US 6,412,541 B2 · Process for producing a thermally loaded casting

Abstract

A thermally highly loaded casting is produced. The casting mold is produced from a slurry using a wax model and a polymer foam which is fixed to the wax model or has been introduced into a cavity. In this way, during the casting process the liquid superalloy also penetrates into the open-cell structure of the casting mold, so that an integral cooling structure is formed during the solidification of the casting. A single-crystal or directionally solidified casting is advantageously produced. It is also conceivable to vary the cell size of the polymer foam, to produce a cooling structure and a base material separately, and to coat the cooling structure with a ceramic protective layer (thermal barrier coating).

Claims16

Dependent claims

A process for producing a thermally loaded casting of a thermal turbomachine having an integrated cooling structure and being produced using a casting mold, wherein the process comprises:

(a) preparing a wax model of the part to be cooled,
(b) preparing at least one polymer foam, and fixing the foam to the wax model or introducing the foam into a cavity in the wax model,
(c) immersing the at least one polymer foam and the wax model in a slurry of ceramic material, the ceramic material accumulating around the wax model and filling the polymer foam,
(d) drying the ceramic material,
(e) removing the wax and the at least one polymer foam by a heat treatment to produce the casting mold,
(f) introducing molten alloy material into the casting mold, and
(g) removing the ceramic material.

4 more elements

Dependencies are inferred from the claim text.

Process for producing a thermally loaded casting

Life of this patent

Process for producing a thermally loaded casting

Life of this patent

Abstract

Claims16