理化检验-物理分册Issue(3)：197-201,5.DOI:10.11973/lhjy-wl201603013
发动机气门弹簧断裂原因分析
Causes Analysis on Fracture of Valve Springs of Motors
摘要
Abstract
The physical and chemical testing and SEM analysis of the fracture were carried out on three typically fractured valve springs of motors.It was concluded that all the fracture mechanisms of the three valve springs were the fatigue fracture.The reasons causing the fracture were related to surface quality of valve springs. The fracture reason of No.1 valve spring was that non-metallic inclusions exsited in the surface.The fracture reason of No.2 valve spring was that corrosion pits exsited in the surface.The fracture reason of No.3 valve spring was that the folding defect exsited in the surface.Therefore,the key measures to improve the service life of valve springs were to control the quality of raw materials and avoid the surface defects of the valve springs.关键词
气门弹簧/疲劳断裂/表面质量/非金属夹杂物/锈蚀坑/折叠Key words
valve spring/fatigue fracture/surface quality/non-metallic inclusion/corrosion pit/folding分类
矿业与冶金引用本文复制引用
史霞,刘志莹,王道勇..发动机气门弹簧断裂原因分析[J].理化检验-物理分册,2016,(3):197-201,5.
