Non-oriented magnetic steel sheet with excellent high frequency iron loss characteristics
An electromagnetic steel plate, non-directional technology, applied in the direction of circuits, magnetic materials, electrical components, etc., can solve the problems of reduced rolling, difficult operation, reduced productivity, etc., and achieve the effect of good high-frequency iron loss characteristics
Active Publication Date: 2015-11-18
JFE STEEL CORP
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the method of reducing the thickness of the plate has the following problems: due to the decrease in the rigidity of the material, not only the operation becomes difficult, but also the man-hours for punching and stacking increase, so the productivity decreases
However, since Si is an element with high solid-solution strengthening ability, as the amount of Si added increases, there is a problem that the material solidifies and the rollability decreases.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0061] The molten steel obtained by blowing in a converter was degassed, and the steel having the composition shown in Table 1 was smelted, followed by continuous casting to make a slab, and after heating the slab at 1100°C×1hr, the Hot rolling was carried out at a hot rolling finish temperature of 800° C., and coiled at a temperature of 610° C. to obtain a hot-rolled sheet having a thickness of 1.8 mm. Next, at 100vol% N 2 After the hot-rolled sheet is annealed at 1000°C × 30sec in the environment, it is cold-rolled to make a cold-rolled sheet with a thickness of 0.35 mm. 2 -80vol%N 2 Under ambient conditions, final annealing was performed at 980° C. for 15 sec to produce cold-rolled annealed sheets.
[0062] From the cold-rolled annealed sheet thus obtained, an Epstein test piece having a width of 30 mm x a length of 280 mm was cut out along the rolling direction and a direction perpendicular to the rolling, and the iron loss W was measured in accordance with JISC2550. 10...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
A non-oriented magnetic steel sheet having either a composition which contains, in mass%, at most 0.005% of C, 1.5 to 4% of Si, 1.0 to 5% of Mn, at most 0.1% of P, at most 0.005% of S, at most 3% of Al, at most 0.005% of N, and at most 0.0030% of Bi with the balance being Fe and unavoidable impurities or a composition which contains, in mass%, at most 0.005% of C, 1.5 to 4% of Si, 1.0 to 5% of Mn, at most 0.1% of P, at most 0.005% of S, at most 3% of Al, at most 0.005% of N, and at most 0.0030% of Bi, and further contains 0.0005 to 0.005% of Ca and / or 0.0002 to 0.005% of Mg. This non-oriented magnetic steel sheet stably exhibits excellent high frequency iron loss characteristics, even when the steel sheet contains a large amount of Mn.
Description
technical field [0001] The present invention relates to a non-oriented electrical steel sheet excellent in high-frequency iron loss characteristics. Background technique [0002] From the viewpoint of miniaturization and high efficiency, motors for hybrid vehicles and electric vehicles are driven in a high-frequency range of 400 to 2 kHz. In the non-oriented electrical steel sheet used as the core material of such a high-frequency motor, it is desired to have low iron loss at high frequencies. [0003] In order to reduce iron loss at high frequencies, it is effective to reduce plate thickness and increase intrinsic resistance. However, the method of reducing the plate thickness has a problem that not only the handling becomes difficult because the rigidity of the material is lowered, but also the man-hours for punching and stacking are increased, so that the productivity is lowered. On the other hand, the method of increasing the intrinsic resistance does not have the abov...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/00C22C38/06C22C38/60H01F1/16
CPCC22C38/00C21D8/1222C21D8/1233C21D8/1255C21D8/1261C21D8/1272C22C38/001C22C38/002C22C38/004C22C38/008C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C38/60H01F1/14791H01F1/16
Inventor 小关新司尾田善彦户田广朗平谷多津彦中西匡
Owner JFE STEEL CORP