摘要
采用模拟试验制备了铜导线火烧熔痕、一次短路熔痕和二次短路熔痕,观察了这些熔痕的微观形貌并总结了其微观特征。结果表明:火烧熔痕断口基本没有孔洞;在高温作用前后,一次短路熔痕的微观特征相似,断口上存在均匀、细密的孔洞,呈卵形花样;二次短路熔痕断口上的孔洞大小不一,呈蜂窝状花样。
The fire melted mark,primary short circuited melted mark and secondary short circuited melted mark of the copper wire were prepared by simulation experiments.The micromorphology of these marks were observed and the microscopic characteristics was summarized.The results show that no holes existed at fracture of the fire melted mark.The microscopic characteristics of the primary short circuited melted mark before and after being treated at high temperature was the same;uniform and fine holes existed at the fracture and the fracture presented an oval pattern.The holes at fracture of the secondary short circuited melted mark varied in size and the fracture presented a honeycomb pattern.
作者
徐娜
时军波
李恩霞
陈立宗
刘珑
郭卫民
胡志文
XU Na;SHI Junbo;LI Enxia;CHEN Lizong;LIU Long;GUO Weimin;HU Zhiwen(Shandong Engineering Technology Center for Material Failure Analysis and Safety Assessment,Shandong Analysis and Test Center,Qilu University of Technology（Shandong Academy of Sciences）,Jinan 250014,China;Department of Physics and Materials Science,City University of Hong Kong,Hongkong 999077,China)
出处
《机械工程材料》
CAS
CSCD
北大核心
2018年第8期33-36,共4页
Materials For Mechanical Engineering
基金
山东省“泰山学者”海外特聘专家专项经费资助项目(tshw20120725)
山东省重点研发计划项目(2015GSF120002)
山东省自然科学基金三院联合基金资助项目(ZR2014YL0003)
中国应急分析测试平台科研项目(201316)
山东省科学院青年基金资助项目(2017QN001)
关键词
电气火灾
铜导线
火烧熔痕
短路熔痕
微观特征
electrical fire
copper wire
fire melted mark
short circuited melted mark
microscopic characteristics
