连续退火参数对980 MPa级冷轧双相钢组织和性能的影响

发布时间：2018-06-06 14:42

  本文选题：冷轧双相钢 + 连续退火　； 参考：《钢铁研究学报》2015年02期

【摘要】：采用带钢连续退火模拟试验机,研究了连续退火过程中加热速率、两相区保温温度和过时效温度对冷轧双相钢DP980组织和性能的影响规律。研究结果表明,适当提高加热速率有利于马氏体晶粒的细化和带状组织的改善,当加热速率达到45℃/s时可获得较高的强度和塑性。退火温度直接决定了硬质第二相的体积分数、分布和形貌,在800℃左右进行退火保温可以获得良好的综合性能,保温温度过低或过高都会导致强塑性匹配较差。随着过时效温度的降低,强度升高,伸长率下降,试验钢退火后加工硬化系数明显增大。
[Abstract]:The effects of heating rate, two-phase holding temperature and overaging temperature on the microstructure and properties of cold-rolled dual-phase steel DP980 during continuous annealing were studied by using a continuous annealing simulator. The results show that proper increase of heating rate is beneficial to the refinement of martensite grain and the improvement of banded structure. When heating rate reaches 45 鈩，

本文编号：1986990