Studs for boilers and other high temperature applications

Details Studs for boilers and other high temperature applications Studs for boilers and other high temperature applications

1996-02-22

1997-04-08

Yee, Deborah

Alloys or metallic compositions

Ferrous

Four percent or more aluminum containing

420 79, 420 81, 148320, 148334, 148333, 219 98, 219 99, 260282, 110336, C22C 3806, B23K 1100, F23M 500, F22B 700

Patent

active

056184913

ABSTRACT:
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.

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