摘要
对两个电厂锅炉的T91钢制高温过热器和中温再热器管运行后微观组织的老化进行了试验研究。结果表明:光学显微镜下,难以观察到材料微观组织的老化特征;在透射电镜下,可明显观察到材料微观组织老化的精细结构;运行时间短的中温再热器管的微观组织老化较运行时间长的高温过热器管严重。
A test study has been carried out for the microstructure aging of high-temperature surperheater and medium -temperature reheater tubes made from T91 steel for two utility boilers. Results show that the characteristics of microsturcture aging of the materials are difficult to be observed under an optical microscope; but the fine structure of microstructure aging can be obviously observed under a transmission electron microscope(TEM). The microstructure aging of medium-temperature reheater tubes during short-term operation is more serious than that of high-temperature superheater tubes during long-term operation.
出处
《热力发电》
CAS
北大核心
2006年第4期54-58,共5页
Thermal Power Generation
关键词
T91钢
高温过热器管
中温再热器管
微观组织老化
寿命评估
T91 steel
boiler tubes
high-temperatue superheater tubes
medium-temperature reheater tubes
microstructure aging
