METHOD OF CASTING OF RING-LIKE INGOTS FROM REFRACTORY DIFFICULT-TO-FORM NICKEL-BASED ALLOYS Russian patent published in 2011 - IPC B22D27/04 

FIELD: process engineering.

SUBSTANCE: invention relates to metallurgy, particularly, to produce and deform ingots from refractory difficult-to-form nickel alloys operated at above 600°C, particularly, gas turbine composite plates, rolled rings, etc. Proposed method comprises vacuum-induction casting of alloy to produce charge, making ceramic mould, melding charge of refractory alloy, casting melt into ceramic mould and performing directed crystallisation in ceramic mould. Ceramic mould is made up of outer and inner parts and baffle inserts. Mould inner part is fitted on outer part bottom. Space between outer part inner wall and inner part outer wall are divided in height by baffle inserts into two parts equal to ingot height. Said inserts have bores for filling and feeding bottom ingots in directed crystallisation of ingots.

EFFECT: reduced labor input, higher metal use factor.

2 dwg, 1 tbl, 2 ex