高温加速试验与运行条件下10CrMo910钢组织变化的比较

Comparison of changes of structural morphologies of 10CrMo910 steel between accelerated high-temperature experiments and practical conditions

根据拉尔森-米列尔公式,对主蒸汽管道10CrMo910钢进行无应力和加应力条件下的高温加速试验,并与实际运行15×104h的10CrMo910钢进行显微组织与碳化物变化的分析比较,确定高温加速试验与实际运行是否存在差异.结果表明,加载应力所产生的显微组织变化和合金元素再分配比未加应力显著,但加速试验所产生的显微组织变化和合金元素再分配远没有实际运行的显著.

Based on the Larson-Miller formula, two accelerated high-temperature experiments with stress and without stress on the 10CrMo910 steel main stream pipe are carried out. To find out the differences between the experiments and the sample after 15×10^4 h running, the two results on both the microstructural morphologies and the carbides are analyzed and compared. The results show that the infection of the experiment with stress is more than the one without stress on the changes of microstructural morphologies, alloy element re-distribution and the carbides distribution; but, the infection of the practical condition is more than the accelerated high-temperature experiments on the above two aspects.