US 2026/0110070 A1Published application

Non-oriented electrical steel sheet, core, and rotary electric machine

AssigneeNippon Steel Corporation

InventorsMinako FUKUCHI, Yoshiaki NATORI

Life of this patent

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Abstract

The non-oriented electrical steel sheet includes, as a chemical composition, in terms of mass %, 0.0100% or less of C, 1.50 to 4.00% of Si, 0.0001 to 1.00% of sol.Al, 0.0100% or less of S, 0.0100% or less of N, and 2.50 to 5.00% in total of one or more selected from the group consisting of Mn, Ni, and Cu, wherein, in terms of mass %, when [Mn] is defined as the Mn content, [Ni] is defined as the Ni content, [Cu] is defined as the Cu content, [Si] is defined as the Si content, [sol.Al] is defined as the sol.Al content, and [P] is defined as the P content, (2×[Mn]+2.5×[Ni]+[Cu])−([Si]+2×[sol.Al]+4×[P])≥1.50% is satisfied; has A411-011 of 15.0% or more; has a B50D of 1.70 T or more; and has a W10D/400D of 10.4 W/kg or less.

Claims4

Dependent claims

A non-oriented electrical steel sheet including, as a chemical composition,

in terms of mass %,
0.01
%
⁢
or
⁢
less
⁢
of
⁢
C
,
1.5
to
4.
%
⁢
of
⁢
Si
,
0.0001
to
1.
%
⁢
of
⁢
sol
.
Al
,
0.01
%
⁢
or
⁢
less
⁢
of
⁢
S
,
0.01
%
⁢
or
⁢
less
⁢
of
⁢
N
,
2.50 to 5.00% in total of one or more selected from the group consisting of Mn, Ni, and Cu,
0.
to
1.
%
⁢
of
⁢
Co
,
0.
to
0.4
%
⁢
of
⁢
Sn
,
0.
to
0.4
%
⁢
of
⁢
Sb
,
0.
to
0.4
%
⁢
of
⁢
P
,
0.0000 to 0.0100% in total of one or more selected from the group consisting of Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn, and Cd, wherein
in terms of mass %, when [Mn] is defined as a Mn content, [Ni] is defined as a Ni content, [Cu] is defined as a Cu content, [Si] is defined as a Si content, [sol.Al] is defined as a sol.Al content, and [P] is defined as a P content, a formula (1) below is satisfied, and
a balance of Fe and impurities;
the non-oriented electrical steel sheet having an area fraction A411-011 of 15.0% or more, wherein Ahkl-uvw is defined as an area fraction of grains having a {hkl}<uvw> orientation with respect to an entire visual field when a plane that is parallel to a rolled surface and has a depth of ½ of a sheet thickness from a surface is measured by SEM-EBSD;
the non-oriented electrical steel sheet having a magnetic flux density B50D of 1.70 T or more, wherein the B50D is an average of a magnetic flux density in a 45 degree direction with respect to a rolling direction and a magnetic flux density in a 135 degree direction with respect to the rolling direction;
and
the non-oriented electrical steel sheet having an iron loss W10D/400D of 10.4 W/kg or less, wherein the W10D/400D is an average of an iron loss in a 45 degree direction with respect to the rolling direction and an iron loss in a 135 degree direction with respect to the rolling direction:
(
2
×
[
Mn
]
+
2.5
×
[
Ni
]
+
[
Cu
]
)
-
(
[
Si
]
+
2
×
[
sol
.
Al
]
+
4
×
[
P
]
)
≥
1.5
%
.
(
1
)

139 more elements

A rotary electric machine comprising:

