Fe Fe Method for manufacturing Fe based soft magnetic alloy and Fe based soft magnetic alloy therefrom

摘要

A method for manufacturing an Fe-based soft magnetic alloy is provided. Fe-based soft magnetic alloy according to an embodiment of the present invention is an empirical formula Fe a B b C c Cu d (provided that a, b, c and d are at% (atomic percent) of the element, 78.5≤a≤86 , 13.5≤b+c≤21, 0.5≤d≤1.5) comprising the steps of preparing an Fe-based initial alloy represented by, and heat-treating the Fe-based initial alloy, wherein the heat treatment is the Fe-based initial alloy of the crystallization initiation temperature (Tx 1 ) of the primary heat treatment performed at a higher first heat treatment temperature, and after the first heat treatment, the secondary heat treatment is performed at a second heat treatment temperature lower than the first heat treatment temperature. According to this, it is easy to manufacture a Fe-based soft magnetic alloy in which the implemented Fe-based soft magnetic alloy has a high maximum magnetic flux density and magnetic permeability, while also having a low coercive force and a low magnetic loss such as low core loss. In addition, even if the Fe-based soft magnetic alloy is repeatedly produced tens or hundreds of times under the same conditions, it is possible to achieve uniform magnetic properties between the soft magnetic alloys, so it is very suitable for mass production. Furthermore, the Fe-based soft magnetic alloy realized through this has a high saturation magnetic flux density and a remarkably low magnetic loss, so it can be widely applied as a magnetic material for various coil parts or electromagnetic shielding materials.