Superalloy optimized for high-temperature performance in high-pressure turbine disks

US6521175B1 · kind B1 · utility

Assignee

• General Electric Company · US

Inventors

• David Paul Mourer · Danvers, US
• Eric Scott Huron · Marietta, US
• Kenneth Rees Bain · Loveland, US
• Enrique E. Montero · Marlborough, US
• Paul L. Reynolds · Tolland, US
• John J. Schirra · Guilford, US

Key dates

• Filing date: Feb 9, 1998
• Grant date: Feb 18, 2003
• Expiry date: Feb 9, 2018

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B22F2998/10
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A superalloy has a composition of, in weight percent, from about 16.0 percent to about 22.4 percent cobalt, from about 6.6 percent to about 14.3 percent chromium, from about 1.4 percent to about 3.5 percent tantalum, from about 1.9 percent to about 4.0 percent tungsten, from about 1.9 percent to about 3.9 percent molybdenum, from about 0.03 percent to about 0.10 percent zirconium, from about 0.9 percent to about 3.0 percent niobium, from about 2.4 percent to about 4.6 percent titanium, from about 2.6 percent to about 4.8 percent aluminum, from 0 to about 2.5 percent rhenium, from about 0.02 percent to about 0.10 percent carbon, from about 0.02 percent to about 0.10 percent boron, balance nickel and minor amounts of impurities. The superalloy is advantageously utilized in aircraft gas turbine disks.