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
Life of this patent
Estimating the term…
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.
Claims16
A ferritic stainless steel alloy, consisting of, by weight:
- 20% to 22% chromium;
- 0.5% to 1.0% manganese;
- 1.0% to 2.5% silicon;
- 1.5% to 2.2% tungsten;
- 1.3% to 1.8% niobium;
- 0.35% to 0.45% carbon;
- phosphorus at no more than 0.04%;
- sulfur at not more than 0.03%;
- and
- a balance of iron and unavoidable/inevitable impurities.
A turbocharger turbine housing comprising:
- a ferritic stainless steel alloy, wherein the ferritic stainless steel alloy consists of, by weight:
- 20% to 22% chromium;
- 0.5% to 1.0% manganese;
- 1.0% to 2.5% silicon;
- 1.5% to 2.2% tungsten;
- 1.3% to 1.8% niobium;
- 0.35% to 0.45% carbon;
- phosphorus at no more than 0.04%;
- sulfur at not more than 0.03%;
- and
- a balance of iron and unavoidable/inevitable impurities.
A method of fabricating a turbocharger turbine housing, the method comprising the step of:
- forming the turbocharger turbine housing from a ferritic stainless steel alloy, wherein the ferritic stainless steel alloy consists of, by weight:
- 20% to 22% chromium;
- 0.5% to 1.0% manganese;
- 1.0% to 2.5% silicon;
- 1.5% to 2.2% tungsten;
- 1.3% to 1.8% niobium;
- 0.35% to 0.45% carbon;
- phosphorus at no more than 0.04%;
- sulfur at not more than 0.03%;
- and
- a balance of iron and unavoidable/inevitable impurities.
Dependencies are inferred from the claim text.