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Strengthen mechanism of 1000 MPa ultra-high strengthen cold-rolled dual phase steel which used in automobile

机译：1000MPa超高强化冷轧双相钢的强化机理，用于汽车

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lOOOMPa grade dual phase steels were developed based on the lower cost C-Mn-Si alloy system in laboratory. Microstructure of the steels was analyzed using SEM and transmission electron microscopy, while grain sizes and dislocation densities were determined by imagine tool and X-ray diffractometer. The inherent mechanism of high strengthening of dual phase steel was discussed and each strengthening factor was quantitatively calculated. The characteristics of micro-alloyed elements were illustrated respectively. The results showed that the strength of the theoretical calculation value 620.4MPa are very close to the measured values which was 596MPa, and the calculated yield strength increment produced by dislocation strengthening was 316 MPa, by grain refinement strengthening was 176 MPa and by solution strengthening was 128.4 MPa.
机译：基于实验室中的低成本C-MN-Si合金系统开发了宽松坡级双相钢。使用SEM和透射电子显微镜分析钢的微观结构，而晶粒尺寸和位错密度通过想象的工具和X射线衍射仪确定。讨论了双相钢高强度的固有机理，并定量计算了每个强化因子。分别示出了微合金元素的特征。结果表明，理论计算值620.4MPa的强度非常靠近596MPa的测量值，并且通过位错强化产生的计算屈服强度增量为316MPa，通过晶粒细化强化为176MPa，通过溶液加强溶液128.4 MPa。

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