Method of making high strength duplex stainless steels

Details Method of making high strength duplex stainless steels Method of making high strength duplex stainless steels

1980-10-29

1982-10-12

Skiff, Peter K.

Metal treatment

Process of modifying or maintaining internal physical...

Chemical-heat removing or burning of metal

148 38, C21D 126, C21D 602

Patent

active

043537553

ABSTRACT:
The yield strength and tensile strength of a duplex stainless steel alloy body are substantially increased and its anisotropy is substantially reduced by heating it until it is completely ferritic or nearly so and then aging it to cause fine austenitic precipitates to form throughout the body.

REFERENCES:
patent: 3444011 (1969-05-01), Nagashima et al.
patent: 3551142 (1970-12-01), Decroix
patent: 4055448 (1977-10-01), Fujikura et al.
Southwick et al., "The Early Stages of the Decomposition of Ferrite to Austenite in a Stainless Steel," Phase Transformations, vol. 2, published by the Institution of Metallurgists, London, England, 1979, pp. II-74 to II-76.
Peckner et al., Handbook of Stainless Steels, "Structure and Composition of Wrought Microduplex Stainless Steels," McGraw-Hill Book Co., 1977, pp. 8-1 to 8-22.

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