| 摘要 |
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 DEG C., a saturation magnetization value of at least about 174 emu/g at 25 DEG C., a core loss not greater than about 0.3 W/kg, measured at 25 DEG C., 60 Hz and 1.4 T after having been annealed at 360 DEG C. for about 2000 seconds, a core loss not greater than about 0.3 W/kg, measured at 25 DEG C., 60 Hz and 1.4 T after having been annealed at about 380 DEG 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 DEG C., 60 Hz and 1.4 T after having been annealed at 360 DEG C. for about 2000 seconds, an exciting power requirement not greater than about 1 VA/kg, measured at 25 DEG C., 60 Hz and 1.4 T after having been annealed at 380 DEG C. for about 1000 seconds, a fracture strain of at least about 0.03, measured at 25 DEG C. for the alloy after having been annealed at about 360 DEG C. for about 1.5 hours, and a fracture strain of at least about 0.03, measured at 25 DEG C. for the alloy after having been annealed at about 380 DEG 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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