Method of manufacturing a component with a protective arrangement which prevents aluminizing or chromizing during gas diffusion coating

US5725905A · kind A · utility

Assignee

• MTU Motoren-und Turbinen-Union · DE

Inventors

• Heinrich Walter · Friedberg, DE
• Horst Pillhofer · Weingarten, DE
• Michael J. Strasser · San Francisco, US
• Frank Brungs · Dachau, DE
• Ralph Kropp · Hersbruck, DE
• Martin Schaipp · Junkenhofen, DE

Key dates

• Filing date: Feb 26, 1996
• Grant date: Mar 10, 1998
• Expiry date: Feb 26, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02T50/60
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method for selectively protecting a component made of an iron-base alloy, cobalt-base alloy or nickel-base alloy with a protective arrangement which protects select areas of the component from aluminizing or chromizing during gas diffusion coating, wherein a first layer acts as an interlayer and a second layer acts as a getter layer for reaction gases. The method comprises the steps of depositing a first layer of slip cast material comprising oxide ceramic particles carried in a low-carbon, halide free, liquid vehicle; depositing a second layer comprising metal or a metallic slip, which comprises at least 50% by weight of the base metal of the component and all major alloy constituents of the component; aluminizing or chromizing by gas diffusion coating; and removing the protective arrangement from the component.