M.sub.7 C.sub.3 Reinforced iron base superalloys

Details M.sub.7 C.sub.3 Reinforced iron base superalloys M.sub.7 C.sub.3 Reinforced iron base superalloys

1981-11-06

1984-04-10

Skiff, Peter K.

Metal treatment

Compositions

Heat treating

75126A, 75126B, 148 38, C22C 3836, C22C 3838

Patent

active

044419392

ABSTRACT:
A carbide reinforced iron based superalloy material is described. The material consists of an austenitic matrix containing about 30 volume percent aligned M.sub.7 C.sub.3 phase fibers. Fiber alignment is produced by directional solidification. A nominal alloy composition (by weight) is 20% Cr, 10% Mn, 5% Al, 3.2% C. balance iron. The alloys are characterized by the absence of strategic elements, are east to process and have superior mechanical properties to the known prior art, low nickel, iron base superalloys.

REFERENCES:
patent: 3847679 (1974-11-01), Livingston
patent: 4305761 (1981-12-01), Bruch et al.

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