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通过系列温度-时间组合的实验室模拟实验和对大量数据的汇总、分析,证明Larson-Miller(P)参数可以合理描述12Cr1MoV、15CrMo等主蒸汽管道材料的多种老化行为.结果表明,随着P值的增大,热管材料基体中的合金元素贫化加剧,球化程度逐渐升高,且力学性能显著下降,显示出这两种主蒸汽管道材料的组织和力学性能退化与Larson-Miller参数之间良好的对应关系.
A series of temperature-time combined laboratory simulation experiments and a large amount of data are summarized and analyzed to prove that the Larson-Miller (P) parameters can reasonably describe the various aging behaviors of main steam pipe materials such as 12Cr1MoV and 15CrMo. The results show that with the As the P value increases, the alloying element depletion aggravates, the spheroidization gradually increases, and the mechanical properties decrease remarkably, which shows that the microstructure and mechanical properties of the two main steam pipe materials are degraded with Larson-Miller parameters Good correspondence between.