45钢空气压缩机曲轴断裂原因分析  

Analysis on Fracture of 45 Steel Air Compressor Crankshaft

作　　者：黄飞[1] 朱兴江[1] 甘正斌[1] 彭文翔[1] 卢丹[1] 

机构地区：[1]国家钢铁及制品质量监督检验中心,安徽马鞍山243000

出　　处：《物理测试》2013年第3期43-46,共4页Physics Examination and Testing

摘　　要：某散装水泥罐车空气压缩机曲轴在运行一个月内发生断裂,采用化学成分分析、硬度测试、金相检验、扫描电镜微观断口分析及能谱分析方法对其断裂的原因进行了分析,结果表明,未按要求对曲轴进行热处理使材料的力学性能未达到设计使用要求,导致材料的疲劳强度降低,造成了空压机曲轴的早期断裂。Fracture of the crankshaft in air compressor of bulk cement tanker occurred within one month operation.The fractured crankshaft was investigated through chemical compositions analysis,hardness test,microstructure examination,macro-fracture analysis by scanning electron microscopy（SEM） and energy dispersive spectrometry（EDS）.The results show that required heat treatment are not performed,which resulted into the fracture,and thus the mechanical property of the material could not meet the design requirement.So fatigue strength of the shaft decreased,resulting in early fracture of crankshaft of air compressor.

关 键 词：曲轴 疲劳断裂 非金属夹杂物 正火 调质处理 

分 类 号：TH45[机械工程—机械制造及自动化]