Method for manufacturing iron-silicon sintered soft magnetic alloy

摘要

The present invention relates to a method for producing a Fe-Si soft magnetic alloy used as a magnetic core material such as a transformer, a motor, a generator core, and a yoke material of a magnetic circuit. The present invention provides a method for producing a Fe-Si-based sintered soft magnetic alloy having excellent soft magnetic properties even at low temperatures.;In order to achieve the above object, the present invention comprises a Fe-Si + Mx compound composition in the method for producing a soft magnetic alloy containing Fe-Si as a main component, M is B, Sn, Cr, V, P, C, One or two or more selected from Al and Zn, and X is melted by a plasma arc in an inert atmosphere in a composition range of 0.1-2% by weight, and then cooled to a rotation speed range of 8-35 m / sec. Preparing a quench powder;;Grinding the quench powder and classifying it into a particle size range of 38-150 μm;;Adding a binder in the range of 0.5-3% by weight relative to the total Fe-Si alloy powder weight, and mixing the powder to form a pressure in the range of 1-10 ton / cm ² ; And;Sintering the molded body in a temperature range of 1100-1350 ℃ for 0.5-4 hours; It relates to a method for manufacturing a Fe-Si-based sintered soft magnetic alloy comprising the technical gist.