A cold-rolled and recrystallization-annealed flat steel product may include a ferritic microstructure, which possesses optimized formability and suitability for a wide variety of applications, including painting, for ...
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US2017306430(A1)
A cold-rolled and recrystallization-annealed flat steel product may include a ferritic microstructure, which possesses optimized formability and suitability for a wide variety of applications, including painting, for example. The flat steel product may include a steel comprising (in percent by weight): C: 0.0001％-0.003％, Si: 0.001％-0.025％, Mn: 0.05％-0.20％, P: 0.001％-0.015％, Al: 0.02％-0.055％, Ti: 0.01％-0.1％. The steel may further include at least one of Cr: 0.001％-0.05％, V: up to 0.005％, Mo: up to 0.015％, or N: 0.001％-0.004％, which may have the following mechanical properties: Rp0.2≦180 MPa, Rm≦340 MPa, A80≦40％, and n value ≦0.23. At least one surface may have an arithmetic mean roughness Ra of 0.8-1.6 μm and a peak count RPc of 75/cm. The present disclosure also concerns methods for producing flat steel products.
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