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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-421-2

International Heat Transfer Conference 15
August, 10-15, 2014, Kyoto, Japan

The Influence of Deposited Metal Material Parameters on the Heat Transfer Process and Fluid Dynamics in the Welding Pool

Get access (open in a dialog) DOI: 10.1615/IHTC15.cnd.008758
pages 1479-1490

Sinopsis

Heat transfer in the welding pool is an important effect on the mechanical properties of the weld. The influences of the magnetic permeability and surface tension gradient of the deposited metal on the welding pool dynamics and fusion-line geometry were analyzed. The numerical results reveal that the maximum variation rates of the depth and width of the welding pool are 20.71% and 16.67% respectively, and the range of the average and maximum speeds are 1.10–1.40 m/s and 0.86–1.32 m/s respectively with changes in the magnetic permeability. The variation rates of the depth and width of the welding pool are from -0.83% to 0.69% and from -2.31% to 5.34% respectively, and the range of the average and maximum speeds are 0.15–0.25 m/s and 0.38–0.76 m/s respectively with changes in the surface tension gradient. The novel method was proposed to predict the microstructure issue of the heat-affected zone (HAZ). The microstructure tissue of heat-affected zone (HAZ) was predicted by a combining the temperature field calculated using fluent and that obtained from the continuous cooling transformation curve of X80 steel. The experimental results were in good agreement with the obtained results. The errors of ferrite grain size and bainite proportion obtained with novel method are 4% and 8% respectively.