在连续退火模拟实验机上对冷轧双相钢进行了退火镀锌工艺的模拟实验,在实验室制备了冷轧热镀锌双相钢DP780,利用光学显微镜、SEM、TEM和EBSD技术对其显微组织进行了观察和分析,并对其力学性能进行了检测。实验结果表明:试样组织为铁素体加马氏体岛的双相组织,并有少量的残余奥氏体存在。该钢板具有良好的综合力学性能,达到了DP780级别双相钢的性能要求。 The cold-rolled dual-phase steel was annealed and galvanized in a continuous annealing simulator. The cold-rolled hot-dip galvanized duplex steel DP780 was prepared in the laboratory. The microstructure of the cold-rolled duplex steel DP780 was characterized by optical microscope, SEM, TEM and EBSD The microstructure was observed and analyzed, and its mechanical properties were tested. The experimental results show that the microstructure of the sample is a duplex structure of ferrite-martensite with a small amount of retained austenite. The steel plate has a good overall mechanical properties, to DP780 level dual-phase steel performance requirements.