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 0.3% to about 0.6% carbon, about 0.2% to about 0.8% niobium, about 0.2% to about 0.8% nitrogen, and a balance of iron. Molybdenum and tungsten are excluded. The alloy is suitable for use in turbocharger turbine housing applications for temperature up to about 980° C.
Claims13
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;
- 1.0% to 2.0% silicon;
- 0.3% to 0.6% carbon;
- 0.2% to 0.8% niobium;
- 0.2% to 0.8% nitrogen;
- and
- a balance of iron, with the proviso that molybdenum and tungsten are excluded from the alloy.
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;
- 1.0% to 2.0% silicon;
- 0.3% to 0.6% carbon;
- 0.2% to 0.8% niobium;
- 0.2% to 0.8% nitrogen;
- and
- a balance of iron, with the proviso that molybdenum and tungsten are excluded from the alloy.
Dependencies are inferred from the claim text.