a stator;
a rotor arranged on an inner peripheral side of the stator;
and a case that is in close contact with the stator from an outer peripheral side of the stator and fixes the stator, wherein
at least one of the stator and the rotor has a core constituted by a non-oriented electrical steel sheet including,
as a chemical composition,
in terms of mass %,
0.01
%
⁢
or
⁢
less
⁢
of
⁢
C
,
1.5
to
4.
%
⁢
of
⁢
Si
,
0.0001
to
1.
%
⁢
of
⁢
sol
.
Al
,
0.01
%
⁢
or
⁢
less
⁢
of
⁢
S
,
0.01
%
⁢
or
⁢
less
⁢
of
⁢
N
,
2.50 to 5.00% in total of one or more selected from the group consisting of Mn, Ni, and Cu,
0.
to
1.
%
⁢
of
⁢
Co
,
0.
to
0.4
%
⁢
of
⁢
Sn
,
0.
to
0.4
%
⁢
of
⁢
Sb
,
0.
to
0.4
%
⁢
of
⁢
P
,
0.0000 to 0.0100% in total of one or more selected from the group consisting of Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn, and Cd, wherein in terms of mass %, when [Mn] is defined as a Mn content, [Ni] is defined as a Ni content, [Cu] is defined as a Cu content, [Si] is defined as a Si content, [sol.Al] is defined as a sol.Al content, and [P] is defined as a P content, a formula (1) below is satisfied, and
a balance of Fe and impurities;
the non-oriented electrical steel sheet having an area fraction A411-011 of 15.0% or more, wherein Ahkl-uvw is defined as an area fraction of grains having a {hkl}<uvw> orientation with respect to an entire visual field when a plane that is parallel to a rolled surface and has a depth of ½ of a sheet thickness from a surface is measured by SEM-EBSD;
the non-oriented electrical steel sheet having a magnetic flux density B50D of 1.70 T or more, wherein the B50D is an average of a magnetic flux density in a 45 degree direction with respect to a rolling direction and a magnetic flux density in a 135 degree direction with respect to the rolling direction;
and
the non-oriented electrical steel sheet having an iron loss W10D/400D of 10.4 W/kg or less, wherein the W10D/400D is an average of an iron loss in a 45 degree direction with respect to the rolling direction and an iron loss in a 135 degree direction with respect to the rolling direction:
(
2
×
[
Mn
]
+
2.5
×
[
Ni
]
+
[
Cu
]
)
-
(
[
Si
]
+
2
×
[
sol
.
Al
]
+
4
×
[
P
]
)
≥
1.5
%
.
(
1
)

143 more elements

Dependencies are inferred from the claim text.

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Abstract

A non-oriented electrical steel sheet including, as a chemical composition,

in terms of mass %,
0.01
%
⁢
or
⁢
less
⁢
of
⁢
C
,
1.5
to
4.
%
⁢
of
⁢
Si
,
0.0001
to
1.
%
⁢
of
⁢
sol
.
Al
,
0.01
%
⁢
or
⁢
less
⁢
of
⁢
S
,
0.01
%
⁢
or
⁢
less
⁢
of
⁢
N
,
2.50 to 5.00% in total of one or more selected from the group consisting of Mn, Ni, and Cu,
0.
to
1.
%
⁢
of
⁢
Co
,
0.
to
0.4
%
⁢
of
⁢
Sn
,
0.
to
0.4
%
⁢
of
⁢
Sb
,
0.
to
0.4
%
⁢
of
⁢
P
,
0.0000 to 0.0100% in total of one or more selected from the group consisting of Mg, Ca, Sr, Ba, Ce, La, Nd, Pr, Zn, and Cd, wherein
in terms of mass %, when [Mn] is defined as a Mn content, [Ni] is defined as a Ni content, [Cu] is defined as a Cu content, [Si] is defined as a Si content, [sol.Al] is defined as a sol.Al content, and [P] is defined as a P content, a formula (1) below is satisfied, and
a balance of Fe and impurities;
the non-oriented electrical steel sheet having an area fraction A411-011 of 15.0% or more, wherein Ahkl-uvw is defined as an area fraction of grains having a {hkl}<uvw> orientation with respect to an entire visual field when a plane that is parallel to a rolled surface and has a depth of ½ of a sheet thickness from a surface is measured by SEM-EBSD;
the non-oriented electrical steel sheet having a magnetic flux density B50D of 1.70 T or more, wherein the B50D is an average of a magnetic flux density in a 45 degree direction with respect to a rolling direction and a magnetic flux density in a 135 degree direction with respect to the rolling direction;
and
the non-oriented electrical steel sheet having an iron loss W10D/400D of 10.4 W/kg or less, wherein the W10D/400D is an average of an iron loss in a 45 degree direction with respect to the rolling direction and an iron loss in a 135 degree direction with respect to the rolling direction:
(
2
×
[
Mn
]
+
2.5
×
[
Ni
]
+
[
Cu
]
)
-
(
[
Si
]
+
2
×
[
sol
.
Al
]
+
4
×
[
P
]
)
≥
1.5
%
.
(
1
)

139 more elements