Double-oriented electrical steel sheet and manufacturing method therefor

Patent metadata

Field	Value
Publication number	US-12559807-B2
Application number	US-202017785240-A
Country	US
Kind code	B2
Filing date	Dec 17, 2020
Priority date	Dec 20, 2019
Publication date	Feb 24, 2026
Grant date	Feb 24, 2026

Abstract

In a double-oriented electrical steel sheet according to an embodiment of the present invention, the fraction of crystal grains having an orientation within 15° from {100} <001> is 50 to 75%, and the fraction of crystal grains having an orientation within 15° from {100}<380> is 50 to 75%.

First claim

The invention claimed is:

1 . A double-oriented electrical steel sheet, comprising, by wt %:
Si: 1.0% to 7.0%, Al: 0.02% or less (exclusive of 0%), Mn: 0.02 to 0.50%, C: 0.004% or less (exclusive of 0%), S: 0.0005 to 0.005%, and the balance of Fe and other inevitable impurities, wherein a fraction of a crystal grain having an orientation within 15° from {100}<001> is 50 to 75%, and a fraction of a crystal grain having an orientation within 15° from {100}<380> is 50 to 75%.

2 . The double-oriented electrical steel sheet of claim 1 , wherein:
a fraction of a crystal grain having an orientation within 10° from {100}<001 > is 20 to 50%, and a fraction of a crystal grain having an orientation within 10° from {100}<380> is 20 to 50%.

3 . The double-oriented electrical steel sheet of claim 1 , wherein:
an average grain diameter of the crystal grain is 2000 μm or more.

4 . The double-oriented electrical steel sheet of claim 1 , wherein:
a deviation of a magnetic flux density (B50) in a rolling direction (L direction) and a magnetic flux density (B50) in the rolling vertical direction (C direction) defined by the following formula 1 is 3 or less:

❘
"\[LeftBracketingBar]"

B
50
L

-

B
50
C

❘
"\[RightBracketingBar]"

MAX
⁡
(

B
50
L

,

B
50
C

)

×
100

[

Equation
⁢

1

]

(In Equation 1, B L 50 and B C 50 denote the magnetic flux densities (B50) in the rolling direction and the rolling vertical direction, respectively, and MAX B L 50 and B C 50 denote the larger value of the magnetic flux densities (B50) in the rolling direction and the rolling vertical direction).

Assignees

• Posco

Inventors

• Mun Hyunwoo
• Lee Se Il

Classifications

• C22C38/06

  containing aluminium · CPC title

• C22C38/04

  containing manganese · CPC title

• C22C38/02 Primary

  containing silicon · CPC title

• C21D2201/05

  Grain orientation · CPC title

• C21D9/46

  for sheet metals · CPC title