Stainless steel alloys, turbocharger turbine housings formed from the stainless steel alloys, and methods for manufacturing the same
AssigneeGarrett Transportation I 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.
Claims15
An turbocharger turbine housing comprising:
- an austenitic stainless steel alloy, wherein the austenitic stainless steel alloy consists of, by weight:
- 24% to 26% chromium;
- 3.5% to 6.5% nickel;
- 1% to 6% manganese;
- 0.5% to 2.5% silicon;
- 0.3% to 0.6% carbon;
- 0.2% to 0.5% nitrogen;
- up to 0.03% phosphorous;
- up to 0.03% sulfur;
- and
- a balance of iron and inevitable/unavoidable impurities.
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 consists of, by weight:
- 24% to 26% chromium;
- 3.5% to 6.5% nickel;
- 1% to 6% manganese;
- 0.5% to 2.5% silicon;
- 0.3% to 0.6% carbon;
- 0.2% to 0.5% nitrogen;
- up to 0.03% phosphorous;
- up to 0.03% sulfur;
- and
- a balance of iron and inevitable/unavoidable impurities.
Dependencies are inferred from the claim text.