METHOD TO PRODUCE MICROINGOTS FROM MELT BY CENTRIFUGAL DISINTEGRATION Russian patent published in 2014 - IPC B22F9/10 

FIELD: metallurgy.

SUBSTANCE: invention relates to metallurgy, to manufacturing of ingots aimed at further processing by hot isosatic pressing (HIP). Method to produce microingots from a melt by centrifugal disintegration involves melting of a cast block by a plasma jet formed by orifice gas supplied to the end of the fast rotating block with melt particles being produced, the latter harden into microingots when flying in the atmosphere of cold orifice gas. In the course of cast block melting, hydrogen is introduced into the plasma jet, it is provided for its ionisation and interaction of hydrogen ions with the oxides on the surface of the melt and microingots and with the orifice gas oxygen, the resulting moisture is removed from the cold orifice gas by freezing. Hydrogen is introduced into the plasma jet in the amount providing for keeping of the hydrogen residual concentration in the cold orifice gas at the level not exceeding 10 ppm.

EFFECT: quality of the produced microingots is improved due to the reduction of oxygen content in them, better mechanical properties of compact material of items.

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