Patent ID: 7964043
Filing Date: 2011-06-21
Classification: C21D,C22C,H01F

Abstract:
1. A process for the production of magnet cores comprising an iron-based soft magnetic alloy wherein at least 50% of the alloy structure is occupied by fine-crystalline particles with an average particle size of 100 nm or less, comprising: a) preparing an alloy melt; b) producing an amorphous alloy strip from the alloy melt by means of quick-hardening technology; c) winding of the amorphous strip to form unstacked amorphous magnet cores; d) heat treating of the unstacked amorphous magnet cores to form nanocrystalline magnet cores, comprising conveying each unstacked amorphous magnet core through an annealing zone in contact with a heat sink, wherein the heat sink has a high thermal capacity and a high thermal conductivity, and wherein the heat sink comprises a metal, metallic alloy, metal powder, ceramic, or ceramic powder.