| 摘要 |
The cold-rolled flat product made of steel, is claimed. The steel contains iron, unavoidable impurities, carbon, aluminum, niobium, titanium, phosphorus, sulfur, nitrogen, and optionally elements including manganese, rare earth metal, silicon, zirconium, vanadium, tungsten, molybdenum, chromium, cobalt, nickel, boron, copper and calcium. The product has deep drawability (r-value) of 1.3, and contains 0-0.1 vol.% of carbides. A ratio of a grain length in a rolling direction to a width in a transverse direction of a grain of the flat steel product is less than 1.5. The cold-rolled flat product made of steel, is claimed. The steel contains iron, unavoidable impurities, 0.05 wt.% of carbon, 6.8 wt.% of aluminum, 0.1-0.15 wt.% of niobium, 0.15-0.3 wt.% of titanium, less than 0.1 wt.% of phosphorus, less than 0.03 wt.% of sulfur, less than 0.1 wt.% of nitrogen, and optionally elements including 0-0.1 wt.% of manganese, 0-0.2 wt.% of rare earth metal, 0-2 wt.% of silicon, 0-1 wt.% of zirconium, 0-1 wt.% of vanadium, 0-1 wt.% of tungsten, 0-1 wt.% of molybdenum, 0-3 wt.% of chromium, 0-1 wt.% of cobalt, 0-2 wt.% of nickel, 0-0.1 wt.% of boron, 0-3 wt.% of copper and 0-0.015 wt.% of calcium. A ratio of titanium to niobium is 1.5-2.5. The product has deep drawability (r-value) of 1.3, and contains 0-0.1 vol.% of carbides. A ratio of a grain length in a rolling direction to a width in a transverse direction of a grain of the flat steel product is less than 1.5 An independent claim is included for a method of producing a cold-rolled flat product. |
