Patent ID: 8075710
Filing Date: 2011-12-13
Classification: B22F,H01F,Y10T

Abstract:
1. A process for the manufacture of soft magnetic composite components comprising the steps of: die compacting a powder composition comprising a mixture of soft magnetic, iron or iron-based powder, core particles of which are surrounded by an electrically insulating, inorganic coating, and an organic lubricant in an amount of 0.05 to 1.5% by weight of the composition, said organic lubricant being free from metal and having a temperature of vaporisation less than the decomposition temperature of the coating; ejecting the compacted body from the die; heating the compacted body in an inert atmosphere to a temperature above the vaporisation temperature of the lubricant and below the decomposition temperature of the inorganic coating for removing the lubricant from the compacted body, and subjecting the body obtained after heating the compacted body in an inert atmosphere to heat treatment at a temperature between 300° C. and 600° C. in water vapour.