PROCESS FOR PRODUCTION OF IRON-BASE AMORPHOUS MATERIAL

摘要

A process for producing an amorphous material at a low cost by efficiently removing Al and Ti which are causative of the deterioration of magnetic characteristics even when an inexpensive raw material such as Fe-B or scrap is used. In producing an iron-base amorphous material consisting of, by mass, 2 to 4% B, 1 to 6% Si and the balance Fe with unavoidable impurities, when the Ti or Al concentration of molten iron after the melting of the main raw material is 0.005% by mass or above, Ti and Al contained in the molten iron are removed through oxidation by the addition of an iron oxide source containing at least 55% by mass of iron to such an extent that the concentrations of both are lowered to below 0.005% by mass respectively, while when a main raw material whose composition has a Ti or Al concentration of 0.005% by mass or above is used, an iron oxide source containing at least 55% by mass of iron together with the main raw material is preliminarily charged into a melting furnace.