基于声发射技术的42Cr Mo钢疲劳损伤监测评价  

Fatigue Damage Monitoring and Evaluation of 42CrMo Steel Based on Acoustic Emission Technology

作　　者：袁志鹏 窦艳涛[1] 蒋欣 张洪伟[1] 陈景皓[1] YUAN Zhipeng;DOU Yantao;JIANG Xin;ZHANG Hongwei;CHEN Jinghao(School of Mechanical Engineering,Beijing Institute of Petrochemical Technology,Beijing 102617,China)

机构地区：[1]北京石油化工学院机械工程学院,北京102617

出　　处：《轴承》2025年第5期53-59,共7页Bearing

基　　金：国家级大学生创新创业计划项目(2019J00070)。

摘　　要：应用声发射技术对风电轴承常用42CrMo钢的疲劳损伤过程进行了监测,结果表明:声发射振铃计数及能量均可实现42CrMo钢疲劳裂纹近门槛扩展、稳态扩展和失稳扩展3个阶段的划分,且声发射振铃计数及能量曲线的转折点均比实测结果中进入疲劳裂纹稳态扩展及失稳扩展阶段的时刻更早,即采用声发射技术能实现疲劳裂纹扩展阶段的有效预警;通过试验分析分别建立了声发射振铃计数、能量与疲劳裂纹尺寸之间的关系模型,实现了对42CrMo钢疲劳裂纹扩展尺寸的量化预测。The fatigue damage process of 42CrMo steel commonly used in wind turbine bearings is monitored by acoustic emission technology.The results show that the acoustic emission ringing count and energy can divide the fatigue crack of 42CrMo steel into three stages:near threshold propagation,stable propagation and unstable propagation,and the turning point of acoustic emission ringing count and energy curve is earlier than that of stable propagation and unstable propagation stages of fatigue crack in measured results,indicating that the acoustic emission technology can realize effective early warning of fatigue crack propagation stages.The relationship model between acoustic emission ringing count,energy and fatigue crack size is established respectively by test analysis,and the quantitative prediction of fatigue crack propagation size of 42CrMo steel is realized.

关 键 词：滚动轴承 风电轴承 轴承钢 声发射技术 疲劳损伤 裂纹扩展 

分 类 号：TH133.33[机械工程—机械制造及自动化] TB302.5[一般工业技术—材料科学与工程]