FIELD: process engineering.
SUBSTANCE: invention relates to metallurgy and may be used in producing large-size long castings for gas turbine units and engines from monocrystalline heat resistant nickel alloys operated at 1500°C. Castings are produced in ceramic mould made up of starting cavity, moulding cavity and dozzle section. Starting cavity and moulding cavity are arranged at 90-120° to dozzle section. Ceramic mould is heated to preset temperature while heat resistant nickel alloy is heated in melting crucible to temperature exceeding liquidus temperature to fill melt into ceramic mould. Cast directed crystallisation is conducted by radiation method on displacing ceramic mould from heating zone into cooling zone at preset rate. Ceramic mould is displaced horizontally while crystallisation is performed at metallostatic pressure of 5-25 g/cm2.
EFFECT: higher precision and yield.
2 cl, 1 dwg, 1 ex
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