Metal treatment – Stock – Magnetic
Patent
1995-03-02
1996-03-05
Yee, Deborah
Metal treatment
Stock
Magnetic
148307, 420117, 420121, C22C 3802
Patent
active
054964180
ABSTRACT:
This invention is directed to metallic alloy consisting essentially of iron, boron and silicon and having a composition in the region A, B, C, D, E, F, A of FIG. 1, said alloy having a crystallization temperature of at least about 490.degree. C., a saturation magnetization value of at least about 174 emu/g at 25.degree. C., a core loss not greater than about 0.3 W/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at 360.degree. C. for about 2000 seconds, a core loss not greater than about 0.3 W/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at about 380.degree. C. for a time ranging from about 1000 to about 2000 seconds, an exciting power requirement not greater than about 1 VA/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at 360.degree. C. for about 2000 seconds, an exciting power requirement not greater than about 1 VA/kg, measured at 25.degree. C., 60 Hz and 1.4 T after having been annealed at 380.degree. C. for about 1000 seconds, a fracture strain of at least about 0.03, measured at 25.degree. C. for the alloy after having been annealed at about 360.degree. C. for about 1.5 hours, and a fracture strain of at least about 0.03, measured at 25.degree. C. for the alloy after having been annealed at about 380.degree. C. for about 1.5 hours. The alloys exhibit improved utility and handleability in the production of magnetic cores used in the manufacture of electric distribution and power transformers.
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Liebermann Howard H.
Ramanan V. R. V.
Allied-Signal Inc.
Buff Ernest D.
Criss Roger H.
Yee Deborah
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