Journal
SCIENCE AND TECHNOLOGY OF WELDING AND JOINING
Volume 14, Issue 6, Pages 509-516Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/136217109X441182
Keywords
Numerical simulation; Oxygen; Welding parameter; Marangoni convection; Weld shape
Funding
- National Science Foundation of China [50874101]
Ask authors/readers for more resources
A numerical modelling of the welding arc and weld pool is established for moving argon shielded gas tungsten arc welding to systematically investigate the effect of the active element oxygen and the welding parameters on the Marangoni convection and the weld shape using FLUENT software. The different welding parameters will change the temperature distribution and gradient on the pool surface, and affect the strength of Marangoni convection and the weld shape. Under high oxygen content, the weld depth/width (D/W) ratio substantially depends on the welding parameters. A high welding speed or large electrode gap (arc length) will make the weld D/W ratio decrease. The weld D/W ratio initially increases and then remains constant around 0.5 with the increasing welding current. When the oxygen content is lower, the weld D/W ratio decreases with the increasing welding current. However, the weld D/W ratio is not sensitive to the welding speed or electrode gap. The predicted weld D/W ratio agrees well with the experimental results.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available