METHOD FOR MELTING WITH DIRECTIONAL CRYSTALIZATION OF MAGNETIC ALLOY OF THE Fe-Al-Ni-Co SYSTEM Russian patent published in 2018 - IPC C30B11/04 C30B29/52 C22C33/04 C22C38/06 C22C38/08 C22C38/10 C22C38/16 H01F1/47 

FIELD: metallurgy.

SUBSTANCE: invention relates to the field of metallurgy, namely to the technology of producing magnetic alloys of the iron-aluminum-nickel-cobalt system used to obtain permanent magnets of electric motors and navigational devices. Method comprises placing a polycrystalline billet from an alloy on a seed in a ceramic mold, placing the ceramic mold in the region of the heater above the cooler and performing the process of directional crystallization of the alloy in the presence of a temperature gradient ahead of the crystallization front, wherein the polycrystalline billet of the alloy is preliminarily melted and its temperature raised to 1,580–1,620 °C, molten polycrystalline billet is poured into the preheated to a temperature of 1,500–1,600 °C ceramic form, it is held in it for 0.5–1 min and the process of directional crystallization of the alloy is carried out by moving the ceramic mold into a liquid metal cooler with a temperature of 300–320 °C at a rate of 1–5 mm/min under conditions of the temperature gradient at the crystallization front of 100–150 deg/cm.

EFFECT: producing billets of the magnetic alloy of the iron-aluminum-nickel-cobalt system with misorientation of the crystals within 5 degrees, and also the provision of high magnetic properties (residual induction B_r, coercitive force by induction H_cb, maximum energy product (BH)_max) of the alloys.

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