基于修正Theta法的P92钢蠕变行为及寿命预测研究  

Research on Creep Behavior and Life Prediction of P92 Steel Based on the Modified Theta Projection Concept Method

作　　者：叶有俊[1] 王志成[1] 王一宁[1] 张鹏鹏 姜勇[2] YE You-jun;WANG Zhi-cheng;WANG Yi-ning;ZHANG Peng-peng;JIANG Yong(Special Equipment Safety Supervision Inspection Institute of Jiangsu Provence,Nanjing 210036,China;Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]江苏省特种设备安全监督检验研究院,江苏南京210036 [2]南京工业大学,江苏南京211816

出　　处：《石油化工设备》2020年第6期1-6,共6页Petro-Chemical Equipment

基　　金：国家重点研发计划资金资助(2018YFC0808800)。

摘　　要：P92钢系超超临界机组主蒸汽管道的重要用钢,由于长期处于高温、高压的服役环境中,不可避免会发生蠕变损伤,由此造成的事故逐年增加。因此,进行精确的寿命预测对于超超临界机组的使用和设计具有重要参考意义。通过650℃不同应力水平下P92钢的蠕变试验,分析了P92钢的蠕变曲线和蠕变变形,在此基础上利用修正的Theta法对蠕变数据进行分析,研究了P92钢的蠕变行为并对其寿命进行预测。研究结果表明,与传统Theta法相比,修正Theta法得到的结果与试验数据吻合度更高,误差更小。P92 steel as an important steel for main steam pipeline of ultra-supercritical units,inevitably suffers from creep damage due to long term service environment with high temperature and high pressure,which will lead to creep failure.Its accurate life prediction is of great reference significance for the use and design of ultra-supercritical units.The creep curve and deformation of P92 steel under different stress levels at 650℃were analyzed.On this basis,the modified Theta projection concept method was adopted to analyze the creep data,and the creep behavior of P92 steel was studied and its life was predicted.The research results show that compared with the traditional Theta projection concept method,the results obtained by the modified Theta projection concept method are more consistent with the experimental data with smaller errors.

关 键 词：P92钢 蠕变 曲线 寿命预测 修正Theta法 

分 类 号：TQ055.804[化学工程]