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Investigation on welding parameters and bonding characteristics of underwater wet friction taper plug welding for pipeline steel
- Source :
- The International Journal of Advanced Manufacturing Technology. 81:851-861
- Publication Year :
- 2015
- Publisher :
- Springer Science and Business Media LLC, 2015.
-
Abstract
- The Q235 and X65 steel tapered plugs were used to perform friction taper plug welding (FTPW) on X65 pipeline steel in underwater wet condition. The work concentrates on defect formation, torque variation, energy input during FTPW, and also the weld microstructures and hardness. Energy input is proportional to torque-time integration under constant rotating speed and is critical to realize metallurgical bonding between the hole and plug. Increasing burn-off can prolong welding time, thus enhancing energy input, so that defect can be eliminated. Using X65 plug can produce defect-free welds since the energy input is adequate. However, when Q235 plug is used, lack of bonding is commonly found as a kind of root defect in friction taper plug (FTP) weld owing to the insufficient energy input. The weld zone microstructure mainly consists of upper bainite in X65 plug weld, but Widmanstatten structure in Q235 weld. In heat-affected zone, the microstructure is found as upper bainite in both X65 and Q235 plug welds.
- Subjects :
- Heat-affected zone
Materials science
Bainite
Mechanical Engineering
Metallurgy
Laser beam welding
Welding
Electric resistance welding
Microstructure
Industrial and Manufacturing Engineering
Computer Science Applications
law.invention
Control and Systems Engineering
law
Friction welding
Composite material
Spark plug
Software
Subjects
Details
- ISSN :
- 14333015 and 02683768
- Volume :
- 81
- Database :
- OpenAIRE
- Journal :
- The International Journal of Advanced Manufacturing Technology
- Accession number :
- edsair.doi...........abe58390b555943291518e24b4a58559