Process for producing a thermally loaded casting

US6412541B2 · kind B2 · utility

Assignee

• Alstom Power N.V. · NL

Inventors

• Hans-Joachim Roesler · Braunschweig, DE
• Alexander Beeck · Orlando, US
• Peter Ernst · Hattersheim, DE
• Reinhard Fried · Nussbaumen, CH

Key dates

• Filing date: Apr 18, 2001
• Grant date: Jul 2, 2002
• Expiry date: Apr 18, 2021

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F05D2300/612
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

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).