Non-oriented electromagnetic steel sheet with low iron loss afte

Details Non-oriented electromagnetic steel sheet with low iron loss afte Non-oriented electromagnetic steel sheet with low iron loss afte

1997-09-26

1999-08-24

Sheehan, John

Metal treatment

Process of modifying or maintaining internal physical...

Magnetic materials

296021, 29609, 29596, H01F 1147

Patent

active

059420510

ABSTRACT:
In a non-oriented electromagnetic steel sheet including about 0.01 wt % or less of C, about 1.0 wt % or less of Si, Mn in a range of about 0.1 wt % to 1.5 wt %, Al in a range of about 0.2 wt % to 1.5 wt %; the steel sheet having a critical amount of about 2 to 80 ppm rare earth metal, and the quantities of Ti and Zr in the steel sheet being limited to about 15 ppm or less of Ti, and about 80 ppm or less of Zr. The sheet exhibits excellent magnetic characteristics, such as iron loss, even when punched and laminated sheets are stress relief annealed at a low temperature for a short period of time.

REFERENCES:
patent: 3960616 (1976-06-01), Evans et al.
patent: 4204890 (1980-05-01), Irie et al.
patent: 4338143 (1982-07-01), Shimoyama et al.

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