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首页> 外国专利> MICRO-ALLOYED HIGH-STRENGTH MULTI-PHASE STEEL CONTAINING SILICON AND HAVING A MINIMUM TENSILE STRENGTH OF 750 MPA AND IMPROVED PROPERTIES AND METHOD FOR PRODUCING A STRIP FROM SAID STEEL

MICRO-ALLOYED HIGH-STRENGTH MULTI-PHASE STEEL CONTAINING SILICON AND HAVING A MINIMUM TENSILE STRENGTH OF 750 MPA AND IMPROVED PROPERTIES AND METHOD FOR PRODUCING A STRIP FROM SAID STEEL

机译：包含硅且最小拉伸强度为750 MPA的微合金高强度多相钢和改进的性能，以及由所述钢生产钢带的方法

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摘要

A high-strength multi-phase steel having minimum tensile strengths of 750 M:Pa and preferably having a dual-phase microstructure for a cold- or hot-rolled steel strip, in particular for lightweight vehicle construction is disclosed. The high-strength multi-phase steel has improved forming properties and a ratio of yield point to tensile strength of at most 73%. The high-strength multi-phase steel includes in mass %: C≥0.075 to ≤0.105; Si≥0.600 to ≤0.800; Mn≥1.000 to ≤0.700; Cr≥0.100 to ≤0.480; Al≥0.010 to ≤0.060; N 0.0020≤0.0120; S≤0.0030; Nb≥0.005 to ≤0.050; Ti≥0.0050 to ≤0.050; B≥0.0005 to ≤0.0040; Mo≤0.200; Cu≤0.040%; Ni≤0.040 % the remainder iron, including typical elements accompanying steel that are not mentioned above, which represent contamination resulting from smelting.
机译：公开了一种高强度多相钢，其具有最小的抗拉强度为750 M：Pa，并且优选地具有用于冷轧或热轧钢带，特别是用于轻型车辆构造的双相显微组织。高强度多相钢具有改善的成形性能，并且屈服点与抗拉强度的比率至多为73％。高强度多相钢的质量％为：C≥0.075〜≤0.105; Si≥0.600至≤0.800; Mn≥1.000至≤0.700; Cr≥0.100至≤0.480; Al≥0.010至≤0.060; N0.0020≤0.0120; S≤0.0030; Nb≥0.005至≤0.050; Ti≥0.0050至≤0.050; B≥0.0005至≤0.0040; Mo≤0.200;铜≤0.040％; Ni≤0.040％，其余铁，包括上述未提及的伴随钢的典型元素，其代表了由熔炼引起的污染。

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