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US 5,618,491 AGranted
Studs for boilers and other high temperature applications
AssigneeTRW Inc.
InventorsMohan Kurup, Clark Champney
Life of this patent
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AssigneeTRW Inc.
InventorsMohan Kurup, Clark Champney
Estimating the term…
Disclosed is a stud for a boiler or other high temperature application, such as a furnace. The stud is made of an iron aluminum alloy which comprises about 81 to 91 wt. % iron, about 8 to 13 wt. % aluminum, about 0.01 to 0.3 wt. % carbon, and zero to about 3 wt. % of a refractory metal and/or zero to about 1.5 wt. % zirconium. The studs are welded to a surface of a component of the boiler or furnace by arc or resistance welding. The aluminum of the iron aluminum alloy imparts good oxidation and sulfidation resistance to the studs. The alloy also has a good electrical resistance which makes the alloy especially useful for arc or resistance welding. The aluminum content acts as a getter to eliminate gas porosity in the resulting welds. The present invention is particularly useful for making boiler heat exchange surfaces or refractory covered surfaces wherein the studs function as refractory anchors.
A stud for welding onto a surface exposed to high temperature, said stud comprising an iron aluminum alloy composition including:
A method of studding a furnace component surface comprising the steps of:
A stud for welding to a heat exchange surface having a stud configuration and an iron aluminum alloy composition comprising about 81% to 91% iron, about 8% to 13% aluminum, about 0.01% to 0.3% carbon, and zero to about 3% of a refractory metal and/or zero to about 1.5% zirconium.
A stud for welding onto a surface exposed to high temperature having an iron aluminum composition comprising:
A furnace component comprising:
A boiler comprising:
Dependencies are inferred from the claim text.