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.
出处
《电力建设》
2012年第3期86-88,共3页
Electric Power Construction
关键词
输电铁塔
低温
脆性断裂
角钢
transmission tower
low-temperature
brittle fracture
angle steel
