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1. WO1980001857 - MAGNETICALLY ANISOTROPIC ALLOYS BY DEFORMATION PROCESSING

Publication Number WO/1980/001857
Publication Date 04.09.1980
International Application No. PCT/US1980/000149
International Filing Date 15.02.1980
IPC
H01F 1/08 2006.01
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
032of hard-magnetic materials
04metals or alloys
06in the form of particles, e.g. powder
08pressed, sintered, or bound together
CPC
H01F 1/08
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
FMAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
1Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
01of inorganic materials
03characterised by their coercivity
032of hard-magnetic materials
04metals or alloys
06in the form of particles, e.g. powder
08pressed, sintered, or bound together
Applicants
Inventors
Priority Data
1611528.02.1979US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) MAGNETICALLY ANISOTROPIC ALLOYS BY DEFORMATION PROCESSING
(FR) ALLIAGES A STRUCTURE MAGNETIQUE NON ISOTROPE OBTENUS PAR TRAITEMENT DE DEFORMATION
Abstract
(EN)
Magnetic alloys having an anisotropic magnetic structure produced by thermo-mechanical treatment in the absence of a magnetic field. The treatment calls for developing magnetic particles in an alloy by cooling such alloy in a controlled fashion from a first temperature at which the alloy is in a predominantly single phase state to a second temperature at which the alloy is in a multiphase state and deforming the alloy to result in cross-sectional area reduction of at least 30 percent (corresponding to elongation of magnetic particles by a factor of at least 1.7). Disclosed treatment leads to desirable magnetic properties, e.g., in Cu-Ni-Fe, Cu-Ni-Co, Fe-Al-Ni, Fe-Al-Ni-Co and Fe-Cr-Co alloys. For example, in the case of Fe-Cr-Co, alloy properties such as remanence-to-saturation squareness ratio in excess of 0.90 and maximum energy product in the range of 0.6-8.0 MGOe are achieved. Disclosed magnetic alloys are suitable for use in the manufacture of telephone ringers, relays, and electromagnetic transducers.
(FR)
Des alliages magnetiques ayant une structure magnetique non isotrope sont produits par traitement thermo-mecanique en l"absence d"un champ magnetique. Le traitement provoque le developpement de particules magnetiques d"un alliage en refroidissant cet alliage de maniere controlee a partir d"une premiere temperature ou l"alliage se trouve dans un etat essentiellement a une seule phase jusqu"a une seconde temperature ou l"alliage se trouve dans un etat a plusieurs phases et en deformant l"alliage pour obtenir une reduction de la section d"au moins 30% (correspondant a l"elongation des particules magnetiques avec un facteur d"au moins 1,7%). Ce traitement permet d"obtenir des proprietes magnetiques desirables dans des alliages tel que Cu-Ni-Fe, Cu-Ni-Co, Fe-Al-Ni, Fe-Al-Ni-Co et Fe-Cr-Co. Par exemple dans le cas de l"alliage Fe-Cr-Co, on obtient un rapport d"equerrage remanence-a-saturation superieur a 0,90 et un produit d"energie maximum de l"ordre de 0,6 a 8,0 MGOe. Les alliages magnetiques decrits se pretent a la fabrication de sonneries de telephone, de relais, et de transducteurs electromagnetiques.
Also published as
DE3014699
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