Preparation method of monomer linear amorphous alloy iron core

The invention relates to the technical field of metallurgy, and discloses a preparation method of a monomer linear amorphous alloy iron core. According to the method, an appropriate amount of cobalt element with high ferromagnetic property and high magnetic susceptibility is added on the basis of Fe-based amorphous alloy, so that the magnetic-lag anisotropy of the amorphous alloy is increased, and the sensitivity of the alloy for a magnetic field is improved; meanwhile, when the amorphous alloy is annealed at a constant temperature, a transverse magnetic field is applied to the amorphous alloy, and the direction of the magnetic-lag anisotropy is controlled, so that the magnetic-lag loop of the material is adjusted; after annealing is finished, the amorphous alloy is quickly cooled to below the Curie temperature of the amorphous alloy in a rapid quenching manner in the state that the application of the transverse magnetic field is continued to be maintained, atomic magnetic moments arranged along the same direction of the action of the magnetic field in the magnetic domain of the amorphous alloy are quickly cured, and alloy atoms are prevented from causing the influence of alloy to be influenced by metal inherent microstructure crystal and atom arrangement change due to thermal motion broken magnetic moment orientation and too slow alloy cooling. The finally prepared amorphous alloy iron core is high in linearity, low in iron core loss and high in magnetic conductivity.