An overlay weld repair procedure on a square plate 25.4 mm thick was simulated to compute the 3D transient temperature, microstructure, strain, stress, and displacement of the overlay weld repair procedure. The application for the overlay was the repair of cavitation erosion damage on a large Francis turbine used in a hydroelectric project. The overlay weld consisted of a pattern of squares. Each square was covered by 15 weld passes. Each weld pass was 100 mm long. The total length of weld in the six squares was 36 m. The welds in each square were oriented either front-to-back or left-to-right. The welding process was shielded metal arc. The analysis shows that alternating the welding direction in each square produces the least distortion. A delay time of 950 s between the end of one weld pass and the start of the next weld pass was imposed to meet the requirement of a maximum interpass temperature to .
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February 2010
Research Papers
Optimization of a Weld Overlay on a Plate Structure
Mahyar Asadi,
Mahyar Asadi
Carleton University
, Ottawa, ON K1S 5B6, Canada
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Jianguo Zhou,
Jianguo Zhou
Goldak Technologies Incorporated
, Ottawa, ON K1V 7C2, Canada
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Stanislav Tchernov,
Stanislav Tchernov
Goldak Technologies Incorporated
, Ottawa, ON K1V 7C2, Canada
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Dan Downey
Dan Downey
Goldak Technologies Incorporated
, Ottawa, ON K1V 7C2, Canada
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John Goldak
Mahyar Asadi
Carleton University
, Ottawa, ON K1S 5B6, Canada
Jianguo Zhou
Goldak Technologies Incorporated
, Ottawa, ON K1V 7C2, Canada
Stanislav Tchernov
Goldak Technologies Incorporated
, Ottawa, ON K1V 7C2, Canada
Dan Downey
Goldak Technologies Incorporated
, Ottawa, ON K1V 7C2, CanadaJ. Pressure Vessel Technol. Feb 2010, 132(1): 011402 (9 pages)
Published Online: December 9, 2009
Article history
Received:
January 29, 2009
Revised:
September 22, 2009
Online:
December 9, 2009
Published:
December 9, 2009
Citation
Goldak, J., Asadi, M., Zhou, J., Tchernov, S., and Downey, D. (December 9, 2009). "Optimization of a Weld Overlay on a Plate Structure." ASME. J. Pressure Vessel Technol. February 2010; 132(1): 011402. https://doi.org/10.1115/1.4000511
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