理化检验-物理分册2024，Vol.60Issue(2)：21-23,27,4.DOI:10.11973/lhjy-wl202402006
发动机支架断裂原因及改进措施
Causes of engine bracket fracture and improvement measures
冀鹏 1陈世荣1
作者信息
- 1. 浙江零跑科技股份有限公司, 杭州 310000
- 折叠
摘要
Abstract
The fracture phenomenon of an engine bracket was analyzed by macroscopic observation,scanning electron microscope analysis,chemical composition analysis,metallographic examination and other methods.The results show that the content of C and Si elements in the material was close to the lower limit of the technical requirements,and the wall thickness of the casting was thin,so that the matrix graphite of the casting was E-type,which did not meet the technical requirements of the product,resulting in the fracture of the engine bracket under alternating load.It was recommended to add silicon carbide to the material to increase the content of C and Si elements.After the test,the graphite morphology of the casting was A-type,the length grade was 4,and the matrix structure was pearlite.The rest of the performance indicators met the design requirements.关键词
HT250灰铸铁/裂纹/石墨形态/硅碳比Key words
HT250 gray cast iron/crack/graphite morphology/silicon carbon ratio分类
矿业与冶金引用本文复制引用
冀鹏,陈世荣..发动机支架断裂原因及改进措施[J].理化检验-物理分册,2024,60(2):21-23,27,4.
