Non-oriented magnetic steel sheet having high magnetic flux density, and motor
An electromagnetic steel sheet, orientation technology, applied in the magnetic circuit characterized by magnetic materials, the magnetic properties of inorganic materials, etc., can solve the problems of increased manufacturing cost and insufficient magnetic flux density.
Active Publication Date: 2016-03-02
JFE STEEL CORP
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Problems solved by technology
However, since this method uses a single cold rolling method at room temperature, the effect of improving the magnetic flux density cannot be sufficiently obtained
In this regard, the magnetic flux density can be improved when the above-mentioned cold rolling is performed by heating the sheet temperature to about 200°C, but there are problems such as the need for equipment for warm rolling and strict process management.
Moreover, although two or more cold rolling methods with intermediate annealing in between can be used, there is a problem that the manufacturing cost increases.
Method used
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[0087] Steels a to r having various compositions shown in Table 1 were melted and continuously cast to produce billets. At this time, in order to facilitate the comparison of iron loss, the component composition of the slab was adjusted so that the value of (Si+Al+Mn / 2) obtained from the contents (mass %) of Si, Al, and Mn was to the same extent. Next, the above-mentioned billet was reheated to a temperature of 1020-1120° C., and then hot-rolled to form a hot-rolled sheet with a thickness of 2.0 mm. The hot-rolled sheet was annealed at 1,000° C.×30 seconds by continuous annealing, and then Cold-rolled to produce a cold-rolled sheet (cold-rolled coil) with a plate thickness of 0.15 mm. In addition, samples of the size of iron loss test pieces were cut out from the above-mentioned cold-rolled coils in the rolling direction (L) and the rolling direction (C) perpendicular to the rolling direction.
[0088] Table 1
[0089]
[0090] Next, the above-mentioned cold-rolled sheet...
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Abstract
Provided are: a non-oriented magnetic steel sheet containing, by mass%, no greater than 0.010% of C, 1.0-7.0% of Si, 0.001-3.0% of Mn, 0.0001-3.5% of sol. Al, 0.01-0.2% of P, no greater than 0.010% of S, and no greater than 0.010% of N, the ratio (P120 / Fe700) of the peak-peak height (P120) of the P in the vicinity of an electron energy of 120 eV to the peak-peak height (Fe700) of the Fe in the vicinity of an electron energy of 700 V in the Auger derivative spectrum obtained by analyzing the grain boundary broken surfaces by means of Auger electron spectroscopy being at least 0.1 and the sheet thickness being 0.10-0.50 mm; and a motor using the non-oriented magnetic steel sheet in a core.
Description
technical field [0001] The present invention relates to a high-flux-density non-oriented electrical steel sheet excellent in iron loss characteristics in a high-frequency region, which is mainly used in electric vehicles, Iron core materials for drive motors and generator motors of hybrid vehicles, etc. Background technique [0002] In recent years, the practical use of hybrid vehicles and electric vehicles is rapidly developing. For the drive motors and generator motors used in these vehicles, they need to be installed in a limited space in the vehicle and reduce the weight of the vehicle. Therefore, it is desirable to have a small size. change. Therefore, in order to reduce the size of the electric motor, variable speed driving by frequency control of the drive power supply of the electric motor, and electric motors rotating at a high frequency in a high-frequency range higher than the commercial frequency are increasing. As a result, drive motors and generator motors ar...
Claims
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IPC IPC(8): C22C38/00C22C38/06C22C38/60H01F1/16C21D8/12
CPCC21D8/12C21D8/1233C21D8/1272C22C38/00C22C38/001C22C38/002C22C38/004C22C38/005C22C38/008C22C38/02C22C38/04C22C38/06C22C38/08C22C38/16C22C38/34C22C38/60H01F1/16H02K1/02
Inventor 中西匡小关新司尾田善彦户田广朗
Owner JFE STEEL CORP