US2026092345A1PendingUtilityA1
Non-oriented electrical steel sheet
Est. expirySep 22, 2042(~16.2 yrs left)· nominal 20-yr term from priority
C22C 38/16C22C 38/14C22C 38/08C22C 38/06C22C 38/04C22C 38/004C22C 38/001C21D 9/46C21D 8/0273C21D 8/0268C21D 8/0236C21D 8/0226C21D 6/008C21D 2201/05H01F 1/14791H01F 1/14775C21D 8/12C22C 38/60C22C 38/008C22C 38/105C22C 38/10C22C 38/02C21D 8/1233C21D 8/1272Y02P10/20H01F 1/147
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Claims
Abstract
The non-oriented electrical steel sheet according to the present invention includes a composition in which α-γ transformation can occur, and the composition contains Ti: 0.0001%˜0.0050%, and when an area ratio of crystal grains in a {hkl} orientation (within a tolerance of 10°) to the entire visual field when a steel sheet surface is measured by a scanning electron microscope equipped with electron back scattering diffraction (SEM-EBSD) is represented as Ahkl-uvw, A411-011 is 15% or more, and the number density of precipitates is 0.5 pieces/μm2˜50 pieces/μm2.
Claims
exact text as granted — not AI-modified1 . A non-oriented electrical steel sheet, comprising a chemical composition containing:
in mass %, C: 0.010% or less; Si: 1.50%˜4.00%; sol. Al: 0.0001%˜1.0000%; S: 0.010% or less; N: 0.0005%˜0.0100%; Ti: 0.0010%˜0.0050%; one or more selected from the group consisting of Mn, Ni, and Cu: 2.50%˜5.00% in total; Co: 0.000%˜1.000%; Sn: 0.000%˜0.400%; Sb: 0.000%˜0.400%; and P: 0.000%˜0.400%, and satisfying (1) Expression below when the Mn content (mass %) is set to [Mn], the Ni content (mass %) is set to [Ni], the Cu content (mass %) is set to [Cu], the Si content (mass %) is set to [Si], the sol. Al content (mass %) is set to [sol. Al], and the P content (mass %) is set to [P], and having a balance consisting of Fe and impurities, wherein when an area ratio of crystal grains in a {hkl}<uvw> orientation (within a tolerance of) 10°) to the entire visual field when a steel sheet surface is measured by a scanning electron microscope equipped with electron back scattering diffraction (SEM-EBSD) is represented as Ahkl-uvw, A411-011 is 15% or more, and the number density of precipitates is 0.5 pieces/μm 2 ˜50 pieces/μm 2
(
2
×
[
Mn
]
+
2.5
×
[
Ni
]
+
[
Cu
]
)
-
(
[
Si
]
+
2
×
[
sol
.
Al
]
+
4
×
[
P
]
)
≥
1.5
%
.
(
1
)
2 . A non-oriented electrical steel sheet, comprising a chemical composition containing:
in mass %, C: 0.010% or less; Si: 1.50%˜4.00%; sol. Al: 0.0001%˜1.0000%; S: 0.010% or less; N: 0.0005%˜0.0100%; Ti: 0.0010%˜0.0050%; one or more of Mn, Ni, and Cu: 2.50%˜5.00% in total; Co: 0.000%˜1.000%; Sn: 0.000%˜0.400%; Sb: 0.000%˜0.400%; and P: 0.000%˜0.400%, and satisfying (1) Expression below when the Mn content (mass %) is set to [Mn], the Ni content (mass %) is set to [Ni], the Cu content (mass %) is set to [Cu], the Si content (mass %) is set to [Si], the sol. Al content (mass %) is set to [sol. Al], and the P content (mass %) is set to [P], and having a balance comprising Fe and impurities, wherein when an area ratio of crystal grains in a {hkl}<uvw> orientation (within a tolerance of) 10° to the entire visual field when a steel sheet surface is measured by a scanning electron microscope equipped with electron back scattering diffraction (SEM-EBSD) is represented as Ahkl-uvw, A411-011 is 15% or more, and the number density of precipitates is 0.5 pieces/μm 2 ˜50 pieces/μm 2 ,
(
2
×
[
Mn
]
+
2.5
×
[
Ni
]
+
[
Cu
]
)
-
(
[
Si
]
+
2
×
[
sol
.
Al
]
+
4
×
[
P
]
)
≥
1.5
%
.
(
1
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