Method for the production of powder composite cores and powder composite core

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United States of America Patent

PATENT NO 8216393
SERIAL NO

12308514

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Abstract

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A powder composite core is to be particularly dense and strong while being produced from soft magnetic alloys. In particular, the expansion of the heat-treated core is to be avoided. To produce this core, a strip of a soft magnetic alloy is first comminuted to form particles. The particles are mixed with a first binder having a curing temperature T1,cure and a decomposition temperature T1,decompose and a second binder having a curing temperature T2,cure and a decomposition temperature T2,decompose, wherein T1,cure2,cure≦T1,decompose2,decompose. The mix is pressed to produce a magnet core while the first binder is cured. The magnet core is then subjected to a heat treatment accompanied by the curing of the second binder at a heat treatment temperature TAnneal>T2,cure.

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Patent Owner(s)

Patent OwnerAddress
VACUUMSCHMELZE GMBH & CO KGGRUENER WEG 37 HANAU 63450

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brunner, Markus Bessenbach, DE 46 485
Reppel, Georg Werner Hammersbach, DE 7 340

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