High strength, high ductility low carbon steel

Details High strength, high ductility low carbon steel High strength, high ductility low carbon steel

C - Chemistry, Metallurgy

21

D

75/153, 148/50.1

C21D 1/78 (2006.01) C21D 1/18 (2006.01) C22C 38/02 (2006.01)

Patent

CA 1095748

ABSTRACT OF THE DISCLOSURE: A high strength, high ductility low carbon steel consisting essentially of iron, 0.05-0.15 wt% carbon, and 1-3 wt% silicon. Minor amounts of other constituents may be present. The steel is characterized by a duplex ferrite- martensite microstructure in a fibrous morphology. The micro- structure is developed by heat treatment consisting of initial austenitizing treatment followed by annealing in the (.alpha.+.gamma.) range with intermediate quenching. The present duplex steel has particular advantages for the automotive/pipeline industries.

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