Open AccessTechnical Inspection of High Strength Bolts in Hydropower Plant: Physical and Chemical Inspection
Author(s) -
Wenbo Li,
Lanlan Liu,
Daming Wang,
Yi Xie,
Junjun Chen,
Jiarui Hu,
Liping Sun,
Yunqian Long
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/295/4/042116
Subject(s) - hydropower , rock bolt , fracture (geology) , power station , engineering , structural engineering , forensic engineering , geotechnical engineering , electrical engineering
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.