Technical Inspection of High Strength Bolts in Hydropower Plant: Physical and Chemical Inspection

2019 5th International Conference on Energy Materials and Environment Engineering

能源学;生态环境科学

Li, Wenbo^1 ; Liu, Lanlan^2 ; Wang, Jun^1 ; Xie, Yi^1 ; Chen, Junjun^1 ; Hu, Jiarui^1 ; Sun, Lipeng^1 ; Long, Yi^1

State Grid Hunan Electric Power Company Limited Research Institute, Changsha, Hunan

41007, China^1

State Grid Hunan Maintenance Company, Changsha, Hunan

41007, China^2

关键词: Bolt fractures;    Detection of chemicals;    High strength bolts;    Hydraulic power plant;    Hydropower plants;    Quality problems;    Stable operation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/295/4/042116/pdf
DOI  :  10.1088/1755-1315/295/4/042116

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

As an important connection part of metal equipment, bolt is widely used in hydraulic power plant. However, the bolt fracture of hydropower plant occurred occasionally, which seriously affected the stable operation of hydropower plant. Based on the analysis of the fracture bolt, the quality problems of the bolt were found: (1) the material is not qualified, (2) the mechanical properties of the bolts are not qualified. Because the misuse of the material and the wrong execution of the heat treatment, the actual strength of the bolts could not meet the nominal strength, leading to the fracture of the bolts during term of service. The detection of chemical composition and hardness testing can effectively monitor the testing quality of bolts, and prevent unqualified bolts into the installation and operation.