Grain-oriented electrical steel sheet

一种电磁钢板、方向性的技术，应用在电路、磁性物体、磁性材料等方向，能够解决阻碍磁通密度、晶粒大等问题

Active Publication Date: 2022-05-24
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] When secondary recrystallized grains are grown using a temperature gradient, the grains may become too large despite stable grain growth
If the crystal grains become too large, the effect of increasing the magnetic flux density may be hindered due to the influence of the curvature of the coil

Method used

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  • Grain-oriented electrical steel sheet
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Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0065] 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 β. 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 local small grains that divide the secondary recrystallized grains. Angled grain boundaries.

[0066] Specifically, the grain-oriented electrical steel sheet of the present embodiment has the following chemical composition: containing in mass %: Si: 2.0 to 7.0%, Nb: 0 to 0.030%, V: 0 to 0.030%, Mo: 0 to 0.030 %, 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%...

no. 2 Embodiment approach

[0108] 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, the point which is different from the said 1st Embodiment is mainly demonstrated, and about other characteristics, it is the same as that of the said 1st Embodiment, and a repeated description is abbreviate|omitted.

[0109] In the grain-oriented electrical steel sheet according to the second embodiment of the present invention, the grain size of the β 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 β grains and secondary recrystallized grains whose grain sizes in the rolling direction are controlled.

[0110] Specifically, in the grain-oriented electrical steel sheet of the present embodiment, the average grain size in the rolling d...

no. 3 Embodiment approach

[0130] 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.

[0131] In the grain-oriented electrical steel sheet according to the third embodiment of the present invention, the grain size of the β crystal grains in the vertical direction of rolling is smaller than the grain size of the secondary recrystallized grains in the vertical direction of rolling. That is, the grain-oriented electrical steel sheet of the present embodiment has β grains and secondary recrystallized grains whose grain sizes in the vertical direction of rolling are controlled.

[0132] Specifically, in the grain-oriented electrical steel sheet of the present embodiment, the average grain size in the direction C perpendicular to the rolling obtained based on the boundary condition BA is define...

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Abstract

A grain-oriented electrical steel sheet having a texture oriented towards a Goss orientation, where the deviation angle of the crystal orientation measured at two measurement points adjacent to each other at an interval of 1 mm on the sheet surface is expressed as (α 1 beta 1 gamma 1 ) and (α 2 beta 2 gamma 2 ), define the boundary condition BA as |β 2 ‑β 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. 2018-143541 filed in Japan on July 31, 2018, Japanese Patent Application No. 2018-143897 filed in Japan on July 31, 2018, and Japanese Patent Application filed in Japan on July 31, 2018 No. 2018-143903 to claim priority, the content of which is hereby incorporated. 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 o...

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
CPCC22C38/00C21D9/46C22C38/60C21D1/26C21D6/008C21D8/1222C21D8/1233C21D8/1261C21D8/1272C21D8/1283C21D2201/05C21D8/1255C21D1/76H01F1/18H01F1/14783C22C38/02C22C38/04C22C38/06C22C38/001C22C38/16C22C38/002C22C38/12C21D8/1216H01F1/147C21D8/12H01F1/16C22C38/004C22C38/44C22C38/46C22C38/48C22C38/50
Inventor 中村修一川村悠祐冈田慎吾伊藤知昭矢野慎也
Owner NIPPON STEEL CORP
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