Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same
AssigneeHoneywell International Inc.
InventorsPavan Chintalapati, Marc Wilson, Rayad Benchiheub, Philippe Renaud, Gary Agnew, Nicolas Devulder
Life of this patent
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Abstract
Disclosed is an austenitic stainless steel alloy that includes, by weight, about 22% to about 28% chromium, about 3.5% to about 6.5% nickel, about 1% to about 6% manganese, about 0.5% to about 2.5% silicon, about 0.5% to about 1.5% tungsten, about 0.2% to about 0.8% molybdenum, about 0.2% to about 0.8% niobium, about 0.3% to about 0.6% carbon, about 0.2% to about 0.8% nitrogen, and a balance of iron. The alloy is suitable for use in turbocharger turbine housing applications for temperature up to about 1020° C.
Claims18
An austenitic stainless steel alloy, comprising, by weight:
- 22% to 28% chromium;
- 3.5% to 6.5% nickel;
- 1% to 6% manganese;
- 0.5% to 2.5% silicon;
- 0.8% to 1.2% tungsten;
- 0.2% to 0.8% molybdenum;
- 0.2% to 0.8% niobium;
- 0.3% to 0.6% carbon;
- 0.2% to 0.8% nitrogen;
- and
- a balance of iron, with the proviso that the stainless steel alloy excludes calcium.
An turbocharger turbine housing comprising:
- an austenitic stainless steel alloy, wherein the austenitic stainless steel alloy comprises, by weight:
- 22% to 28% chromium;
- 3.5% to 6.5% nickel;
- 1% to 6% manganese;
- 0.5% to 2.5% silicon;
- 0.8% to 1.2% tungsten;
- 0.2% to 0.8% molybdenum;
- 0.2% to 0.8% niobium;
- 0.3% to 0.6% carbon;
- 0.2% to 0.8% nitrogen;
- and
- a balance of iron, with the proviso that the stainless steel alloy excludes calcium.
A method of fabricating a turbocharger turbine housing, the method comprising the step of:
- forming the turbocharger turbine housing from an austenitic stainless steel alloy, wherein the austenitic stainless steel alloy comprises, by weight:
- 22% to 28% chromium;
- 3.5% to 6.5% nickel;
- 1% to 6% manganese;
- 0.5% to 2.5% silicon;
- 0.8% to 1.2% tungsten;
- 0.2% to 0.8% molybdenum;
- 0.2% to 0.8% niobium;
- 0.3% to 0.6% carbon;
- 0.2% to 0.8% nitrogen;
- and
- a balance of iron, with the proviso that the stainless steel alloy excludes calcium.
Dependencies are inferred from the claim text.