【摘要】 基于前置式超快冷(UFC)系统,在热轧生产线上开发减量化的双相钢(DP)生产工艺.结合大量实验室热轧实验,摸索出DP钢在超快冷方式下的冷却工艺.现场工业生产得到的DP钢抗拉强度在700MPa以上,屈强比为0.51～0.60,伸长率为22%～28%.实验室和生产线上试制结果表明,采用前置式UFC生产DP钢,可以少用或者不用(微)合金,降低成本且提高焊接性能.更多还原

【Abstract】 The production process of source-saving hot-rolled dual phase(DP) steel on HSM-line with early ultra fast cooling(UFC) was investigated.The cooling process of DP steels with early UFC was proposed after large number of experiments in the laboratory and in steel plant.The results obtained from laboratory and the plant showed that tensile strength is more than 700 MPa,yield ratio is 0.51～0.60 and elongation is 22%～28% for the DP steel produced in steel plant.The proposed production process of DP700 steel with early UFC is feasible with no or less microalloy/alloy elements,which decreases the production cost and improves the welding property.更多还原