The invention relates to a dual-phase steel, a flat product produced therefrom, such as sheet steel, and to a method for the production thereof.
The invention relates to a dual-phase steel, to a flat product, and to a method for the production thereof, having strength of at least 950 MPa and good deformability and surface properties.
The inventive high resistance steel band or sheet which is made of a dual-phase steel exhibits good mechanical and technological properties, even after an annealing process including an over-aging treatment.
The metallic structure composition of the dual-phase steel pipe contains, in area ratio, 80-98% of ferrite and 2-20% in total of martensite, residual austenite or a mixed phase of martensite and residual austenite.
Here, the dual phase steel sheet has a dual phase structure that includes martensite and ferrite.
A steel composition and method from making a dual phase steel therefrom.
According to the present invention, a high-strength dual phase steel having excellent mechanical properties and surface quality can be manufactured.
The dual phase steel includes from, about 10% by volume to about 60% by volume of a first phase or constituent consisting essentially of fine-grained ferrite.
Disclosed are: a hot rolled dual phase steel sheet which has improved strength in a middle strain rate range; and a method for producing the hot rolled dual phase steel sheet.
According to an aspect of the present invention, dual phase steel has a tensile strength of 440 to 490 MPa, an elongation of 32%, and an r-value of 1.4 or more.
190 Flat-rolled product, dual phased steel, in coils, of specification GMW3399M-ST-S-CR590T/340Y-DP-UNCOATED-U, of a width from 1,361 mm to 1,500 mm inclusive, of a thickness of 1.1 mm or 1.2 mm
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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