Grain-oriented electrical steel sheet

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...

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

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