排气门断裂失效分析  

Analysis on Fracture Failure of Exhaust Valve

作　　者：邵红红[1] 刘裕洋 余力 SHAO Honghong;LIU Yuyang;YU Li(Department of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China;Changchai Co.,Ltd.,Changzhou 213000,China;Winner Valve Group Co.,Ltd.,Postgraduate Workstation,Zhenjiang 212219,China)

机构地区：[1]江苏大学材料科学与工程学院,江苏镇江212013 [2]常柴股份有限公司,江苏常州213000 [3]维纳特气门有限公司研究生工作站,江苏镇江212219

出　　处：《热加工工艺》2018年第16期257-259,262,共4页Hot Working Technology

摘　　要：针对柴油机气门异常断裂的情况,借助扫描电镜、金相显微镜、能谱仪,进行了气门失效分析。结果表明,导致柴油机排气门异常断裂的主要原因是气门杆部存在坑状缺陷和混晶现象。Aiming at the situation of abnormal breakage of diesel engine exhaust valve, the failure analysis of the valve was carried by SEM, metallurgical microscope and EDS. The results show that the main cause for the abnormal fracture of diesel exhaust valve is due to the pit-shaped defects and mixed crystal phenomenon at the valve stem.

关 键 词：失效分析 4Cr10Si2 5CR21MN9NI4N 

分 类 号：TG111.91[金属学及工艺—物理冶金]