Global Patent Index - EP 0848397 B1

EP 0848397 B1 2002-09-18 - Manufacturing process of a soft magnetic iron based alloy component with nanocristalline structure

Title (en)

Manufacturing process of a soft magnetic iron based alloy component with nanocristalline structure

Title (de)

Herstellungsverfahren für eine auf Eisen basierende weichmagnetische Komponente mit nanokristalliner Struktur

Title (fr)

Procédé de fabrication d'un composant magnétique en alliage magnétique doux à base de fer ayant une structure nanocristalline

Publication

EP 0848397 B1 (FR)

Application

EP 97402667 A

Priority

FR 9615197 A

Abstract (en)

[origin: EP0848397A1] The production of a magnetic component from a nanocrystalline iron based soft magnetic alloy of composition (in at. %) ≥ 60 % Fe, 0.1-3 % Cu, 0-25 % B, 0-30 (preferably ≤ 14) % Si, 0.1-30 % one or more of Nb, W, Ta, Zr, high-frequency, Ti and Mo and balance impurities, the sum of Si + B being 5-30 %, involves producing a toroidal preform by winding an amorphous strip of the alloy around a mandrel and carrying out one or more crystallisation anneal processes at 500-600 degrees C for 0.1-10 hrs. to form nanocrystals. The novelty comprises carrying out a relaxation heat treatment at below the crystallisation start temperature prior to crystallisation annealing.

IPC 1-7 (main, further and additional classification)

H01F 41/02; H01F 1/153

IPC 8 full level (invention and additional information)

C21D 6/00 (2006.01); C21D 1/26 (2006.01); C22C 38/00 (2006.01); C22C 38/16 (2006.01); H01F 1/153 (2006.01); H01F 41/02 (2006.01)

CPC (invention and additional information)

H01F 41/0226 (2013.01); H01F 1/15333 (2013.01); H01F 1/15341 (2013.01); Y10S 977/833 (2013.01)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 0848397 A1 19980617; EP 0848397 B1 20020918; AT 224582 T 20021015; AU 4519997 A 19980618; AU 731520 B2 20010329; CN 1134034 C 20040107; CN 1185012 A 19980617; CZ 293837 B6 20040818; CZ 9703983 A3 19980715; DE 69715575 D1 20021024; DE 69715575 T2 20030522; ES 2184047 T3 20030401; FR 2756966 A1 19980612; FR 2756966 B1 19981231; HK 1010938 A1 20040604; HU 216168 B 19990428; HU 9702383 A2 19980728; HU 9702383 A3 19980828; JP H10195528 A 19980728; PL 184208 B1 20020930; PL 323663 A1 19980622; SK 161897 A3 19981202; SK 284008 B6 20040707; TR 199701599 A2 20000721; TR 199701599 A3 20000721; TW 561193 B 20031111; US 5911840 A 19990615; ZA 9710780 B 19980612