Preparation method of metal soft magnetic powder core

The invention discloses a preparation method of a metal soft magnetic powder core, which aims at solving the technical problems of high pollution, high cost and poor magnetic stability in the prior art. The method comprises the steps of raw material sieving, insulation coating, to-be-formed magnetic powder preparation, pressure forming, heat treatment and surface spraying. The method has the technical benefits that a preparation technique is simple; used equipment is simple; the insulation coating is conducted on magnetic powder with nano oxide dispersion liquid; a using effect is good; an environment is not polluted; the raw material cost is low; an organic solvent and an organic binder are not used in a preparation process; soaking and solidification treatment is not conducted; the method is low in cost and pollution-free; and the metal soft magnetic powder core prepared by the method has good magnetic stability, a higher quality factor and lower magnetic core loss.