压力容器2026，Vol.43Issue(5)：11-19,9.DOI:10.3969/j.issn.1001-4837.2026.05.002
光热电站高温部件用347H不锈钢的疲劳性能与寿命预测方法研究
Study on fatigue performance and life prediction methods of 347H stainless steel for high-temperature components in concentrated solar power plants
摘要
Abstract
To address the problem that the existing local method neglects the stress gradient effect in high-stress regions,leading to insufficient accuracy in fatigue life prediction,structural material 347H stainless steel used for high-temperature components in concentrated solar power plants was taken as the research object.High-temperature fatigue tests were carried out on smooth specimens under strain control and on open-hole plate specimens under stress control,and their high-temperature fatigue behavior was analyzed.On this basis,combined with the Chaboche elastic-plastic constitutive model,the fatigue stress-strain response of the open-hole plate specimens was calculated,and the fatigue life prediction capabilities of the SWT model and the KBM model were comparatively studied based on the critical plane method.The results show that at the test temperature of 565℃,347H stainless steel exhibits cyclic hardening characteristics.The opening significantly weakens the fatigue strength of the high-temperature structure,with the fatigue life at a peak stress of 200 MPa being only 5.7%of that at a peak stress of 120 MPa.The prediction results of the SWT model all fall within the 2×error band,and its prediction capability is superior to that of the KBM model,while the prediction accuracy of the critical plane method is higher than that of the local method.This study can provide a reference for fatigue life assessment of high-temperature components in concentrated solar power plants.关键词
347H不锈钢/高温部件/疲劳/寿命预测/临界平面法Key words
347H stainless steel/high-temperature component/fatigue/life prediction/critical plane method分类
机械制造引用本文复制引用
陈昊,杜士磊,易千淇,陈冠蓉,孙雪菁,宫建国,黄毓晖,朱明亮,轩福贞..光热电站高温部件用347H不锈钢的疲劳性能与寿命预测方法研究[J].压力容器,2026,43(5):11-19,9.基金项目
国家重点研发计划课题(2023YFF0614903) （2023YFF0614903）
