基于非线性超声技术的轴类零件疲劳损伤检测  

Fatigue Damage Detection of Shaft Parts Based on Nonlinear Ultrasonic Technology

作　　者：祖宁[1] 郭勇 杨飒 李雪峥 王恒[1] Zu Ning;Guo Yong;Yang Sa;Li Xuezheng;Wang Heng(Tianjin Special Equipment Inspection Institute,Key Laboratory of Digital Twin Generic Technology in Special Equipment for State Market Regulation,Tianjin 300192,China)

机构地区：[1]天津市特种设备监督检验技术研究院,国家市场监管重点实验室(特种设备数字孪生共性技术),天津300192

出　　处：《化工与医药工程》2024年第6期53-58,共6页Chemical and Pharmaceutical Engineering

基　　金：国家市场监督管理总局科技计划项目(2021MK 015);国家市场监督管理总局科技计划项目(2023MK016);国家市场监督管理总局技术保障专项项目(2023YJ31)。

摘　　要：本文采用非线性超声二次谐波法,研究了冷拔和热轧状态的45号钢轴类零件的疲劳损伤行为。实验利用RAM-5000 SNAP声学测试系统,针对不同疲劳次数下的试件进行了非线性超声检测。实验结果表明,不同疲劳次数下试件的超声非线性系数随疲劳次数的增加呈单调递增状态,且不同交货状态试件的非线性系数有所差别,热轧态试件的非线性系数明显高于冷拔态试件。通过采用该技术,能够检测出传统无损检测方法难以检出的轴类零件的疲劳微损伤。将实验所获得的超声非线性系数值与其疲劳寿命分数建立相关曲线,从而判断其所处的疲劳阶段,进而保障设备的安全使用。In this paper,the fatigue damage behavior of shaft parts of No.45 steel in cold-drawn and hot-rolled states is studied by using nonlinear ultrasonic second harmonic method.The RAM-5000 SNAP acoustic test system was used for nonlinear ultrasonic testing of specimens under different fatigue times.The experimental results show that the ultrasonic nonlinear coefficient of the specimens under different fatigue times increases monotonously with the increase of fatigue times,and the nonlinear coefficient of the specimens under different delivery conditions is different,and the nonlinear coefficient of the specimens under hot rolled condition is significantly higher than that under cold drawn condition.By using this technology,the fatigue microdamage of shaft parts that cannot be detected by traditional nondestructive testing methods can be detected.The ultrasonic nonlinear coefficient value obtained in the experiment is correlated with the fatigue life fraction,so as to judge the fatigue stage of the shaft parts,and thus ensure the safe use of the equipment.

关 键 词：非线性超声技术 轴类零件疲劳损伤 疲劳寿命 

分 类 号：TB559[理学—物理]