EP 3093857 A4 20170830 - METHOD FOR PRODUCING MAGNETS USING POWDER METALLURGY

Title (en)

METHOD FOR PRODUCING MAGNETS USING POWDER METALLURGY

Title (de)

VERFAHREN ZUR HERSTELLUNG VON MAGNETEN MIT PULVERMETALLURGIE

Title (fr)

PROCÉDÉ POUR LA FABRICATION PULVIMÉTALLURGIQUE D'AIMANTS

Publication

EP 3093857 A4 20170830 (EN)

Application

EP 14876586 A 20141229

Priority

ES 201400015 A 20131230
ES 2014000223 W 20141229

Abstract (en)

[origin: EP3093857A1] The invention relates to a novel method for producing magnets (especially applicable to the production of magnets containing rare earths). The novelty of the method lies in its use of a type of electrical consolidation (such as so-called electrical resistance sintering, ERS, or so-called electrical discharge consolidation, EDC, but not necessarily one of the these) as a substitute for the conventional cold pressing and sintering method which is usually used. The method according to the invention achieves: (1) combining the compacting/sintering steps, significantly cutting the duration thereof and reducing the magnitude of the working pressures; (2) implementing the steps of magnetic aligning, pressing/sintering, heat treatment and magnetising in the same matrix; and (3) rendering superfluous the use of protective atmospheres during the sintering process.

IPC 8 full level

B22F 3/14 (2006.01); C22C 1/04 (2006.01); C22C 19/00 (2006.01); C22C 33/02 (2006.01); C22C 38/00 (2006.01); H01F 41/02 (2006.01)

CPC (source: EP)

B22F 3/105 (2013.01); C22C 19/007 (2013.01); C22C 19/03 (2013.01); C22C 19/07 (2013.01); C22C 28/00 (2013.01); C22C 38/00 (2013.01); H01F 41/0273 (2013.01); B22F 3/14 (2013.01); B22F 2003/1051 (2013.01); B22F 2998/10 (2013.01); B22F 2999/00 (2013.01); C22C 9/00 (2013.01); C22C 33/02 (2013.01); C22C 2200/02 (2013.01)

Citation (search report)

[A] US 5382303 A 19950117 - ANDERSON RICHARD L [US], et al
[IA] US 2012181476 A1 20120719 - OZEKI IZUMI [JP], et al
[A] US 2013266473 A1 20131010 - WANG YUCONG [US]
[A] WO 2012159096 A2 20121122 - UNIV CALIFORNIA [US], et al
See references of WO 2015101682A1

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

DOCDB simple family (publication)

EP 3093857 A1 20161116; EP 3093857 A4 20170830; ES 2543652 A1 20150820; ES 2543652 B1 20160301; WO 2015101682 A1 20150709

DOCDB simple family (application)

EP 14876586 A 20141229; ES 201400015 A 20131230; ES 2014000223 W 20141229