EP 4259834 A1 20231018 - METHOD FOR FABRICATING A SUBSTANTIALLY EQUIATOMIC FECO-ALLOY COLD-ROLLED STRIP OR SHEET, SUBSTANTIALLY EQUIATOMIC FECO-ALLOY COLD-ROLLED STRIP OR SHEET, AND MAGNETIC PART CUT FROM SAME
Title (en)
METHOD FOR FABRICATING A SUBSTANTIALLY EQUIATOMIC FECO-ALLOY COLD-ROLLED STRIP OR SHEET, SUBSTANTIALLY EQUIATOMIC FECO-ALLOY COLD-ROLLED STRIP OR SHEET, AND MAGNETIC PART CUT FROM SAME
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES IM WESENTLICHEN GLEICHATOMIGEN KALTGEWALZTEN BANDES ODER BLECHES AUS FECO-LEGIERUNG, UND DARAUS GESCHNITTENES MAGNETISCHES TEIL
Title (fr)
PROCÉDÉE DE FABRICATION D'UNE BANDE OU TÔLE LAMINÉE A FROID EN ALLIAGE FECO SENSIBLEMENT EQUIATOMIQUE, UNE BANDE OU TÔLE LAMINÉE A FROID EN ALLIAGE FECO SENSIBLEMENT EQUIATOMIQUE, ET PIÈCE MAGNÉTIQUE DECOUPEE A PARTIR DE CELLE-CI
Publication
Application
Priority
IB 2020061694 W 20201209
Abstract (en)
[origin: WO2022123297A1] The invention relates to a substantially equiatomic FeCo-alloy cold-rolled strip or sheet, and to a magnetic part cut from same, as well as to a method for fabricating a FeCo-alloy cold-rolled strip or sheet. A fully recrystallised hot-rolled sheet or strip is prepared, with a thickness of 1.5 - 2.5 mm and the following composition: 47.0% ≤ Co ≤ 51.0%; traces ≤ V + W ≤ 3.0%; traces ≤ Ta + Zr ≤ 0.5%; traces ≤ Nb ≤ 0.5%; traces ≤ B ≤ 0.05%; traces ≤ Si ≤ 3.0%; traces ≤ Cr ≤ 3.0%; traces ≤ Ni ≤ 5.0%; traces ≤ Mn ≤ 2.0%; traces ≤ O ≤ 0.03%; traces ≤ N ≤ 0.03%; traces ≤ S≤ 0.005%; traces ≤ P≤ 0.015; traces ≤ Mo ≤ 0.3%; traces ≤ Cu ≤ 0.5%; traces ≤ Al ≤ 0.01%; traces ≤ Ti ≤ 0.01%; traces ≤ Ca + Mg ≤ 0.05%; traces ≤ rare earths ≤ 500 ppm; the remainder being iron and impurities. A first cold-rolling step is carried out with a reduction rate of 70 to 90%, to bring the strip or sheet to a thickness ≤ 1 mm. Intermediate annealing is carried out when running, leading to a partial recrystallisation of the strip or sheet, running at a speed (V), and where its temperature, in the useful zone of the furnace of useful length (Lu), is between Trc and 900°C, the strip or sheet remaining therein for 15 s to 5 min at a temperature (T) such that 26°C.min ≤ (T – Trc).Lu/V ≤ 160°C.min. The strip or sheet is cooled at least at 600°C/hour. A second step of cold-rolling the annealed strip or sheet is carried out, with a reduction rate of 60 to 80%, to bring the strip or sheet to a thickness of 0.05 to 0.25 mm. And final annealing (Rf) of the cold-rolled strip or sheet is carried out to achieve complete recrystallisation followed by cooling at 100 to 500°C/hour. Magnetic part, such as a magnetic core, obtained from a strip or sheet manufactured by this method.
IPC 8 full level
C21D 1/26 (2006.01); C21D 1/28 (2006.01); C21D 1/76 (2006.01); C21D 1/84 (2006.01); C21D 6/00 (2006.01); C21D 8/12 (2006.01); C22C 19/07 (2006.01); C22C 30/00 (2006.01); C22C 38/00 (2006.01); C22C 38/04 (2006.01); C22C 38/10 (2006.01); C22C 38/18 (2006.01); C22C 38/22 (2006.01); C22C 38/30 (2006.01); C22C 38/44 (2006.01); C22C 38/52 (2006.01); H01F 1/18 (2006.01); H01F 41/02 (2006.01)
CPC (source: EP KR US)
C21D 1/26 (2013.01 - EP); C21D 1/28 (2013.01 - EP KR); C21D 1/76 (2013.01 - EP KR); C21D 1/84 (2013.01 - EP KR); C21D 6/007 (2013.01 - EP KR); C21D 8/1222 (2013.01 - KR); C21D 8/1266 (2013.01 - EP KR); C21D 8/1272 (2013.01 - EP KR); C22C 19/07 (2013.01 - KR); C22C 30/00 (2013.01 - KR); C22C 30/02 (2013.01 - US); C22C 38/001 (2013.01 - KR); C22C 38/002 (2013.01 - KR); C22C 38/10 (2013.01 - EP KR); C22C 38/44 (2013.01 - KR); C22C 38/52 (2013.01 - KR); C22C 38/58 (2013.01 - KR); C22F 1/002 (2013.01 - US); C22F 1/02 (2013.01 - US); C22F 1/16 (2013.01 - US); H01F 1/16 (2013.01 - EP KR US); H01F 41/0233 (2013.01 - EP KR); C21D 8/1222 (2013.01 - EP); C21D 2201/05 (2013.01 - EP KR); C22C 19/07 (2013.01 - EP); C22C 30/00 (2013.01 - EP); C22C 38/002 (2013.01 - EP); C22C 38/04 (2013.01 - EP); C22C 38/18 (2013.01 - EP); C22C 38/22 (2013.01 - EP); C22C 38/30 (2013.01 - EP); C22C 38/44 (2013.01 - EP); C22C 38/52 (2013.01 - EP); C22C 2202/02 (2013.01 - US); Y02P 10/25 (2015.11 - EP KR)
Citation (search report)
See references of WO 2022123297A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
Designated validation state (EPC)
KH MA MD TN
DOCDB simple family (publication)
WO 2022123297 A1 20220616; CA 3200783 A1 20220616; CN 116783313 A 20230919; EP 4259834 A1 20231018; JP 2024503576 A 20240126; KR 20230118634 A 20230811; MX 2023006853 A 20230622; US 2024035139 A1 20240201
DOCDB simple family (application)
IB 2020061694 W 20201209; CA 3200783 A 20201209; CN 202080107861 A 20201209; EP 20824681 A 20201209; JP 2023535033 A 20201209; KR 20237023161 A 20201209; MX 2023006853 A 20201209; US 202018265623 A 20201209