Nickel-based superalloy
View Patent ↗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, 1.0-1.5 Ti, 1.0-2.0 Re, 0.11-0.15 Si, 0.1-0.7 Hf, 0-0.5 Nb, 0.02-0.17 C, 50-400 ppm B, remainder Ni and production-related impurities. The alloy is distinguished by a very high resistance to oxidation, resistance to corrosion and good creep properties at high temperatures.
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
1.0-1.5 Ti
1.0-2.0 Re
0.1-0.2 Nb
0.11-0.15 Si
0.1-0.7 Hf
0.02-0.17 C
50-400 ppm B
remainder nickel and production-related impurities.
2. The nickel-base superalloy as claimed in claim 1 , wherein the Re content is 1.0-1.5% by weight.
3. The nickel-base superalloy as claimed in claim 1 , wherein the Re content is 1.5% by weight.
4. The nickel-base superalloy as claimed in claim 1 , wherein the Nb content is 0.1% by weight.
5. The nickel-base superalloy as claimed in claim 1 , wherein the Hf content is 0.1-0.6% by weight.
6. The nickel-base superalloy as claimed in claim 1 , wherein the Hf content is 0.1% by weight.
7. The nickel-base superalloy as claimed in claim 1 , wherein the C content is 0.02-0.095 by weight.
8. The nickel-base superalloy as claimed in claim 1 , wherein the C content is 0.02-0.03% by weight.
9. The nickel-base superalloy as claimed in claim 1 , wherein the B content is 50-100 ppm.
10. The nickel-base superalloy as claimed in claim 1 , wherein the B content is 90 ppm.
11. The nickel-base superalloy as claimed in claim 1 , having the following chemical composition (in % by weight):
8.2 Cr
5.2 Co
2.1 Mo
8.1 W
6.1 Ta
5.0 Al
1.4 Ti
1.5 Re
0.1-0.2 Nb
0.12 Si
0.1-0.6 Hf
0.095-0.17 C
240-290 ppm B
remainder nickel and production-related impurities.
12. The nickel-base superalloy as claimed in claim 1 , having the following chemical composition (in % by weight):
8.2 Cr
5.2 Co
2.1 Mo
8.1 W
6.1 Ta
5.0 Al
1.4 Ti
1.5 Re
0.1 Nb
0.12 Si
0.1 Hf
200 ppm C
90 ppm B
reminder nickel and production-related impurities.
13. A nickel-base superalloy, having the following chemical composition (in % by weight):
8.2 Cr
5.2 Co
2.1 Mo
8.1 W
6.1 Ta
5.0 Al
1.4 Ti
1.5 Re
0-0.2 Nb
0.12 Si
0.1-0.6 Hf
0.095-0.17 C
240-290 ppm B
remainder nickel and production-related impurities.