Fe-Ni-Cr-base superalloy, engine valve and knitted mesh supporte

Details Fe-Ni-Cr-base superalloy, engine valve and knitted mesh supporte Fe-Ni-Cr-base superalloy, engine valve and knitted mesh supporte

1996-03-28

1997-08-26

Zimmerman, John

Stock material or miscellaneous articles

All metal or with adjacent metals

Mass of only fibers

148327, 420 47, 420 53, 4205841, 420586, 4205861, C22C 3844

Patent

active

056609388

ABSTRACT:
An FE--Ni--Cr-base superalloy consists essentially of, by weight, up to 0.15% C, up to 1.0% Si, up to 3.0% Mn, 30 to 49% Ni, 10 to 18% Cr, 1.6 to 3.0% Al, one or more elements selected from Groups IVa and Va whose amount or total amount is 1.5 to 8.0%, the balance being Fe, optionally, minor amounts of other intentionally added elements, and unavoidable impurities. The optional other elements which can be intentionally added to or omitted from the alloy include Mo, W, Co, B, Mg, Ca, Re, Y and REM. The superalloy is suitable for forming engine valves, knitted mesh supporters for exhaust gas catalyzers and the like, and has excellent high-temperature strength and normal-temperature ductility after long-time heating, as well as sufficient oxidation resistance properties for these uses.

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