输电铁塔主材低温失效分析  

Fault Analysis of Transmission Tower Main Material in Low Temperature

作　　者：常建伟[1] 李凤辉[1] 徐德录[1] 张东英[1] 于长海[1] 张磊[1] 李光[1] 

机构地区：[1]中国电力科学研究院,北京市100070

出　　处：《电力建设》2012年第3期86-88,共3页Electric Power Construction

摘　　要：对输电铁塔主材断裂进行了失效分析,通过承载力计算,化学成分、常温和低温力学性能试验以及对失效塔材断口、金相组织分析,探讨并明确失效原因,提出防范措施。结果表明:塔材为低温脆断,而冲孔形成的微裂纹是导致塔材低温失效的主要原因。Fracture of primary materials in transmission tower is analyzed, main conclusions of material failure are drawn and suggestions for improvement is put forward by analyzing bearing capacity, chemical properties, low-temperature tensile properties, fracture part of main material and microstructure of the main fracture material. The results show that main reason for material failure is low-temperature brittle fracture which is mainly caused by cracks in the process of punching.

关 键 词：输电铁塔 低温 脆性断裂 角钢 

分 类 号：TM753[电气工程—电力系统及自动化]