摘要
采用透射电镜和扫描电镜研究TP347HFG钢在高温应力作用下的析出相。结果表明:析出相为面心立方结构的M_(23)C_6和Nb C碳化物,前者分布于晶内和晶界,后者弥散分布于晶内;随着试验时间的延长,M_(23)C_6数量明显增多,但尺寸无明显变化;TP347HFG钢中的一次碳化物数量多,在长时高温应力作用下,碳化物易于在晶界及其附近聚集,促进裂纹的形成。
The precipitated phase of TP347HFG steel under high temperature stress was studied by transmission electron microscopy and scanning electron microscopy.The results show that the precipitated phases were M23C6 and NbC carbides with face-centered cubic structure.The former was distributed in the grain and grain boundary,and the latter was dispersed in the grain.With the extension of test time,the number of M23C6 increased significantly,but the size did not change significantly.There were many primary carbides in TP347HFG steel.Under the action of long-term high temperature stress,carbides were easy to accumulate at grain boundaries and their vicinity,which promoted the formation of cracks.
作者
王光乐
郭岩
熊宗群
陈卓婷
WANG Guangle;GUO Yan;XIONG Zongqun;CHEN Zhuoting(Huadian Electric Power Research Institute Co.,Ltd.,Hangzhou 310030,China)
出处
《理化检验（物理分册）》
CAS
2024年第12期41-44,共4页
Physical Testing and Chemical Analysis(Part A:Physical Testing)
关键词
TP347HFG钢
高温应力
析出相
组织
碳化物
TP347HFG steel
high temperature stress
precipitated phase
organization
carbide
