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Grain-oriented electromagnetic steel sheet and method for producing grain-oriented electromagnetic steel sheet

A technology of an electrical steel sheet and a manufacturing method, which is applied in the field of manufacturing grain-oriented electrical steel sheets and grain-oriented electrical steel sheets, can solve the problems of reduced tensile stress and high manufacturing costs, and achieve the effects of excellent film adhesion and excellent magnetic properties

Pending Publication Date: 2019-07-05
JFE STEEL CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, the production cost of CVD and PVD is high, so it is desired to make the film as thin as possible. In this case, the tensile stress applied to the steel sheet will be reduced.

Method used

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  • Grain-oriented electromagnetic steel sheet and method for producing grain-oriented electromagnetic steel sheet
  • Grain-oriented electromagnetic steel sheet and method for producing grain-oriented electromagnetic steel sheet
  • Grain-oriented electromagnetic steel sheet and method for producing grain-oriented electromagnetic steel sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 3

[0211]

[0212] A film layer A (ceramic film) and a film layer B (insulating tension film) were sequentially formed on the steel sheet as follows to obtain a grain-oriented electrical steel sheet.

[0213] "Steel Plate"

[0214] A steel ingot is used that contains, by mass %, C: 0.05%, Si: 3.2%, Mn: 0.05%, Al: 0.03%, N: 0.005%, and Se: 0.01% as components in the steel, and the remainder consists of unavoidable impurities and Fe composition.

[0215] The steel ingot was hot-rolled, hot-rolled sheet annealing was performed, and a final cold-rolled sheet with a thickness of 0.23 mm was produced by two-pass cold rolling with intermediate annealing, and the secondary sheet having a Goss orientation was made by decarburization annealing and final annealing. The recrystallized grains are developed. Thus, a steel plate with a forsterite coating was obtained.

[0216] Thereafter, the forsterite coating on the surface of the obtained steel sheet with the forsterite coating was remo...

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Abstract

Provided are: a grain-oriented electromagnetic steel sheet which exhibits excellent magnetic characteristics and excellent coating film adhesion after strain relieving annealing; and a method for producing this grain-oriented electromagnetic steel sheet. This grain-oriented electromagnetic steel sheet comprises: a steel sheet; a coating film layer A that is a ceramic coating film which is formed on the steel sheet and has an oxide content of less than 30% by mass; and a coating film layer B that is an insulating tension coating film which is arranged on the coating film layer A and contains anoxide. The binding energy of the 1s orbital of oxygen in the coating film layer B is higher than 530 eV; and the tension applied to the steel sheet by the coating film layer B per a thickness of 1.0Mum of the coating film layer B is 4.0 MPa / Mum or more.

Description

technical field [0001] The present invention relates to a grain-oriented electrical steel sheet and a method for producing a grain-oriented electrical steel sheet. Background technique [0002] Grain-oriented electrical steel sheet is a soft magnetic material that can be used as a core material for transformers or generators. A grain-oriented electrical steel sheet is characterized by having a crystal structure in which the <001> orientation, which is the axis of easy magnetization of iron, is highly aligned in the rolling direction of the steel sheet. Such a texture is formed by preferentially growing grains in the {110}<001> orientation called the so-called Goss orientation during the manufacturing process of the grain-oriented electrical steel sheet, followed by final annealing. As the magnetic properties of grain-oriented electrical steel products, high magnetic flux density and low iron loss are required. [0003] The magnetic properties of a grain-oriente...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C22/00C21D8/12C21D9/46C22C38/00C22C38/60C23C14/08C23C16/40C23C28/04
CPCC21D8/12C21D9/46C23C14/08C23C16/40C22C38/00C23C22/00C22C38/60C23C28/04C23C28/042H01F1/16C23C14/0641C23C14/0664C23C14/0676C23C16/34C23C22/06H01F1/18C21D8/1288
Inventor 马田拓实高城重宏寺岛敬
Owner JFE STEEL CORP
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