The invention discloses an iron-based soft
magnetic composite. The iron-based soft
magnetic composite comprises atomized iron-based
powder, ultra-fine high
melting point inorganics and
lubricant, wherein
phosphate and an organic
silicone resin insulating layer cover the surface of the atomized iron-based
powder. A preparation method of the iron-based soft
magnetic composite comprises the following steps that the atomized iron-based
powder and the ultra-fine high
melting point inorganics are fully mixed to obtain a mixture, high-temperature heating treatment is conducted on the mixture in a non-oxidizing
atmosphere, heat preservation is conducted on the mixture for above 30min, the mixture is cooled to enable the temperature of the mixture to be the
room temperature, surface phosphating treatment and organic
silicon resin covering are conducted on obtained
iron powder isolated through the inorganics, and then pressing annealing is carried out. Due to the fact that the
iron powder is isolated through the ultra-fine high
melting point inorganics, annealing can be conducted on the
iron powder at a high temperature of about 1000 DEG C,
sintering cannot happen, and the iron powder has high
compressibility; an insulating layer covers the surface of the iron powder after phosphating treatment is conducted on the iron powder,
phosphide has a lubricating effect on the iron powder,
internal friction is reduced in the pressing process, and the compaction density of the powder is improved; due to the fact that organic
silicon resin is added, distribution of the insulating layer on the surface of the iron powder is improved, and the soft magnetic property is optimized after forming
sintering is conducted on the powder.