通过比较岛型和类珠光体型铁素体加马氏体双相钢的显微组织和拉伸性能,并用JaoultCrussard法对有关的应力-应变曲线进行分析的结果表明:类珠光体型双相钢具有较高的加工硬化率和良好的强塑性组合。提出了用铁素作区域的平均宽度λF作为参数来估算双相钢强度的计算公式。分别从显微组织,强度规律及加工硬化行为等方面探讨了类珠光体型双相钢具有优良的拉伸性能的原因。 By comparing the microstructure and tensile properties of island and pearlite-like ferritic and martensitic dual-phase steels and analyzing the stress-strain curves by the Jaoult-Crussard method, the pearlite-like dual-phase steels have Higher work hardening rate and a good combination of strong plasticity. The formula for estimating the strength of duplex steel with ferrite as the average width of the region λF is proposed. The reasons for the excellent tensile properties of pearlitic dual phase steels were discussed respectively from the aspects of microstructure, strength and work hardening.