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Electrical steel sheet with insulating coating

A technology of electromagnetic steel sheet and insulating film, which is applied in the manufacture of inductors/transformers/magnets, circuits, electrical components, etc., to achieve the effect of excellent film characteristics

Active Publication Date: 2015-10-14
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] (3) Organic coatings that cannot be annealed for stress relief for special purposes,

Method used

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  • Electrical steel sheet with insulating coating
  • Electrical steel sheet with insulating coating
  • Electrical steel sheet with insulating coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0053] (1) Raw materials

[0054] An electrical steel sheet [A230 (JIS C2552 (2000))] having a plate thickness of 0.5 mm was used as a test material.

[0055] (2) Surface treatment agent

[0056] Each component was mixed in water with the composition (mass ratio) shown in Table 1, and the surface treatment agent was obtained.

[0057] (3) Processing method

[0058] After annealing in a continuous annealing line to obtain a specified material, a surface treatment agent is applied by a roll coater after the steel plate is cooled, and dried using an oven at a maximum plate temperature of 140°C. The film adhesion on both sides is 600mg / m 2insulating film. As the conditions of the roll coater, three rolls and a full reverse system were set. In addition, drying temperature means the arrival temperature of the test board surface.

[0059] Next, the compounds used in Table 1 will be described.

[0060]

[0061] A1: Methyltrimethoxysilane

[0062] A2: Methyltriethoxysilane

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Abstract

An electrical steel sheet with an insulation coating excellent in punchability, coating adhesion property and coating film property after annealing, even without containing any chromium compound in the insulation coating. The insulation coating is formed by applying a surface-treatment agent to at least one side of the electrical steel sheet and drying the surface-treatment agent. The surface-treatment agent contains trialkoxysilane and / or dialkoxysilane (A) in which a substituent bound to Si is constituted only by at least one non-reactive substituent selected from the group consisting of hydrogen, an alkyl group, and a phenyl group; and a silane coupling agent (B), at a mass ratio (A / B) of 0.05 to 1.0.

Description

technical field [0001] The present invention relates to an electrical steel sheet with an insulating film. In particular, the present invention relates to an electrical steel sheet having an insulating coating that is excellent in punchability, coating adhesion, and coating properties after annealing even if the insulating coating does not contain a chromium compound. Background technique [0002] Insulation coatings of electrical steel sheets used for motors, transformers, etc. require not only interlayer resistance but also various properties such as coating adhesion, punchability, and weldability. Since electrical steel sheets are used in various applications, various insulating coatings have been developed according to their applications. In addition, when punching, shearing, bending, etc. are performed on the electrical steel sheet, the residual strain will degrade the magnetic properties. Therefore, in order to solve this problem, it is often carried out at a temperat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C22/00B32B15/04H01F1/18
CPCH01F41/00C09D1/00C09D5/08C09D5/4476C23C18/122C23C18/1241C23C18/127C23C22/74C23C2222/20H01F1/18Y10T428/259Y10T428/31663B32B15/04C23C22/00
Inventor 藤林亘江佐志一道奥村友辅大岛安秀洼田隆广名越正泰
Owner JFE STEEL CORP
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