旋翼轴磁痕显示原因分析  

Analysis of Magnetic Mark Indications on Rotor Shaft

作　　者：涂文斌[1,2,3,4] 薄锡金 刘德林[2,3,4] 宋凯[1] 陶春虎[1,2,3,4] 

机构地区：[1]无损检测技术教育部重点实验室(南昌航空大学),南昌330063 [2]北京航空材料研究院,北京100095 [3]航空材料检测与评价北京市重点实验室,北京100095 [4]中航工业失效分析中心,北京100095 [5]哈尔滨东安发动机(集团)有限公司,哈尔滨150066

出　　处：《失效分析与预防》2014年第6期375-378,共4页Failure Analysis and Prevention

摘　　要：旋翼轴机加工后进行磁粉检测,发现沿轴向存在多条磁痕显示。采用磁粉检测、低倍组织检查、金相组织观察及电子探针微区成分分析等方法,对磁痕显示原因进行了分析。结果表明:磁痕显示部位对应的亮条区为粗大的针状马氏体+残余奥氏体组织,Cr、Mo、Mn、Ni含量均高于正常区,因此旋翼轴的磁痕显示为沿轴向分布的奥氏体,其产生原因为成分偏析导致的马氏体转变点Ms降低。After machine processing,the rotor shaft was tested by magnetic particle,founding that the presence of a number of magnetic marks indications along the axie. In order to study the property and the produced reason of the magnetic scar indications,analysising to the reason of the magnetic mark by using magnetic particle testing,low magnification inspection,microstructure observation and electron probe micro-composition analysis,etc. The results showed that the microstructrure in the light bar area which the part of magnetic marks indications corresponding to is massive acicular martersite and remained austenite,the Cr,Mo,Mn,Ni alloying element contents were higher than normal area. So the magnetic mark indications of the rotor shaft along the axial distribution is the austenite,it was caused by the Ms reduction because of segregation of elements.

关 键 词：旋翼轴 磁痕显示 偏析 

分 类 号：TF76[冶金工程—钢铁冶金]