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, Ted Pozniak
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Abstract
Disclosed is an ferritic stainless steel alloy that includes, by weight, about 20% to about 22% chromium, about 0% to about 0.5% nickel, about 0.5% to about 1.0% manganese, about 1.0% to about 2.5% silicon, about 1.5% to about 2.2% tungsten, about 1.3% to about 1.8% niobium, about 0.35% to about 0.45% carbon, and a balance of iron. The alloy is suitable for use in turbocharger turbine housing applications for temperature up to about 1050° C.
Claims20
An ferritic stainless steel alloy, comprising, by weight:
- about 20% to about 22% chromium;
- about 0% to about 0.5% nickel;
- about 0.5% to about 1.0% manganese;
- about 1.0% to about 2.5% silicon;
- about 1.5% to about 2.2% tungsten;
- about 1.3% to about 1.8% niobium;
- about 0.35% to about 0.45% carbon;
- and
- a balance of iron.
A turbocharger turbine housing comprising:
- an ferritic stainless steel alloy, wherein the ferritic stainless steel alloy comprises, by weight:
- about 20% to about 22% chromium;
- about 0% to about 0.5% nickel;
- about 0.5% to about 1.0% manganese;
- about 1.0% to about 2.5% silicon;
- about 1.5% to about 2.2% tungsten;
- about 1.3% to about 1.8% niobium;
- about 0.35% to about 0.45% carbon;
- and
- a balance of iron.
A method of fabricating a turbocharger turbine housing, the method comprising the step of:
- forming the turbocharger turbine housing from an ferritic stainless steel alloy, wherein the ferritic stainless steel alloy comprises, by weight:
- about 20% to about 22% chromium;
- about 0% to about 0.5% nickel;
- about 0.5% to about 1.0% manganese;
- about 1.0% to about 2.5% silicon;
- about 1.5% to about 2.2% tungsten;
- about 1.3% to about 1.8% niobium;
- about 0.35% to about 0.45% carbon;
- and
- a balance of iron.
Dependencies are inferred from the claim text.