In the narrow groove joints typically used for mechanized GMAW girth welding of high strength pipe, weldment properties are controlled by a large number of variables. The groove geometry, the bevel offset distance, the pass sequence and number of passes, the heat input per pass, the preheat and interpass temperatures, single vs. dual torch configuration, and the chemical composition of the consumable and the base pipe can all have an effect on the weldment properties. Determining the primary and secondary variables that control mechanical properties is a daunting task. Use of an integrated thermal-microstructural model has allowed virtual experiments to be conducted by varying the aforementioned welding variables to identify the primary and secondary drivers that control thermal behavior, microstructural evolution and ultimately weld and HAZ mechanical behavior. Outputs from this model have been used to correlate the essential process variables with weld hardness.
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2010 8th International Pipeline Conference
September 27–October 1, 2010
Calgary, Alberta, Canada
Conference Sponsors:
- International Petroleum Technology Institute and the Pipeline Division
ISBN:
978-0-7918-4421-2
PROCEEDINGS PAPER
A New Approach to Essential Welding Variables in Girth Welding of High Strength Pipe Steels
V. B. Rajan
,
V. B. Rajan
The Lincoln Electric Company, Cleveland, OH
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Y. Chen
,
Y. Chen
Center for Reliable Energy Systems, Dublin, OH
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M. Quintana
M. Quintana
The Lincoln Electric Company, Cleveland, OH
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V. B. Rajan
The Lincoln Electric Company, Cleveland, OH
Y. Chen
Center for Reliable Energy Systems, Dublin, OH
M. Quintana
The Lincoln Electric Company, Cleveland, OH
Paper No:
IPC2010-31334, pp. 547-554; 8 pages
Published Online:
April 4, 2011
Citation
Rajan, VB, Chen, Y, & Quintana, M. "A New Approach to Essential Welding Variables in Girth Welding of High Strength Pipe Steels." Proceedings of the 2010 8th International Pipeline Conference. 2010 8th International Pipeline Conference, Volume 2. Calgary, Alberta, Canada. September 27–October 1, 2010. pp. 547-554. ASME. https://doi.org/10.1115/IPC2010-31334
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