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, Ted Pozniak
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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% nitrogen, and a balance of iron. Molybdenum, niobium, and tungsten are excluded. The alloy is suitable for use in turbocharger turbine housing applications for temperature up to about 980° C.
Claims17
An austenitic stainless steel alloy, comprising, 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 0.5% nitrogen;
- and
- a balance of iron, with the proviso that molybdenum, niobium, and tungsten are excluded from the alloy.
An turbocharger turbine housing comprising:
- an austenitic stainless steel alloy, wherein the austenitic stainless steel alloy comprises, 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 0.5% nitrogen;
- and
- a balance of iron, with the proviso that molybdenum, niobium, 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:
- 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 0.5% nitrogen;
- and
- a balance of iron, with the proviso that molybdenum, niobium, and tungsten are excluded from the alloy.
Dependencies are inferred from the claim text.