METHOD FOR FORMING SINGLE CRYSTAL PARTS USING ADDITIVE MANUFACTURING AND REMELT

摘要

A method of forming a metal single crystal turbine component with internal passageways includes forming a polycrystalline turbine blade with internal passageways by additive manufacturing and filling the passageways with a core ceramic slurry. The ceramic slurry is then treated to harden the core and the turbine component is encased in a ceramic shell which is treated to form a ceramic mold. The turbine component in the mold is then melted and directionally solidified in the form of a single crystal. The outer shell and inner ceramic core are then removed to form a finished single crystal turbine component with internal passageways.

主权项

1. A method of forming a metal single crystal turbine component with internal passageways comprising:
forming a polycrystalline metal turbine component with internal passageways by an additive manufacturing process; filling the internal passageways with a core ceramic slurry; treating the ceramic slurry to form a ceramic core; encasing the metal component in a ceramic shell; treating the ceramic shell to form a ceramic mold; placing the ceramic mold in a furnace and melting the metal turbine component; directionally solidifying the melt to form a metal single crystal turbine; and cooling the mold, removing the outer shell and inner ceramic core to reveal a finished metal single crystal turbine component with internal passageways.