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Grain-oriented electrical steel sheet and manufacturing method thereof

A technology of electromagnetic steel sheet and manufacturing method, which is applied in the manufacture of inductors/transformers/magnets, manufacturing tools, circuits, etc., can solve the problems such as the balance of manufacturing cost, and achieve the effect of excellent iron loss characteristics and low iron loss characteristics

Active Publication Date: 2016-02-03
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, there are limitations in the control of crystal orientation and the reduction of impurities in terms of balance with manufacturing costs, etc.

Method used

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  • Grain-oriented electrical steel sheet and manufacturing method thereof
  • Grain-oriented electrical steel sheet and manufacturing method thereof
  • Grain-oriented electrical steel sheet and manufacturing method thereof

Examples

Experimental program
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Embodiment 1

[0108] Steel slabs having the composition shown in Table 2 were produced by continuous casting, heated to 1400° C., and then hot-rolled to form hot-rolled sheets with a thickness of 2.2 mm. Then, the hot-rolled sheets were annealed at 1020° C. for 180 seconds. Next, it is made into an intermediate plate thickness of 0.55 mm by cold rolling, and in the atmosphere oxidation degree P (H 2 O) / P(H 2 )=0.25, time: 90 seconds to implement intermediate annealing. Then, after removing the secondary scale on the surface by hydrochloric acid pickling, cold rolling was performed again to obtain a cold-rolled sheet having a thickness of 0.23 mm.

[0109] [Table 2]

[0110]

[0111] The balance is Fe and unavoidable impurities

[0112] Then, a resist was applied by gravure offset printing, followed by electrolytic etching and resist stripping in an alkali solution, and a width of 150 μm was formed at an inclination angle of 10° with respect to the direction perpendicular to the rollin...

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Abstract

According to the present invention, the thickness of the steel sheet is 0.30 mm or less, the distance between the linear grooves in the rolling direction is in the range of 2 to 10 mm, the depth of the linear grooves is 10 μm or more, and the forsterite coating at the bottom of the linear grooves is Eddy current loss when a steel sheet with a thickness of 0.3 μm or more, the total tension imparted by the forsterite coating and the tension coating is 10.0 MPa or more in the rolling direction and an alternating magnetic field of 1.7 T and 50 Hz is applied along the rolling direction The proportion of the iron loss W17 / 50 is 65% or less, so that the iron loss of the raw material on which the linear grooves for magnetic domain refinement are formed can be further reduced, and it can be assembled into an actual transformer. Grain-oriented electrical steel sheet with low iron loss characteristics.

Description

technical field [0001] The present invention relates to a grain-oriented electrical steel sheet used as a core material of a transformer or the like, and a method for manufacturing the same. Background technique [0002] Grain-oriented electrical steel sheets are mainly used as iron cores of transformers, and require excellent magnetization characteristics, especially low iron loss. [0003] Therefore, it is important to highly align the secondary recrystallized grains in the steel sheet with the (110)[001] orientation (so-called Goss orientation) and to reduce impurities in the finished steel sheet. In addition, there are limitations in the control of crystal orientation and the reduction of impurities in terms of balance with production costs and the like. Therefore, a technique for reducing iron loss by introducing non-uniformity into the surface of the steel sheet by physical means, that is, a magnetic domain refinement technique, is being developed. [0004] For examp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/00C21D8/12H01F1/16H01F1/18C22C38/04C22C38/60
CPCC22C38/001C22C38/002C22C38/02C22C38/04C22C38/06C22C38/08C22C38/60C23C30/00H01F1/18C23C26/00C21D8/1216C21D9/46Y10T428/2457Y10T428/24612H01F41/00
Inventor 井上博贵大村健山口广冈部诚司
Owner JFE STEEL CORP
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