理化检验-物理分册2025，Vol.61Issue(7)：43-46,4.DOI:10.11973/lhjy-wl240098
膜盒组合件泄漏原因
Leakage reason of membrane box assemblies
郭河苗 1武帅 1顾天祥1
作者信息
- 1. 太原航空仪表有限公司,太原 030006
- 折叠
摘要
Abstract
The leakage of a membrane box assembly occurred during the pressure cycle test.The leakage causes of the membrane box assembly were analyzed by means of macroscopic observation,scanning electron microscope analysis,chemical composition analysis,metallographic examination and hardness test.The results show that the leakage of the membrane box assembly was caused by the cracking of the third diaphragm at the pressure end,and the cracking property was fatigue cracking.There were two scratch marks on the inner surface of the diaphragm,which caused local stress concentration and produce microcracks.Under the alternating stress of the pressure cycle test,the cracks continued to expand,and finally led to fatigue cracking of the diaphragm.There was a slight carburization phenomenon on the surface of the film,which accelerated the formation and expansion of cracks.关键词
膜盒组合件/泄漏/刮痕/表面增碳/疲劳开裂Key words
membrane box assembly/leakage/scratch/surface carbonization/fatigue cracking分类
矿业与冶金引用本文复制引用
郭河苗,武帅,顾天祥..膜盒组合件泄漏原因[J].理化检验-物理分册,2025,61(7):43-46,4.
