新氢压缩机活塞杆断裂原因分析  

Fracture Analysis of Piston Rod for New Hydrogen Compressor

作　　者：姚懿容 蒋蓉蓉[1,2] 段北晨 管建敏 熊发浩[4] 李明 卢焕明 YAO Yi-rong;JIANG Rong-rong;DUAN Bei-chen;GUAN Jian-min;XIONG Fa-hao;LI Ming;LU Huan-ming(Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,Zhejiang China;Ningbo New Material Testing and Evaluation Center Co.Ltd.,Ningbo 315201,Zhejiang China;Key Laboratory of Special Equipment Safety Testing Technology of Zhejiang Province,Hangzhou 310020,China;Zhejiang Academy of Special Equipment Science,Hangzhou 310020,China)

机构地区：[1]中国科学院宁波材料技术与工程研究所,浙江宁波315201 [2]宁波新材料测试评价中心有限公司,浙江宁波315201 [3]浙江省特种设备安全检测技术研究重点实验室,浙江杭州310020 [4]浙江省特种设备科学研究院,浙江杭州310020

出　　处：《分析测试技术与仪器》2022年第3期267-272,共6页Analysis and Testing Technology and Instruments

基　　金：浙江省特种设备安全检测技术研究重点实验室开放基金项目(zjtjkf-202103)。

摘　　要：采用金相显微镜、扫描电子显微镜、能谱仪和火花直读光谱仪等测试仪器,对42CrMo新氢压缩机活塞杆断裂原因进行分析.结果表明,42CrMo钢的化学成分和金相组织均符合标准要求.失效活塞杆属于疲劳断裂,活塞杆钢材中存在大量几何尺寸大于10μm尖角形状聚集态氧化铝非金属夹杂物,在交变载荷作用下,这些夹杂物聚集处形成了应力集中,引起疲劳裂纹,是活塞杆断裂的主要原因.Optical microscope(OM), scanning electron microscope(SEM), energy dispersive spectrometer(EDS) and spark discharge atomic emission spectrometer were used to analyze the fracture reason of the piston rod for a new hydrogen compressor. The results manifested that the chemical composition and metallographic structure of 42CrMo steel accorded with the standards. The failure of piston rod was caused by the fracture fatigue. A large number of alumina inclusions, sharp and aggregated, with the size largerer than 10 μm, were present within the piston rod. Under the action of alternating loads, stress concentration was formed where these inclusions were gathered, and fatigue cracks were formed. This is the main reason for the fracture of the piston rod.

关 键 词：42CRMO钢 疲劳断裂 夹杂物 

分 类 号：O657[理学—分析化学]