| PATENT ASSIGNEE'S COUNTRY | France |
| UPDATE | 06.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Mfg process comprising an iron-based soft alloy having nanocrystalline structure of chemical compn.: Fe (> 60%); Cu (0.1-3%); B(< 25%); Si (< 30%); & Niobium (0.1-30%); further more satisfying: B + Si = 5-30% - Providing an amorphous ribbon comprising the iron-based soft alloy - Winding the ribbon around a mandrel to form a core & pro vide a blank for said comp. - Subjecting blank to crystallization heat treat. comprising at least one annealing step at 500-600C for 0.1-10 hours so as to cause nanocrystals to form, wherein before the crystalli zation heat treat., a relaxation heat treat. is carried out at T < the T for onset of recrystallization of amorphous alloy Wherein the relaxation heat treat. is a T hold carried out for 0.1-10 hours at 250-480C |
| PATENT PHOTOCOPY | Available on request |
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