Low density steel having good drawability

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United States of America Patent

PATENT NO 9765415
SERIAL NO

15374827

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Abstract

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A cold-rolled and annealed ferritic steel sheet is provided. The steel has a composition comprising, expressed by weight:

    0.001≦C≦0.15%;Mn≦1%;Si≦1.5%;7.5%≦AI≦10%;0.020%≦Ti≦0.5%;S≦0.050%; andP≦0.1%.A balance of the composition includes iron and inevitable impurities resulting from the smelting. The structure includes kappa (κ) precipitates and equiaxed ferrite, an average grain size dα of the equiaxed ferrite is less than 50 microns, and a linear fraction f of intergranular κ precipitates is less than 30%. The linear fraction f is defined by

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Patent Owner(s)

Patent OwnerAddress
ARCELORMITTAL FRANCE93200 SAINT DENIS

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bouaziz, Olivier Metz, FR 10 47
Drillet, Josée Rozerieulles, FR 4 19
Garat, Xavier Homecourt, FR 10 18
Perlade, Astrid Montigny les Metz, FR 35 69
Uriarte, Jean-Louis Metz, FR 2 10

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