METHOD OF MAKING INGOTS FROM NONFERROUS METAL ALLOYS Russian patent published in 2013 - IPC B22D11/01 B22D27/02 

FIELD: process engineering.

SUBSTANCE: invention relates to nonferrous metallurgy. Metal melt is fed into are of effects induced by electromagnetic field of inductor 1 that prevents spreading of melt in crystallisation area. Cooling fluid 6 is fed directly onto said melt. Electromagnetic forces drive said melt along path 5 to equalise cooling conditions over the entire cross-section. To accelerate melt crystallisation, radius of sphere inscribed in cast ingot volume should make at least 20 mm. Electromagnetic field frequency is selected in compliance with relationship where γ is melt conductivity, r_in is radius of sphere inscribed in cast ingot volume, µ₀ is magnetic constant.

EFFECT: higher quality of ingots due fine-grained structure that features grain size under 20 mcm.

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