Method for preparing soft magnetic composite material through hot pressing

A method for preparing a soft magnetic composite material through hot pressing includes the following steps: dispersing particle soft magnetic powder into a dispersing medium, adding a coupling agent to conduct surface processing, conducting separation to obtain magnetic powder wrapping the coupling agent, conducting washing and drying through absolute ethyl alcohol to obtain the coupling agent modified magnetic powder, mixing the epoxy resin and an epoxy hardener to obtain an epoxy resin system mixture, mixing the coupling agent modified magnetic powder and the epoxy resin system mixture according to the proportion to obtain mixed slurry containing the magnetic powder and the epoxy resin system mixture, pouring the mixed slurry into a container, conducting vacuumizing, arranging the container into a constant temperature oven to conduct procuring to obtain composite slurry obtained through procuring, transferring the procured composite slurry into a mould, and conducting solidification and die pressing through a hog pressing machine to obtain the soft magnetic composite material. The method is simple in process, low in cost, favorable for operation and capable of achieving good magnetic performance and dynamic strength of the composite material by adjusting the content of the magnetic powder. The shape is controllable, and the mechanical performance is good.