通过在线加热配分(HOP,Heating On-line Partitioning)技术获得贝氏体和马氏体/奥氏体(B+-M/A)双相组织,研究了这种(B+-M/A)双相管线钢的组织-性能特征.结果表明,在满足我国“西气东输二线”管道工程的强韧性要求前提下,这种(B+-M/A)双相管线钢还具有低的屈强比和大的均匀伸长率,表现出优良的大变形能力.多位向贝氏体基体、细小的M/A组元和弥散分布的碳、氮化合物析出是保证实验钢优良性能的组织特征.
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