Batch-annealed dual-phase steel

Details Batch-annealed dual-phase steel Batch-annealed dual-phase steel

C - Chemistry, Metallurgy

21

D

148/31, 78/48

C21D 8/10 (2006.01) C21D 8/02 (2006.01) C22C 38/06 (2006.01) C22C 38/08 (2006.01)

Patent

CA 1193947

ABSTRACT OF THE DISCLOSURE Dual-phase steel, consisting essentially of a ferrite matrix containing islands of martensite, is produced by batch annealing of hot or cold rolled steel having carbon below 0.2% and manganese below 2% and at least critical contents of copper (0.4%) and nickel (0.6%), with heat to the alpha plus gamma region, followed by slow cooling. This procedure is effective and controllable, and yields a dual-phase steel product that has high tensile strength with excellent elongation properties and that develops good yield strength upon moderate deformation.

413016

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