Turbine wheel incorportating nickel-based alloy
View Patent ↗Turbocharger turbine wheels including nickel-based alloys are disclosed herein. In one exemplary embodiment, a turbocharger turbine wheel includes as, at least part of its constituency, a nickel-based alloy that includes, on a weight basis of the overall alloy: about 10.5% to about 11.5% cobalt, about 9.0% to about 10.0% chromium, about 5.75% to about 6.25% aluminum, about 2.8% to about 3.3% tantalum, about 4.0% to about 4.5% molybdenum, about 2.2% to about 2.4% titanium, about 0.13% to about 0.15% carbon, about 0.03 to about 0.09% zirconium, and a majority of nickel. The nickel-based alloy excludes tungsten except in unavoidable trace amounts. The turbocharger turbine wheel may be configured for operating at about 980° C. to about 1020° C.
1. A turbocharger turbine wheel comprising, at least as a part of its overall composition, a nickel-based alloy, wherein the nickel-based alloy comprises, on a weight basis of the overall alloy:
about 10.5% to about 11.5% cobalt;
about 9.0% to about 10.0% chromium;
about 5.75% to about 6.25% aluminum;
about 2.8% to about 3.3% tantalum;
about 4.0% to about 4.5% molybdenum;
about 2.2% to about 2.4% titanium;
about 0.13% to about 0.15% carbon;
about 0.03% to about 0.09% zirconium; and
a majority of nickel, with the proviso that tungsten is not included beyond impurity levels.
2. The turbocharger turbine wheel of claim 1 , wherein the nickel-based alloy comprises cobalt in an amount of about 11.7% to about 11.3%.
3. The turbocharger turbine wheel of claim 1 , wherein the nickel-based alloy comprises chromium in an amount of about 9.2% to about 9.8%.
4. The turbocharger turbine wheel of claim 1 , wherein the nickel-based alloy comprises aluminum in an amount of about 5.9% to about 6.1%.
5. The turbocharger turbine wheel of claim 1 , wherein the nickel-based alloy comprises tantalum in an amount of about 2.9% to about 3.2%.
6. The turbocharger turbine wheel of claim 1 , wherein the nickel-based alloy comprises molybdenum in an amount of about 4.1% to about 4.4%.
7. The turbocharger turbine wheel of claim 1 , wherein the nickel-based alloy comprises titanium in an amount of about 2.25% to about 2.35%.
8. The turbocharger turbine wheel of claim 1 , wherein the turbocharger turbine wheel is configured for operation at a temperature range of about 980° C. to about 1020° C.
9. The turbocharger turbine wheel of claim 1 , wherein the turbocharger turbine wheel is configured for operation at a temperature range of about 980° C. to about 1020° C.
10. A turbocharger turbine wheel comprising, at least as a part of its overall composition, a nickel-based alloy, wherein the nickel-based alloy consists of, on a weight basis of the overall alloy:
about 10.5% to about 11.5% cobalt;
about 9.0% to about 10.0% chromium;
about 5.75% to about 6.25% aluminum;
about 2.8% to about 3.3% tantalum;
about 4.0% to about 4.5% molybdenum;
about 2.2% to about 2.4% titanium;
about 0.13% to about 0.15% carbon;
about 0.03% to about 0.09% zirconium; and
silicon in an amount of less than about 0.2%;
boron in an amount of less than about 0.02%;
manganese in an amount of less than about 0.2%;
sulfur in an amount of less than about 0.015%; and
a majority of nickel, with the proviso that inevitable/unavoidable impurities may be present in trace amounts.
11. The turbocharger turbine wheel of claim 10 , wherein the nickel-based alloy consists of cobalt in an amount of about 11.7% to about 11.3%.
12. The turbocharger turbine wheel of claim 10 , wherein the nickel-based alloy consists of chromium in an amount of about 9.2% to about 9.8%.
13. The turbocharger turbine wheel of claim 10 , wherein the nickel-based alloy consists of aluminum in an amount of about 5.9% to about 6.1%.
14. The turbocharger turbine wheel of claim 10 , wherein the nickel-based alloy consists of tantalum in an amount of about 2.9% to about 3.2%.
15. The turbocharger turbine wheel of claim 10 , wherein the nickel-based alloy consists of molybdenum in an amount of about 4.1% to about 4.4%.
16. The turbocharger turbine wheel of claim 10 , wherein the nickel-based alloy consists of titanium in an amount of about 2.25% to about 2.35%.
17. A turbocharger turbine wheel comprising, at least as a part of its overall composition, a nickel-based alloy consisting of, on a weight basis of the overall alloy:
about 10.7% to about 11.3% cobalt;
about 9.2% to about 9.8% chromium;
about 5.9% to about 6.1% aluminum;
about 2.9% to about 3.2% tantalum;
about 4.1% to about 4.4% molybdenum;
about 2.25% to about 2.35% titanium;
about 0.13% to about 0.15% carbon;
about 0.03% to about 0.09% zirconium;
silicon in an amount of less than about 0.2%;
boron in an amount of less than about 0.02%;
manganese in an amount of less than about 0.2%;
sulfur in an amount of less than about 0.015%; and
a majority of nickel, with the proviso that inevitable/unavoidable impurities may be present in trace amounts.
18. The turbocharger turbine wheel of claim 17 , wherein the turbocharger turbine wheel is configured for operation at a temperature range of about 980° C. to about 1020° C.