Non-oriented electrical steel sheet
AssigneeNippon Steel Corporation
InventorsMinako FUKUCHI, Yoshiaki NATORI, Tesshu MURAKAWA
Life of this patent
Estimating the term…
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}<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/μm2˜50 pieces/μm2.
Claims2
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/μm2˜50 pieces/μm2
- (
- 2
- ×
- [
- Mn
- ]
- +
- 2.5
- ×
- [
- Ni
- ]
- +
- [
- Cu
- ]
- )
- -
- (
- [
- Si
- ]
- +
- 2
- ×
- [
- sol
- .
- Al
- ]
- +
- 4
- ×
- [
- P
- ]
- )
- ≥
- 1.5
- %
- .
- (
- 1
- )
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/μm2˜50 pieces/μm2,
- (
- 2
- ×
- [
- Mn
- ]
- +
- 2.5
- ×
- [
- Ni
- ]
- +
- [
- Cu
- ]
- )
- -
- (
- [
- Si
- ]
- +
- 2
- ×
- [
- sol
- .
- Al
- ]
- +
- 4
- ×
- [
- P
- ]
- )
- ≥
- 1.5
- %
- .
- (
- 1
- )
Dependencies are inferred from the claim text.