Trends in Welding Home      Event Overview      ASM Homepage
Back to "POSTER SESSION" Search
    Back to Main Search

Tuesday, June 3, 2008

Parametric modeling of Submerged Arc Welding Process

D. K. Shukla, Dr B R Ambedkar National Institute of Technology, Lalandhar, India; S. Pandey, Indian Institute of Technology Delhi, New Delhi, India

Submerged arc welding owing to high deposition rate, excellent surface appearance, invisible arc and lower welder skill requirement proves versatile in the fabrication of pressure vessels, marine vessels, pipelines, steel mill rollers, offshore structures, etc. This paper reports the effects of process parameters on the weld deposit area and microstructure. Bead on plate welds were made for the analysis purpose.

 

It was found that the weld deposit area was affected by welding input parameters like welding wire feed rate, welding speed, open circuit voltage, and contact-tube-to-work distance.

 

The effect of welding current on weld deposit area was studied independently by developing a model expressing welding current as a function of above mentioned welding parameters since welding current is a dependent response with constant voltage power sources. Models were also developed for weld bead geometry profiles and various shape relationships including percentage dilution. Finally the effect of welding parameters was studied on the microstructures.

 

Two-level half-fractional factorial design was used for establishing various relationships. The adequacy of the models was tested by analysis of variance technique and the significance of the coefficient was tested by student’s ‘t’ test.


Summary: The effect of welding current on weld deposit area was studied by developing a model expressing welding current as a function of direct welding parameters. Models were also developed for weld bead geometry profiles and various shape relationships. The effect of welding parameters on the microstructures was studied.