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Electrical steel sheet with insulating coating and manufacturing method thereof

A technology of insulating film and electromagnetic steel sheet, applied in the direction of manufacturing tools, circuits, magnetic objects, etc., can solve the problems of excessive thermal expansion coefficient difference, core peeling, large shear stress, etc., to achieve large film tension and film adhesion. excellent effect

Active Publication Date: 2022-06-07
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, it is known that a large shear stress is generated at the interface between the insulating coating and the steel plate or at the interface between the insulating tension coating layer and the forsterite coating layer due to an excessively large difference in the thermal expansion coefficient between the steel plate and the insulating coating layer. When manufacturing the core, it is easy to cause the film to peel off at the innermost winding part

Method used

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  • Electrical steel sheet with insulating coating and manufacturing method thereof
  • Electrical steel sheet with insulating coating and manufacturing method thereof
  • Electrical steel sheet with insulating coating and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] A silicon steel sheet containing Si: 3.25%, C: 0.04%, Mn: 0.08%, S: 0.002%, sol.Al: 0.015%, N: 0.006%, Cu: 0.05%, Sb: 0.01% in mass % After heating the billet at 1150°C for 20 minutes, hot rolling was performed to obtain a hot rolled sheet with a thickness of 2.4 mm, and after annealing at 1000°C for 1 minute, a final thickness of 0.27 mm was obtained by cold rolling. A sample with a size of 100 mm × 400 mm was taken from the central part of the sample, and the temperature was raised from room temperature to 820 °C at a heating rate of 80 °C / s, and the primary recrystallization annealing was performed at 820 °C for 60 seconds in a humid gas atmosphere. Next, 5 parts by mass of TiO was mixed with respect to MgO: 100 parts by mass 2 The obtained annealing separator was made into a water slurry, and then applied and dried. After raising the temperature of the steel sheet from 300°C to 800°C over 100 hours, the temperature was raised to 1200°C at 50°C / hr, and the final fin...

Embodiment 2

[0113] A silicon steel sheet containing Si: 3.25%, C: 0.04%, Mn: 0.08%, S: 0.002%, sol.Al: 0.015%, N: 0.006%, Cu: 0.05%, Sb: 0.01% in mass % After the billet was heated at 1150°C for 20 minutes, it was hot rolled to obtain a hot rolled sheet with a thickness of 2.2 mm, annealed at 1000°C for 1 minute, and then cold rolled to obtain a final thickness of 0.23 mm. The temperature was raised from room temperature to 820°C at 50°C / s, and the primary recrystallization annealing was performed at 820°C for 60 seconds in a humid gas atmosphere. Then, 150 parts by mass of Al was mixed with respect to MgO: 50 parts by mass 2 O 3 , 1 mass part of Na 2 B 4 O 7 ·10H 2 The annealing separator made of O was made into a water slurry, and then applied and dried. After raising the temperature of the steel sheet from 300°C to 800°C for 100 hours, the temperature was raised to 1200°C at 50°C / hr, and the final finish annealing was performed at 1200°C for 5 hours. 2 O 3 ·5SiO 2 ) as the mai...

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Abstract

The present invention provides an electrical steel sheet with an insulating coating excellent in film adhesion of the insulating coating and a method for producing the same. An electrical steel sheet with an insulating coating according to the present invention has an insulating coating including an insulating tension coating layer A on at least one side, wherein the weight per unit area of ​​the insulating tension coating layer A is M, and the insulation tension is The tension exerted by coating layer A on the steel plate is set to σ A , the tension applied to the steel plate by the insulating tension coating layer of the unit area weight M / 2 from the surface in the insulating tension coating layer A is 0.80×σ A above. The method for manufacturing an electrical steel sheet with an insulating coating of the present invention includes: coating at least one surface of an electrical steel sheet with a coating-forming treatment liquid, and after the coating, the temperature range of 600°C to 700°C is heating at a heating rate of 100°C / sec or higher, and then sintering at 800°C or higher to form the insulating tension coating layer A, and the coating film forming treatment liquid contains Mg, Al, and Ca selected from phosphoric acid, boric acid, and silicic acid. , at least one of Ba, Sr, Zn, Ti, Nd, Mo, Cr, Ta, Cu, Mn salts, and colloidal silica.

Description

technical field [0001] The present invention relates to an electrical steel sheet with an insulating coating and a method for producing the same. Among them, the present invention relates to an electrical steel sheet with an insulating film which is excellent in film adhesion of the insulating film and has a large film tension, and particularly relates to a oriented electrical steel sheet with an insulating film. Background technique [0002] Electromagnetic steel sheets are soft magnetic materials that have been widely used as core materials for rotating machines and stationary machines. In particular, grain-oriented electrical steel sheets, among soft magnetic materials used as core materials for transformers and generators, have a crystal structure in which the <001> orientation, which is the easy axis of magnetization of iron, is highly aligned with the rolling direction of the steel sheet. Material. Such an aggregate structure is a secondary structure in which c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/00C23C28/04H01F1/147C22C38/00C22C38/60
CPCC22C38/60C21D8/1283C21D8/1288C23C24/082C22C38/001C22C38/02C22C38/04C22C38/06C22C38/16C21D8/1222C21D8/1233C21D8/1272C21D6/008C23C14/0641C23C14/3492C23C14/345C23C14/3464C23C24/00C23C24/08C23C22/74C23G1/083C23C22/22C23C22/20C23C22/188C23C22/33H01F1/18C03C1/008C23C22/08H01F1/147C21D9/46C23C20/06C23C28/04C23C22/82C22C2202/02C23C18/1212C23C18/1241C23C18/127
Inventor 寺岛敬末宗圣启国府花梨高宫俊人
Owner JFE STEEL CORP
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