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Insulation coating composition for electrical steel sheet and electrical steel sheet with insulation coating

An electrical steel sheet and insulating coating technology, applied in inorganic insulators, metal oxides, metal material coating processes, etc., can solve the problems of dust generation, surface whitening defects, deterioration of heat resistance, etc., and achieve good efficiency.

Active Publication Date: 2022-04-26
浦项股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the characteristics of phosphate with strong absorption resistance, this method has the problem of dust generation during product processing due to whitening defects on the surface, and there is a problem that heat resistance deteriorates on the part where whitening defects occur

Method used

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  • Insulation coating composition for electrical steel sheet and electrical steel sheet with insulation coating
  • Insulation coating composition for electrical steel sheet and electrical steel sheet with insulation coating
  • Insulation coating composition for electrical steel sheet and electrical steel sheet with insulation coating

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1-1

[0220] Experimental Example 1-1: According to the characteristics of the type of silane compound

Embodiment 1-1

[0222] Prepare a slab containing silicon (Si): 3.4% by weight, aluminum (Al): 0.80% by weight, manganese (Mn): 0.17% by weight, titanium (Ti): 0.0015% by weight, tin (Sn): 0.03 % by weight, nickel (Ni): 0.01% by weight, carbon (C): 0.003% by weight, nitrogen (N): 0.0013% by weight, phosphorus (P): 0.012% by weight, sulfur (S): 0.001% by weight, balance Composed of Fe and other unavoidable impurities.

[0223] The slab was heated at 1130° C. and then cold-rolled to a thickness of 2.3 mm to produce a hot-rolled sheet.

[0224] Coil the hot-rolled sheet at 650°C, then cool it in the air, anneal the hot-rolled sheet at 1040°C for 2 minutes, then quickly cool it in water and pickle it, and then cold-roll it to a thickness of 0.35mm. Manufacture of cold rolled sheet.

[0225] The cold-rolled sheet was subjected to final annealing at 1040°C for 50 seconds in a 20% hydrogen, 80% nitrogen atmosphere with the dew point adjusted to produce an annealed steel sheet.

[0226] As an insul...

Embodiment 1-2 to 1-12

[0228] The implementation method was the same as that of Example 1-1, but the contents and types of the silane compound, metal hydroxide and metal nitride in the insulating coating composition were replaced as shown in Table 1 below to form an insulating coating.

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Abstract

An electrical steel sheet according to an embodiment of the present invention comprises an electrical steel sheet substrate and insulating coatings on one or both sides of the electrical steel sheet substrate, and the insulating coating contains a silane compound and a metal hydroxide.

Description

technical field [0001] The invention relates to an insulating coating composition for electrical steel sheets and an electrical steel sheet with insulating coatings. More specifically, the present invention relates to an insulating-coating composition for electrical steel sheets and an electrical steel sheet having an insulating coating, which are excellent in heat resistance and thermal conductivity during stress relief annealing by using a silane compound having a specific chemical structure. Background technique [0002] Insulation coatings of electrical steel sheets used in engines and transformers require not only interlayer resistance but also various characteristics such as convenience in processing and molding, stability in storage and use, and the like. In addition, since electrical steel sheets are used in various ways, various insulating coatings have been developed according to the uses. [0003] For example, when an electrical steel sheet is subjected to punchi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/00C09D7/61C09D7/40B05D7/24B05D7/14B05D3/02C21D8/12C23C22/24
CPCB05D3/02B05D7/24C21D8/12C09D4/00B05D7/14C09D7/40C23C22/24C09D7/61B05D1/28B05D3/0254B05D2202/10C08K3/22C08K5/5419C09D7/63C23C22/20C23C22/26C23C22/50C23C22/74C23C2222/10C23C2222/20C08F230/08C08F130/08H01B3/10
Inventor 权玟锡沈昊敬高炫喆金柄澈崔攇曺金正雨卢泰英
Owner 浦项股份有限公司
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