摘要
对一种新型高铬铁素体钢在温度为650℃和110,120,130 MPa三种应力下的蠕变性能进行了研究,并对该钢蠕变前后的显微组织进行了对比分析。结果表明:该钢具有良好抗蠕变性能,在650℃下,随着载荷从110 MPa增加到130 MPa,其蠕变断裂时间从4 500 h降低到3 600 h,蠕变速率从7.7×10-10s-1提高到1.1×10-9s-1,其蠕变抗力在相同试验条件下优于T91、T92和T122钢的;该钢的板条马氏体在颈缩变形区完全消失;在均匀和颈缩区内的M23C6型碳化物都明显粗化,同时形成了新的Fe2(W,Mo)金属间化合物相。
The creep properties of a new high chromium ferric steel under 110,120 and 130 MPa at 650 ℃ were investigated.Then the microstructure of the steel before and after creep was comparatively analyzed.The results show that the steel had good creep resistance.With increasing the loading from 110 MPa to 130 MPa at 650 ℃,the creep rupture time decreased from 4 500 h to 3 600 h,the creep rate increased from 7.7×10-10 s-1 to 1.1×10-9 s-1,whose creep resistance was better than that of the T91,T92 and T122 steels under the same test condition.The lath martensite of the steel disappeared completely in necking deformation area.The M23C6 carbides coarsened obviously in the uniform and necking deformation area.And a new Fe2（W,Mo） intermetallic phase formed.
出处
《机械工程材料》
CAS
CSCD
北大核心
2011年第2期54-57,共4页
Materials For Mechanical Engineering
