Creep Rupture Strength and Microstructure of Low C-10Cr-2Mo Heat-Resisting Steels with V and Nb
Creep Rupture Strength and Microstructure of Low C-10Cr-2Mo Heat-Resisting Steels with V and Nb
复制标题
含V、Nb低C-10Cr-2Mo耐热钢的蠕变断裂强度和显微组织
DOI：
10.1007/bf02643488
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发表时间：
1981
期刊：
影响因子：
--
通讯作者：
Y. Otoguro
中科院分区：
文献类型：
--
作者：
T. Fujita;K. Asakura;T. Sawada;T. Takamatsu;Y. Otoguro
0.05C-10 Cr-2 Mo-0.10V-0.05Nb（Cb）成分的新型铁素体耐热钢具有高的蠕变断裂强度和良好的塑性。本文研究了0.05C-10 Cr-2 Mo钢中V和Nb的最佳添加量及其对钢的持久强度和显微组织的影响。在600 ℃保温10，000 h时，V和Nb的最佳添加量分别为0.10%V和0.05%Nb，而在650 ℃保温10，000 h时，V和Nb的最佳添加量分别为0.18%V和0.05%Nb。含Nb钢在短时间方面优于其他等级，因为在初始回火阶段期间NbC沉淀延迟马氏体的恢复。然而，在长时间方面，含V钢具有较高的蠕变断裂强度。通过向钢中添加V，电子显微镜检查揭示了稳定的显微组织，在回火马氏体的软化的蠕变过程中的延迟，析出物的细小且均匀的分布，以及促进Fe 2 Mo的析出。
The new ferritic heat-resisting steels of 0.05C-10Cr-2Mo-0.10V-0.05Nb (Cb) composition with high creep rupture strength and good ductility have already been reported. The optimum amounts of V and Nb that can be added to the 0.05C-10Cr-2Mo steels and their effects on the creep rupture strength and microstructure of the steels have been studied in this experiment. The optimum amounts of V and Nb are about 0.10 pct V and 0.05 pct Nb at 600 °C for 10,000 h, but shift to 0.18 pct V and 0.05 pct Nb at 650 °C. Nb-bearing steels are preferred to other grades on the short-time side, because NbC precipitation during initial tempering stages delays recovery of martensite. On the long-time side, however, V-bearing steels have higher creep rupture strength. By adding V to the steels, electron microscopic examination reveals a stable microstructure, retardation during creep of the softening of tempered martensite, fine and uniform distribution of precipitates, and promotion of the precipitation of Fe2Mo.