Method for homogenizing alloys susceptible to the formation of c

Details Method for homogenizing alloys susceptible to the formation of c Method for homogenizing alloys susceptible to the formation of c

1978-02-24

1980-09-09

Rutledge, L. Dewayne

Metal treatment

Compositions

Heat treating

148 127N, 148 131, 148162, C22C 1900, C22F 110

Patent

active

042216109

ABSTRACT:
A novel fabrication procedure prevents or eliminates the reprecipitation of segregated metal carbides such as stringers in Ti-modified Hastelloy N and stainless steels to provide a novel alloy having carbides uniformly dispersed throughout the matrix. The fabrication procedure is applicable to other alloys prone to the formation of carbide stringers. The process comprises first annealing the alloy at a temperature above the single phase temperature for sufficient time to completely dissolve carbides and then annealing the single phase alloy for an additional time to prevent the formation of carbide stringers upon subsequent aging or thermomechanical treatment.

REFERENCES:
patent: 3310440 (1967-03-01), Piearcey
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patent: 3563813 (1971-02-01), Webster
patent: 3645799 (1972-02-01), Gove et al.
patent: 3753790 (1973-08-01), Walker et al.
patent: 3798075 (1974-03-01), Bendel
patent: 3826689 (1974-07-01), Ohta et al.
Braski, D. N., Lietnaker, J. M., "Production of Homogeneous Titanium-Hastelloy N Alloys", ORNL/TM-5697, 2/1977.

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