CAJ | 학술논문

为探索金属磁记忆现象的物理本质，深入研究车桥桥壳损伤的磁记忆无损检测方法，首先对标准试件进行测试，然后对某系列新桥壳进行疲劳试验，得出桥壳危险区域不同位置、不同加载次数下磁记忆信号法向分量及其梯度值K的变化，并用X射线检测残余应力与磁记忆检测结果进行对比；再以疲劳试验为基础，针对退役驱动桥壳进行变形量测定及对其危险区域进行磁记忆检测，确定桥壳变形量与磁记忆信号间的关系。研究表明：施加载荷前桥壳表面的初始磁状态不同，施加载荷后磁记忆信号呈现规律性的变化；随着循环次数的增加，梯度K值峰值增大；利用磁记忆检测与X射线复合检测的方法能较好的判断出构件缺陷；桥壳的变形量和磁记忆信号梯度K值以及加载的循环次数之间有良好的对应关系，可以为驱动桥壳再制造检测提供依据。
위탐색금속자기억현상적물리본질，심입연구차교교각손상적자기억무손검측방법，수선대표준시건진행측시，연후대모계렬신교각진행피로시험，득출교각위험구역불동위치、불동가재차수하자기억신호법향분량급기제도치K적변화，병용X사선검측잔여응력여자기억검측결과진행대비；재이피로시험위기출，침대퇴역구동교각진행변형량측정급대기위험구역진행자기억검측，학정교각변형량여자기억신호간적관계。연구표명：시가재하전교각표면적초시자상태불동，시가재하후자기억신호정현규률성적변화；수착순배차수적증가，제도K치봉치증대；이용자기억검측여X사선복합검측적방법능교호적판단출구건결함；교각적변형량화자기억신호제도K치이급가재적순배차수지간유량호적대응관계，가이위구동교각재제조검측제공의거。
In order to explore the physical mechanism of metal magnetic memory phenomenon , the magnetic memory non-destructive testing of driving axle housing is presented .The standard specimens are tested , and fatigue tests for new axle housing are carried out .The changing of magnetic memory signal and its gradient K along with different location of danger zone of the axle housing and loading cycles are investigated , and the re-sult is compared with the X-ray detection of residual stress .Based on the fatigue test , the deformation of axle housing and magnetic memory signal on the dangerous area is detected , and the relationship between the de-formation and magnetic memory signals is established .It shows that the initial state of surface magnetic of axle housing is messy , and the magnetic memory signal turns regular after loading .With the increase of loading cy-cles, the peak of gradient K value increases.Meanwhile, the compound magnetic memory testing and X-ray detection method can better determine the defect in components .The deformation of axle housing is connected with both the gradient K of magnetic memory signal and loading cycles .The research can provide a basis for remanufacturing testing for drive axle housing .