不锈钢管路焊缝连接疲劳性能试验研究  

Expermental Study on Fatigue Performance of Welded Joint of Stainless Steel Pipe Line

作　　者：庞晓丽 李浩 刘贝贝 余善海 杨白鸽 徐钰 PANG Xiao-li;LI Hao;LIU Bei-bei;YU Shan-hai;YANG Bai-ge;XU Yu(Henan Aercospace Hydraulic and Pneumatic Technology Co.,Ltd.,Zhengzhou 450016,China)

机构地区：[1]河南航天液压气动技术有限公司,河南郑州450016

出　　处：《液压气动与密封》2023年第4期78-82,共5页Hydraulics Pneumatics & Seals

摘　　要：通过高周疲劳试验机,采用升降疲劳试验法,开展了室温及高温(150℃)环境下,UNS32100不锈钢管路焊缝接头疲劳性能的试验测试。得到了应力比R在-1、0.1、0.5等不同载荷条件下焊缝接头的疲劳寿命极限。基于非线性模型及最小二乘法,推导得到了不同载荷条件下的S-N曲线方程,并同步给出了其相对应的S-N曲线图。最后,进行了焊缝疲劳断口形貌的观察和分析。对UNS32100不锈钢管焊缝接头连接疲劳性能的试验研究及获得的疲劳寿命曲线,为航空发动机外部管路的疲劳设计与分析提供了数据支撑,具有重要的工程实际意义。Through the high cycle fatigue testing machine and the lifting fatigue test method,the fatigue properties of UNS32100 welded steel pipe joints at room temperature and high temperature(150℃)were tested.The fatigue life limits of welded joints with stress ratior under different loading conditions such as-1,0.1 and 0.5 are obtained.Based on the nonlinear model and the least square method,the S-N curve equations under different load conditions are derived,and the corresponding S-N cures arc given synchronously.Finally,the fatigue fracture morphology of weld was observed and analyzed.In this paper,experimental study on fatigue performance of UNS32100 welded steel pipeweld joint and the obtained fatigue life curve provided data support for the fatigue design and analysis of aercengine external pipeline,which has important engineering practical.

关 键 词：不锈钢管 氩弧焊 对接焊缝 升降法 疲劳性能试验 S-N曲线 

分 类 号：TH137[机械工程—机械制造及自动化]