High-temperature mechanical properties in 9Cr-0.5Mo-1.8W-VNb steel after long-term aging at 650℃
A series of post-aged tensile tests, scanning electron microscopy (SEM) examinations and transmission electron microscopy (TEM) observations were carried out to investigate the microstructurc evolution and high-temperature mechanical properties of P92 steel.Experimental results indicate that martcnsitic lath structure,M23C6 carbides as well as MX carbonitrides all exhibit a high stability during short-term aging exposure, whereas Laves phase grows rapidly in this period.After the long-term aging treatment, the recovery of martensitic lath structure occurs after an incubation period, which resulted from the continuous growth and coarsening of M23C6 and Laves phase.Based on the correlations between the microstructural evolution and the variations of high-temperature mechanical properties during long-term aging exposure, the degradation mechanism of P92 steel was discussed.
P92steel Aging Mechanical property
Xiaoxiang Weng Yong Jiang Jianming Gong Xiaofeng Guo Luyang Geng Jianqun Tang
School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing, Jiangsu 211816, China
国际会议
长沙
英文
235-240
2016-10-16（万方平台首次上网日期，不代表论文的发表时间）