研究了热送热装工艺对X80管线钢力学性能和微观组织的影响。结果表明:热送热装板材屈服强度低于室温装炉板材,但韧性高于室温装炉板材;热送热装轧制板材中粒状贝氏体含量较多,而室温装炉轧制板材中板条贝氏体铁素体发达;具有细小针状铁素体是X80管线钢获得良好强度及韧性的前提。 The effect of heat transfer process on the mechanical properties and microstructure of X80 pipeline steel was studied. The results show that the yield strength of the hot-rolled hot-rolled plate is lower than that of the hot-rolled plate at room temperature, but the toughness is higher than that of the hot-rolled plate at room temperature. The content of granular bainite in the hot- Slab bainitic ferrite developed; with acicular ferrite is X80 pipeline steel to obtain good strength and toughness of the premise.