Verfahren zur Herstellung von weich-magnetischen Legierungen hoher permeabilität und Legierungen

摘要

Process for the production of soft magnetic alloys with very high permeability, in which an ingot of an alloy containing in its composition more than 70 % of nickel or more than 45 % of cobalt is prepared by melting, the metal having or not having been subjected to a stage of secondary metallurgy, the ingot is remelted under electrically conductive slag, the remelted ingots being converted into strips after hot rolling and then cold rolling, the strips being next subjected to a treatment for the development of magnetic characteristics, in which process the alloy is remelted under an electrically conductive slag containing at least the first three components of the system CaF2, CaO, SiO2, Al2O3, and defining a region in the ternary diagram which is bounded by the following proportions by weight: CaF2 (50-75) % CaO (20-30) % SiO2 (5-15) % with Al2O3 <3 %.