Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Thermal Power Generation》 2000-06
Add to Favorite Get Latest Update

THE LIFE EXTRAPOLATION METHOD BASED ON CREEP CURVES FOR 12CrMoV HEAT RESISTANT STEEL

Shu Guogang et al  
This paper studied the creep curves of 12CrMoV heat resistant steel served as main steam pipes in power plant.By comparing constant-stress creep with constant-load creep,it was found that the method of θ Projection Concept could describe constant-stress creep successfully,but it was not applicable for the constant-load creep.Based on the constant-load creep curves of 12CrMoV steel,a modified θ method has been developed,which could describe both the constant-stress creep and constant-load creep successfully.Thereby,the extrapolations of creep curves can be made effectively with a lot of tested data of constant-load,Furthermore,on the basis of damage mechanics analysis and normalization treatment,a new concept of step-by-step extrapolation on the basis of extrapolation from creep curves was put forward to assess the residual life of high temperature components in power plants.The new step-by-step life extrapolation method gives a more accurate creep life estimation of certain components without considering uncertainties of classical extrapolation under conditions such as operation variations,microstructure alternation,and deference of test specimen from real components etc.creep
【CateGory Index】: TG142
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved