High strength, low carbon, dual phase steel rods and wires and process for making same

Patent · Wed Jan 01 00:00:00 EST 1986

OSTI ID:865990

Thomas, Gareth ^[1]; Nakagawa, Alvin H ^[2]

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1. Berkeley, CA
2. Campbell, CA

A high strength, high ductility, low carbon, dual phase steel wire, bar or rod and process for making the same is provided. The steel wire, bar or rod is produced by cold drawing to the desired diameter in a single multipass operation a low carbon steel composition characterized by a duplex microstructure consisting essentially of a strong second phase dispersed in a soft ferrite matrix with a microstructure and morphology having sufficient cold formability to allow reductions in cross-sectional area of up to about 99.9%. Tensile strengths of at least 120 ksi to over 400 ksi may be obtained.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Assignee: Regents of University of California (Berkeley, CA)
• Patent Number(s): US 4613385
• OSTI ID: 865990
• Country of Publication: United States
• Language: English

Related Subjects

strength
carbon
dual
phase
steel
rods
wires
process
ductility
wire
bar
rod
provided
produced
cold
drawing
desired
diameter
single
multipass
operation
composition
characterized
duplex
microstructure
consisting
essentially
strong
dispersed
soft
ferrite
matrix
morphology
sufficient
formability
allow
reductions
cross-sectional
99
tensile
strengths
120
ksi
400
obtained
steel composition
steel rod
consisting essentially
tensile strength
carbon steel
structure consisting
steel wire
composition characterized
cold drawing
dual phase
desired diameter
phase dispersed
phase steel
pass operation
structure consist
/148/