| 摘要 |
Steel comprises carbon (0.15-0.40 wt.%), manganese (1-2 wt.%), aluminum (0.2-1.6 wt.%), silicon (0-1.4 wt.%), phosphorus (0-0.10 wt.%), sulfur (0-0.03 wt.%), chromium (0-0.5 wt.%), molybdenum (0-1 wt.%), nitrogen (0-0.01 wt.%), nickel (0-2 wt.%), niobium (0.012-0.04 wt.%), titanium (0-0.40 wt.%), boron (0.0010-0.0050 wt.%), calcium (0-0.0050 wt.%), iron (remaining quantity) and inevitable impurities, where the sum of quantity of silicon and aluminum is 0.25-1.6 wt.%. Independent claims are included for: (1) a flat steel product for producing a steel component comprising at least a region containing the high-strength steel; (2) a steel component made of the flat steel product, having a structure in the region of high-strength steel consisting of martensite, austenite and up to 20% of ferrites; and (3) a method for producing the steel component comprising providing the flat steel product, heating the flat steel product at 780-950[deg] C, hot-deforming the flat steel product to steel component, and accelerated cooling the steel component so that the steel component obtained after cooling exhibits at least a structure in the region of high-strength steel consisting of martensite, austenite and up to 20% ferrite. |
