Component made of an intermetallic compound with an aluminum diffusion coating

US5562999A · kind A · utility

Assignee

• MTU Motoren-und Turbinen-Union München GmbH · DE

Inventors

• Richard Grunke · Munich, DE
• Lothar Peichl · Dachau, DE
• Walter Heinrich · Novi, US
• Horst Pillhoefer · Weingarten, DE
• Frank Brungs · Dachau, DE

Key dates

• Filing date: Mar 9, 1995
• Grant date: Oct 8, 1996
• Expiry date: Mar 9, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12806
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A component made of an intermetallic compound of titanium and aluminum, or of alloys of such intermetallic compounds with alloying additions forming the base material, and with an aluminum diffusion coating on the base material, is provided. The component has, between the base material and the aluminum diffusion coating, a closed zone which is close to the surface and has a recrystallization structure. For this purpose, the component is cold-formed or slightly melted in a zone which is close to the surface, is then annealed at the recrystallization temperature, and finally has an aluminum diffusion coating applied to the recrystallized zone. The process is used for components in engines and, particularly, for components in the hot-gas duct of an engine.