Nickel-Base Superalloy

Abstract

A nickel-base superalloy is characterized by the following chemical composition (details in % by weight): 7.7-8.3 Cr, 5.0-5.25 Co, 2.0-2.1 Mo, 7.8-8.3 W, 5.8-6.1 Ta, 4.9-5.1 Al, 1.3-1.4 Ti, 0.11-0.15 Si, 0.11-0.15 Hf, 200-750 ppm C, 50-400 ppm B, 0.1-5 ppm S, 5-100 ppm Y and/or 5-100 ppm La, remainder Ni and production-related impurities. The alloy is distinguished by very good casting properties, a high resistance to oxidation, and good compatibility with TBC layers applied to its surface.

1 . A nickel-base superalloy having the following chemical composition, in % by weight: 
 7.7-8.3 Cr    5.0-5.25 Co    2.0-2.1 Mo    7.8-8.3 W    5.8-6.1 Ta    4.9-5.1 Al    1.3-1.4 Ti    0.11-0.15 Si    0.11-0.15 Hf    200-750 ppm C    50-400 ppm B    <5 ppm S    5-100 ppm Y and/or 5-100 ppm La    remainder nickel and production-related impurities.    
   
   
       2 . The nickel-base superalloy as claimed in  claim 1 , having the following chemical composition, in % by weight: 
 7.7-8.3 Cr    5.0-5.25 Co    2.0-2.1 Mo    7.8-8.3 W    5.8-6.1 Ta    4.9-5.1 Al    1.3-1.4 Ti    0.11-0.15 Si    0.11-0.15 Hf    200-300 ppm C    50-100 ppm B    max. 2 ppm S    10-80 ppm Y and/or 10-80 ppm La    remainder nickel and production-related impurities.    
   
   
       3 . The nickel-base superalloy as claimed in  claim 2 , having the following chemical composition, in % by weight: 
 7.7 Cr    5.1 Co    2.0 Mo    7.8 W    5.8 Ta    5.0 Al    1.4 Ti    0.12 Si    0.12 Hf    200 ppm C    50 ppm B    1 ppm S    50 ppm Y    10 ppm La    remainder nickel and production-related impurities.