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Method for manufacturing grain-oriented electrical steel sheet

A technology of electromagnetic steel sheet and manufacturing method, which is applied to manufacturing tools, circuits, magnetic objects, etc., can solve the problems that the surface of the insulating film parent steel plate is not easy to adhere to, and cannot obtain adhesion, and achieves magnetic properties and film adhesion. excellent effect

Pending Publication Date: 2021-08-24
NIPPON STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, in the manufacturing methods of Patent Document 1 and Patent Document 2, when the insulating coating is formed in contact with the surface of the base steel plate (directly on the surface of the base steel plate), there is a problem that the insulating coating is not easily adhered to the surface of the base steel plate ( insufficient adhesion)

Method used

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  • Method for manufacturing grain-oriented electrical steel sheet
  • Method for manufacturing grain-oriented electrical steel sheet
  • Method for manufacturing grain-oriented electrical steel sheet

Examples

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Embodiment 1

[0215] Next, examples of the present invention will be described, but the conditions in the examples are examples of conditions employed to confirm the practicability and effects of the present invention, and the present invention is not limited to this example of conditions. The present invention can employ various conditions as long as the object of the present invention is achieved without departing from the gist of the present invention.

[0216] Among steel slabs having chemical compositions shown in Table 1, No.A13 and No.a11 were heated to 1350° C. and subjected to hot rolling to obtain hot-rolled steel sheets with a thickness of 2.6 mm. This hot-rolled steel sheet was cold-rolled once or cold-rolled multiple times with intermediate annealing to obtain a cold-rolled steel sheet with a final thickness of 0.22 mm. The cold-rolled steel sheet having a thickness of 0.22 mm was decarburized annealed under the conditions shown in Tables 2 to 4 as a decarburized annealing step...

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Abstract

This method of manufacturing a grain-oriented electrical steel sheet involves controlling the degree of oxidation (PH2O / PH2) in a decarburization annealing step, controlling the volume ratio of hydrogen in a mixed gas atmosphere to 50% or greater in a final annealing step, washing using a solution to which an inhibitor has been added in an annealing separator removal step, controlling a mixed gas and the temperature and annealing in a smoothing step, and controlling the baking temperature and the heat treatment temperature in an insulating coating film formation step.

Description

technical field [0001] The present invention relates to a method for producing a grain-oriented electrical steel sheet. [0002] This application claims priority based on Japanese Patent Application No. 2019-005133 for which it applied in Japan on January 16, 2019, and uses the content here. Background technique [0003] Grain-oriented electrical steel sheets are mainly used in transformers. A transformer is continuously excited for a long period of time from installation to disposal, and energy loss continues to occur. Therefore, energy loss when AC is magnetized, that is, iron loss, is the main index for determining the performance of a transformer. [0004] In order to reduce the iron loss of a grain-oriented electrical steel sheet, many methods have been proposed so far. For example, regarding the structure of a steel sheet, it is a method of increasing the degree of concentration on the {110}<001> orientation called Goss orientation, and regarding a steel sheet,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D8/12C21D9/46C22C38/00C22C38/60C23C22/00H01F1/147
CPCC21D9/46C22C38/60C21D2201/05C21D6/008C21D8/1255C21D8/1283C21D8/1277C21D1/76C21D10/00C21D8/1233C22C38/02C22C38/04C21D3/04C22C38/06C22C38/001C22C38/16C22C38/14C22C38/002C22C38/12C22C38/008C22C38/08C22C38/24C23G1/081C23C22/33C23C22/08C23C22/74H01F1/14783H01F1/18Y02P10/20C22C38/34C22C38/42C22C38/54C22C38/46C22C38/48C22C38/44C22C38/50C21D8/1222C23F17/00C23C22/07C23F11/142C23F11/141C23F11/161C23C8/26C23G1/08C21D8/1288C21D8/0205C21D8/0226C21D8/0236
Inventor 高谷真介牛神义行
Owner NIPPON STEEL CORP
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