Nickel base superalloy with improved machinability and method of making thereof

US6231692A · kind A · utility

Assignees

• Howmet Research Corporation · US
• Siemens Aktiengesellschaft · DE

Inventors

• Russell G. Vogt · Yorktown, US
• John Corrigan · Garden Grove, US
• John R. Mihalisin · West Caldwell, US
• Ursula Pickert · Wetter (Ruhr), DE
• Winfried Esser · Bochum, DE

Key dates

• Filing date: Jan 28, 1999
• Grant date: May 15, 2001
• Expiry date: Jan 28, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C22C19/056
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Machineable nickel base alloy casting, consisting essentially of, in weight %, about 12.5% to 15% Cr, about 9.00% to 10.00% Co, about 3.70% to 4.30% Mo, about 3.70% to 4.30% W, about 2.80% to 3.20% Al, about 4.80% to 5.20% Ti, about 0.005% to 0.02% B, up to about 0.10% Zr, and balance essentially Ni and carbon below about 0.08 weight % to improve machinability while retaining alloy strength properties after appropriate heat treatment.