Manufacturing process for plate or forging of ferrite-austenite

Details Manufacturing process for plate or forging of ferrite-austenite Manufacturing process for plate or forging of ferrite-austenite

1984-08-31

1987-04-21

Rutledge, Dewayne

Metal treatment

Compositions

Heat treating

148 12EA, 148 121, C21D 713

Patent

active

046593977

ABSTRACT:
This invention relates to a manufacturing process for plate or forging (bar, stamp work or the like) of ferrite-austenite two-phase stainless steel, containing C at 0.03% or below, Si at 2.0% or below, Mn at 2.0% or below, Cr at 25 to 35%, Ni at 6 to 15%, N at 0.35% or below, and Fe and inevitable impurity for the remainder with or without adding B at 0.001 to 0.030% with the following nickel balance value specified at -3 to -9 and comprising an average crystal grain size at 0.015 mm or below from heating an ingot of the above mentioned ferrite-austenite two-phase stainless steel at 1,200.degree. C. or below and keeping a forging ratio by hot working at 5 or over.

REFERENCES:
patent: 4272305 (1981-06-01), Weingerl et al.
Allen, K. Dell, "Plastic Deformation of Metals, Metallurgy Theory and Practice, pp. 507-516.

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