铸造技术2017，Vol.38Issue(7)：1628-1630,3.DOI:10.16410/j.issn1000-8365.2017.07.027
35CrMo汽车凸轮轴的综合检测与断裂失效行为研究
Study on Comprehensive Inspection and Fracture Failure of Automobile Camshaft
刘晓光 1徐浩 2李博 1曹佳2
作者信息
- 1. 商丘工学院材料成型及控制工程系,河南商丘476000
- 2. 郑州大学材料科学与工程学院,河南郑州450001
- 折叠
摘要
Abstract
By means of metallographic microscope,scanning electron microscope and tensile mechanical property test,the microstructure and fracture morphology mechanical properties of the fracture camshaft of 35CrMo steel were examined,the reasons for the fracture of automobile bolts were inrestigated.The results show that the chemical composition,room temperature tensile mechanical properties and impact properties of the fracture camshaft meet the standard requirements.The structure of the fracture camshaftis is composed of tempered ferrite and ferrite.The fatigue crack about 3 mm exists before the last unstable fracture of the bolt,and the larger stress and the stress concentration of the fatigue crack are the reasons for the rapid failure of the bolt.The fatigue crack initiation of the camshaft is at the root of thread,the larger stress beyond the fatigue limit of the material and the processing defect on the surface of the thread are the causes of the fatigue cracking of the bolt.关键词
汽车凸轮轴/断裂/检测/失效分析Key words
automobile camshaft/fracture/detection/failure analysis分类
矿业与冶金引用本文复制引用
刘晓光,徐浩,李博,曹佳..35CrMo汽车凸轮轴的综合检测与断裂失效行为研究[J].铸造技术,2017,38(7):1628-1630,3.
