OCTOBER 19-20, 2012 - YMCA University of Science & Technology

Proceedings of the National Conference on
Trends and Advances in Mechanical Engineering,
YMCA University of Science & Technology, Faridabad, Haryana, Oct 19-20, 2012
Figure 8
Figure 7 3D and contour plot for HAZ width (WS= 7.8 mm/s, Electrode Positive)
Figure 9 Figure 10 show that, the main effect of polarity is not influential but it has interaction with the wire
feed rates similar to HAZ width. One can notice that at low wire feed rates HAZ area is higher at electrode positive
under all similar variable combinations, while at high wire feed rates electrode negative polarity provides
larger HAZ area. Hardly any effect of wire feed rates is observed on HAZ area with electrode positive but wire
feed rates become more effective under electrode negative. In other words, electrode negative polarity with lower
wire feed rates should be favoured to achieve small HAZ area during submerged arc welding. Like HAZ width,
welding speed and open circuit voltage are most significant parameters which influence HAZ area.
Figure 8 Interaction effects of process parameters on HAZ are
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