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Grain-oriented electromagnetic steel sheet

An electromagnetic steel plate and directional technology, applied in the direction of circuits, magnetic objects, magnetic materials, etc., can solve the problems of large crystal grains and hinder the improvement of magnetic flux density, and achieve the effect of magnetostriction and iron loss improvement

Active Publication Date: 2021-03-09
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In the case of growing secondary recrystallized grains using a temperature gradient, the grains may grow stably, but the grains may become too large
If the crystal grains become too large, the effect of increasing the magnetic flux density may be hindered by the influence of the curvature of the coil

Method used

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  • Grain-oriented electromagnetic steel sheet
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  • Grain-oriented electromagnetic steel sheet

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no. 1 Embodiment approach

[0067] In the grain-oriented electrical steel sheet according to the first embodiment of the present invention, the secondary recrystallized grains are divided into a plurality of regions by grain boundaries passing a small value of the angle φ. That is, the grain-oriented electrical steel sheet according to this embodiment has not only grain boundaries corresponding to the grain boundaries of secondary recrystallized grains with a relatively large angle difference, but also grain boundaries with small inclination angles that divide the interior of secondary recrystallized grains. Boundary (grain boundary with small value of angle φ).

[0068] Specifically, the grain-oriented electrical steel sheet of the present embodiment has the following chemical composition: Si: 2.0 to 7.0%, Nb: 0 to 0.030%, V: 0 to 0.030%, and Mo: 0 to 0.030% in mass % , Ta: 0-0.030%, W: 0-0.030%, C: 0-0.0050%, Mn: 0-1.0%, S: 0-0.0150%, Se: 0-0.0150%, Al: 0-0.0650%, N: 0-0.0050%, Cu: 0-0.40%, Bi: 0-0.01...

no. 2 Embodiment approach

[0110] Next, the grain-oriented electrical steel sheet according to the second embodiment of the present invention will be described below. In addition, in each of the embodiments described below, differences from the above-mentioned first embodiment will be mainly described, and other features will be the same as those of the above-mentioned first embodiment, and redundant descriptions will be omitted.

[0111] In the grain-oriented electrical steel sheet according to the second embodiment of the present invention, the grain diameter of the subgrains in the rolling direction is smaller than the grain diameter of the secondary recrystallized grains in the rolling direction. That is, the grain-oriented electrical steel sheet of this embodiment has subgrains and secondary recrystallized grains whose grain diameters are controlled with respect to the rolling direction.

[0112] Specifically, in the grain-oriented electrical steel sheet of this embodiment, the average crystal grai...

no. 3 Embodiment approach

[0122] Next, the grain-oriented electrical steel sheet according to the third embodiment of the present invention will be described below. Hereinafter, the description will focus on differences from the above-described embodiment, and redundant description will be omitted.

[0123] In the grain-oriented electrical steel sheet according to the third embodiment of the present invention, the grain diameter of the subgrains in the direction perpendicular to rolling is smaller than the grain diameter of the secondary recrystallized grains in the direction perpendicular to rolling. That is, the grain-oriented electrical steel sheet of the present embodiment has subgrains and secondary recrystallized grains whose grain sizes are controlled in the direction perpendicular to rolling.

[0124] Specifically, in the grain-oriented electrical steel sheet of this embodiment, the average crystal grain size in the rolling direction C obtained based on the boundary condition BA is defined as t...

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Abstract

This grain-oriented electromagnetic steel sheet has a Goss-oriented texture. When boundary condition BA is defined as [(alpha2-alpha1)2+(beta2-beta1)2+(gamma2-gamma1)2]1 / 2 >=0.5 degrees and boundary condition BB is defined as [(alpha2-alpha1)2+(alpha2-alpha1)2+(gamma2-gamma1)2]1 / 2 >= 2.0 degrees, with (alpha1 beta1 gamma1) and (alpha2 beta2 gamma2) representing deviation angles of the crystal orientation as measured at two points adjacent on the sheet surface and spaced apart by 1 mm, a grain boundary satisfying boundary condition BA but not satisfying boundary condition BB is present.

Description

technical field [0001] The present invention relates to a grain-oriented electrical steel sheet. [0002] This application is based on Japanese Patent Application No. 2018-143898 filed in Japan on July 31, 2018, Japanese Patent Application No. 2018-143900 filed in Japan on July 31, 2018, and Japanese Patent Application No. 2018 filed in Japan on July 31, 2018. -No. 143901, Japanese Patent Application No. 2018-143902 filed in Japan on July 31, 2018, Japanese Patent Application No. 2018-143904 filed in Japan on July 31, 2018, and Japanese Patent Petition No. 2018-143904 filed in Japan on July 31, 2018 No. 2018-143905 claims priority, and its content is cited here. Background technique [0003] A grain-oriented electrical steel sheet is a steel sheet containing 7% by mass or less of Si and having a secondary recrystallized texture concentrated in {110}<001> orientation (Goss (Goss) orientation). The {110}<001> orientation means that the {110} plane of the crystal ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/00C22C38/60H01F1/147C21D8/12C21D9/46
CPCC22C38/00C21D9/46C22C38/60C21D2201/05C21D8/1205C21D8/1222C21D8/1261C21D8/1233C21D8/1255C21D8/1283C21D1/76C21D8/1272C23C28/04H01F1/14783C22C38/02C22C38/16C22C38/12C22C38/002C22C38/001C22C38/004C21D3/04C22C38/04C22C38/42H01F1/147C21D8/12H01F1/16H01F1/18
Inventor 中村修一川村悠祐森本翔太
Owner NIPPON STEEL CORP
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