High-temperature creep behaviour of 15CrMoG heat-resistant steel

2nd International Workshop on Materials Science and Mechanical Engineering

机械制造;材料科学

Pan, J.P.^1 ; Tu, S.H.^1 ; Zhu, X.W.^1 ; Hu, B.^2 ; Tan, L.J.^3

Jiaxing Special Equipment Inspection Institute, Jiaxing

314051, China^1

China Special Equipment Inspection and Research Institute, Beijing

100029, China^2

Shanghai Jiao Tong University, Shanghai

200240, China^3

关键词: CDM modeling;    Creep activation energy;    Creep behaviors;    Heat-resistant steel;    High temperature creep;    Model prediction;    Power plant efficiency;    Theoretical calculations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/504/1/012032/pdf
DOI  :  10.1088/1757-899X/504/1/012032

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Rapid increase in power plant efficiency requires development of heat-resistant steels for use in the boiler and piping systems. In this study, the creep activation energy of 15CrMoG steel was first investigated on the basis of the relationship between creep rate and temperature subjected to different stresses. Long-time creep tests at selected temperatures were performed for the 15CrMoG steel. Manson-Haferd model was utilized to predict the creep behavior of the steel, the results of which indicate that the experimental creep data agreed well with the data from the Manson-Haferd model prediction. Besides, the strain vs. creep time curves obtained from the creep tests were in good accordance with theoretical calculation based on the CDM model over a long creep time. Both Manson-Haferd model and CDM model are powerful tools in studying the high-temperature creep behaviour of the 15CrMoG steel.