K980A空气压缩机曲轴断裂失效分析  

Fracture Analysis for K980A Air Compressor Crankshaft

作　　者：周栋[1] 糜亮[1] 王瑀[1] 杜春海[1] 丁毅[2] 

机构地区：[1]江苏省特种设备安全监督检验研究院扬州分院,扬州225000 [2]南京工业大学,南京210009

出　　处：《中国特种设备安全》2015年第6期67-71,75,共6页China Special Equipment Safety

摘　　要：针对K980A空气压缩机在服役时发生曲轴断裂进行了失效分析。在宏观断口分析的基础上,采用金相显微组织分析、机械性能测试、表面形貌分析(SEM)以及材质分析(EDS)等方法分析了压缩机曲轴断裂失效的根本原因。结果表明,K980A曲轴断裂属于高周疲劳断裂,曲轴外表面硬度偏低是疲劳裂纹形成的原因;铸造缺陷以及硅、硫、磷杂质含量偏高,增加了曲轴的脆性,促进了裂纹的扩展。Failure analysis of the K980A air compressor crankshaft when serving was conducted. On the basis of macro-fracture analysis, the fracture cause of crank shaft of air compressor was analyzed by metallographic analysis, mechanical properties, SEM analysis, EDS analysis and other methods. The results showed that the K980A crankshaft fracture belonged to the high cycle fatigue fracture. The low hardness of the surface was the cause that fatigue crack formed. Casting defects and high content of silicon, sulfur, phosphorus increased the brittleness of the crankshaft and promoted the growth of the crack.

关 键 词：失效分析 空气压缩机 曲轴 断裂 

分 类 号：TG146.21[一般工业技术—材料科学与工程]