Method for the manufacturing high-temperature resistant engine components

Abstract

For near net shape manufacturing of high-temperature resistant engine components of geometrically complex design consisting of an intermetallic phase, a low melting-point metallic phase in the molten state or in a temperature range near the molten state is mixed with a high melting-point metallic phase provided as a metal powder, and the mixture is mechanically treated under the effect of kneading and shear forces, thereby heating it up and reducing its viscosity. In a subsequent injection moulding process the engine component substantially matching the final contour is formed and mechanically finish-machined, if required, and afterwards subjected to a heat treatment for creating an intermetallic phase.

What is claimed is: 
     
         1 . Method for near net shape manufacturing of high-temperature resistant engine components of geometrically complex design consisting of an intermetallic phase, characterized in that at least one low melting-point metallic phase in the molten state or in a temperature range near the molten state is mixed with at least one high melting-point metallic phase provided as a metal powder, that the mixture is mechanically treated, thereby heating it up and reducing its viscosity, and that subsequently in an injection moulding process the engine component substantially matching the final contour is formed and afterwards subjected to a heat treatment for creating an intermetallic phase. 
     
     
         2 . Method in accordance with  claim 1 , characterized in that mixing of the low melting-point phase and the high melting-point phase is performed in an extruder under the effect of kneading and shear forces. 
     
     
         3 . in accordance with  claim 1 , characterized in that the metal powder/ melt mixture is additionally heated by heating means. 
     
     
         4 . in accordance with  claim 1 , characterized in that the engine component demoulded after solidification is subjected to a finish-machining process before the heat treatment.