression 2, and Expression 3 when the accumulation degree of the (001)[100] orientation is represented as I Cube and the accumulation degree of the (011)[100] orientation is represented as I Goss ,

I Goss +I Cube ≥10.5  Expression 1

I Goss /I Cube ≥0.50  Expression 2

I Cube ≥2.5  Expression 3.

2. The electrical steel sheet according to claim 1 , wherein the texture satisfies Expression 4, Expression 5, and Expression 6,

I Goss +I Cube ≥10.7  Expression 4

I Goss /I Cube ≥0.52  Expression 5

I Cube ≥2.7  Expression 6.

3. The electrical steel sheet according to claim 2 , further comprising:

a magnetic property satisfying Expression 7 and Expression 8 when a saturation magnetic flux density is represented as Bs, a magnetic flux density in a rolling direction at being magnetized by a magnetizing force of 5000 A/m is represented as B50L, and a magnetic flux density in a direction perpendicular to the rolling direction and a sheet thickness direction at being magnetized by a magnetizing force of 5000 A/m is represented as B50C,

B 50 C/Bs≥ 0.790  Expression 7

( B 50 L−B 50 C )/ Bs≥ 0.070  Expression 8.

4. The electrical steel sheet according to claim 3 , wherein the magnetic property satisfies Expression 9,

( B 50 L−B 50 C )/ Bs≥ 0.075  Expression 9.

5. The electrical steel sheet according to claim 4 , wherein the magnetic property satisfies Expression 10,

B 50 C/Bs≤ 0.825  Expression 10.

6. The electrical steel sheet according to claim 1 , wherein in the chemical composition,

P: 0.001% to 0.150%,

Sn: 0.001% to 0.150%, or

Sb: 0.001% to 0.150%, or any combination thereof is satisfied.

7. The electrical steel sheet according to claim 6 , wherein in the chemical composition,

Cr: 0.005% to 1.000%,

Cu: 0.005% to 1.000%, or

Ni: 0.005% to 1.000%, or any combination thereof is satisfied.

8. The electrical steel sheet according to claim 1 , wherein a thickness thereof is 0.10 mm to 0.50 mm.

Assignments (2)
CHANGE OF NAME Recorded May 14, 2019
From: NIPPON STEEL & SUMITOMO METAL CORPORATION
To: NIPPON STEEL CORPORATION
Reel/Frame 049257/0828 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Nov 17, 2016
From: TADA, HIROTOSHI; KANO, SATOSHI; TANAKA, ICHIRO; YASHIKI, HIROYOSHI
To: NIPPON STEEL & SUMITOMO METAL CORPORATION
Reel/Frame 040356/0055 →