Method for forming an environmentally resistant blade tip

US5622638A · kind A · utility

Assignee

• General Electric Company · US

Inventors

• Jerry D. Schell · Evendale, US
• Howard J. Farr · Blue Ash, US
• Thomas Joseph Kelly · Cincinnati, US
• Paul J. E. Monson · Loveland, US
• Stephen Joseph Ferrigno · Cincinnati, US

Key dates

• Filing date: May 15, 1996
• Grant date: Apr 22, 1997
• Expiry date: May 15, 2016

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/12944
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A method for forming a blade tip on a turbine blade of a gas turbine engine includes providing a powder alloy from a family of environmentally-resistant powder alloys and forming the blade tip by melting and fusing the powder alloy to the turbine blade. The blade tip alloys preferably have a chemical composition of, in weight percent, about 14 to about 18 percent chromium, about 6.45 to about 6.95 percent aluminum, about 9.75 to about 11.45 percent cobalt, about 5.95 to about 6.55 percent tantalum, about 1.85 to about 2.35 percent rhenium, about 0.05 to about 1.75 percent hafnium, about 0,006 to about 0.03 percent zirconium, about 0.02 to about 0.11 percent carbon, up to about 1.1 percent silicon, up to about percent 0.01 percent boron, with the balance being nickel and typical impurities.