Effect of long-term service on the precipitates in P92 steel

作     者：Yan-ping Zeng Jin-dou Jia Wen-he Cai Shu-qing Dong Zhi-chun Wang 

作者机构：School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China North China Electric Power Research Institute Co.Ltd.Beijing 100045China 

出 版 物：《International Journal of Minerals,Metallurgy and Materials》 (矿物冶金与材料学报（英文版）)

年 卷 期：2018年第25卷第8期

页      面：913-921页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 

主　　题：precipitate P92 steel long-term service ultra supercritical unit 

摘      要：The precipitates in P92 steel after long-term service in an ultra-supercritical unit were investigated by field-emission scanning electron microscopy and transmission electron microscopy and were found to mainly consist of M23 C6 carbides,Laves phase,and MX *** Z-phase was observed.M23 C6 carbides and Laves phase were found not only on prior austenite grain boundaries,martensite lath boundaries,and subgrain boundaries but also in lath interiors,where two types of MX carbonitrides—Nb-rich and V-rich particles—were also observed but the winged complexes were hardly *** kind of precipitate within the martensite laths exhibited multifarious morphologies,suggesting that a morphological change of precipitates occurred during long-term *** M23 C6 carbides and Laves phase coarsened substantially,and the latter grew faster than the ***,MX carbonitrides exhibited a relatively low coarsening *** effect of the evolution of the precipitate phases on the creep rupture strength of P92 steel was discussed.