【作者】 李东明； 方园园； 赵杰；

【Author】 LiDongming Fang Yuanyuan ZhaoJie ( School of Materials Science and Engineering,Dalian University of Technology,Dalian)

【机构】 大连理工大学材料学院；

【摘要】 本文利用Z参数探讨了T91/P91钢(9Cr-1Mo-V-Nb)在不用温度和应力下高温持久性能数据的统计分布规律,实现了对该钢种持久寿命的可靠性预测。结果表明:形状、热处理工艺等不同的T91/P91钢,它们的高温持久性能实验数据却交替重叠地分布在以在以Larson-Miller主曲线为中心的狭带中。表征T91/P91钢持久性能数据分散性的Z参数服从正态分布。利用Z爹数法对材料的高温持久性能进行一定可靠度下的预测,预测结果与NRIM及ECCC公开的实验数据均符合良好。更多还原

【Abstract】 This paper describes a statistical analysis for creep rupture data of T91/P91 (9Cr1MoVNb)steel by using Z-parameter method.The results indicate that the creep rupture data based on Larson-Miller parameter distribute in a narrow band although the T91/P91 steels have different shape and different heat treatment processes.The distribution of Z-parameter,which is used to represent the dispersion of the creep rupture data,is supported by normal distribution. Reliability prediction of creep rupture life is performed according to Z-parameter method,and the results exhibit a good agreement with the experimental data which come from the NRIM and ECCC.更多还原