MANUFACTURE OF METAL CORE BY USING RAPID PROTOTYPING METHOD AND METHOD FOR MANUFACTURING PRECISION PARTS THROUGH HOT ISOSTATIC PRESSING USING SAME, AND TURBINE BLISK FOR DRIVING LIQUID ROCKET TURBO PUMP USING SAME

摘要

Disclosed is a method for manufacturing precision parts through hot isostatic pressing using a metal core manufactured through metal rapid prototyping to manufacture a turbine blisk for driving a turbo pump of a liquid rocket. The method includes: manufacturing a metal core that has an internal vacant space having the same shape as the precision parts, using rapid prototyping; putting the metal core in a housing; filling an inside of the housing with heat resistant steel powder and creating a vacuum state in the housing; treating the housing under high temperature and pressure to produce heat resistant steel; removing the housing and a portion of the heat resistant steel to expose a portion of the metal core; performing etching to remove the exposed metal core; and removing only a portion of the heat resistant steel through mechanical machining, wherein the remaining portion corresponds to the shape of the precision part.