grain-oriented electrical 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 improving magnetostriction

Active Publication Date: 2022-07-15
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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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Experimental program
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Effect test

no. 1 Embodiment approach

[0062] 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 with slightly different off-angles γ. That is, the grain-oriented electrical steel sheet of the present embodiment has not only grain boundaries with relatively large angle differences corresponding to the grain boundaries of the secondary recrystallized grains, but also grains with small inclination angles locally dividing the secondary recrystallized grains. boundary.

[0063] 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%, Mo: 0 to 0.030% in mass % , Ta: 0 to 0.030%, W: 0 to 0.030%, C: 0 to 0.0050%, Mn: 0 to 1.0%, S: 0 to 0.0150%, Se: 0 to 0.0150%, Al: 0 to 0.0650%, N: 0 to 0.0050%, Cu: 0 to 0.40%, Bi: 0 to 0.010%, B: 0 to 0.080%, P: 0 to 0.50%, Ti: 0 to 0.0150%, Sn:...

no. 2 Embodiment approach

[0105] Next, the grain-oriented electrical steel sheet according to the second embodiment of the present invention will be described below. In addition, in each embodiment described below, it demonstrates centering on the difference from the said 1st Embodiment, about other characteristics, it is set as the same thing as the said 1st Embodiment, and a repeated description is abbreviate|omitted.

[0106] In the grain-oriented electrical steel sheet according to the second embodiment of the present invention, the grain size of the γ grains in the rolling direction is smaller than the grain size of the secondary recrystallized grains in the rolling direction. That is, the grain-oriented electrical steel sheet of the present embodiment has γ grains and secondary recrystallized grains whose grain sizes are controlled with respect to the rolling direction.

[0107] Specifically, in the grain-oriented electrical steel sheet of the present embodiment, the average grain size in the rol...

no. 3 Embodiment approach

[0119] Next, the grain-oriented electrical steel sheet according to the third embodiment of the present invention will be described below. Hereinafter, the differences from the above-described embodiments will be mainly described, and overlapping descriptions will be omitted.

[0120] In the grain-oriented electrical steel sheet according to the third embodiment of the present invention, the grain size of the γ crystal grains in the direction perpendicular to the rolling direction is smaller than the grain size of the secondary recrystallized grains in the direction perpendicular to the rolling direction. That is, the grain-oriented electrical steel sheet of the present embodiment has γ grains and secondary recrystallized grains whose grain sizes are controlled in the direction perpendicular to the rolling direction.

[0121] Specifically, in the grain-oriented electrical steel sheet of the present embodiment, the average grain size in the direction C at right angles to the ro...

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Abstract

A grain-oriented electrical steel sheet having a texture oriented in a Gaussian orientation, and the deviation angle of the crystal orientation measured at two measurement points adjacent to the sheet surface and at an interval of 1 mm is expressed as (α 1 beta 1 γ 1 ) and (α 2 beta 2 γ 2 ), the boundary condition BA is defined as |γ 2 ‑γ 1 |≥0.5°, the boundary condition BB is defined as [(α 2 ‑α 1 ) 2 +(β 2 ‑β 1 ) 2 +(γ 2 ‑γ 1 ) 2 ] 1 / 2 When ≥2.0°, there are grain boundaries that satisfy the boundary condition BA and do not satisfy the boundary condition BB.

Description

technical field [0001] The present invention relates to grain-oriented electrical steel sheets. [0002] This application is based on Japanese Patent Application No. 2018-143542 filed in Japan on July 31, 2018, Japanese Patent Application No. 2018-143896 filed in Japan on July 31, 2018, and Japanese Patent Application No. 2018 filed in Japan on July 31, 2018 -143899 to claim priority, the content of which is cited here. Background technique [0003] The grain-oriented electrical steel sheet contains 7 mass % or less of Si, and has a secondary recrystallized texture concentrated in the {110}<001> orientation (Goss orientation). In addition, the {110}<001> orientation means that the {110} plane of the crystal is arranged parallel to the rolling plane, and the <001> axis of the crystal is arranged parallel to the rolling direction. [0004] The magnetic properties of grain-oriented electrical steel sheets are greatly influenced by the concentration of the {1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/00C22C38/60H01F1/147C21D8/12C21D9/46
CPCC22C38/00C21D9/46C22C38/60C21D2201/05C21D8/1222C21D8/1233C21D8/1261C21D8/1272C21D8/1255C21D8/1283C21D6/008C21D1/26C22C38/001H01F1/18H01F1/14783C21D8/1216H01F1/147C22C38/02C21D8/12H01F1/16C21D8/1244C22C38/004C22C38/46C22C38/48C22C38/50
Inventor 中村修一川村悠祐
Owner NIPPON STEEL CORP
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