高强螺栓断裂失效分析

成利 姜, 志清 申
2020 工程建设  
A company found that original state of bridge bolt was loose while it was used for fastening and it can be disassembled with an open spanner directly. After disassembly, the bolt broke when it was fastened with an open spanner, which specification is M30 × 160 10.9 and standard is ISO 4014:2011 (E). Now the failure analysis of broken bolt is carried out to find out failure reason of the bolt. Analysis items mainly include fracture analysis, chemical composition analysis, mechanical property
more » ... anical property analysis, hardness analysis, non-metallic inclusion analysis and metallographic structure analysis. Through failure analysis of the broken high strength bolt, it is found that cause of fracture is quenching crack.
doi:10.33142/ec.v3i2.1460 fatcat:3dvc4mdmznfutjmdnp5pwkrc6u