Selection of optimal welding condition for GTA pulse welding in root-pass of V-groove butt joint

Title
Selection of optimal welding condition for GTA pulse welding in root-pass of V-groove butt joint
Author(s)
김재웅윤석철[윤석철]
Keywords
OPTIMIZATION; PARAMETERS; ALLOY
Issue Date
201012
Publisher
KOREAN INST METALS MATERIALS
Citation
METALS AND MATERIALS INTERNATIONAL, v.16, no.6, pp.975 - 980
Abstract
In the manufacture of high-quality welds or pipeline, a full-penetration weld has to be made along the weld joint. Therefore, root-pass welding is very important, and its conditions have to be selected carefully. In this study, an experimental method for the selection of optimal welding conditions is proposed for gas tungsten arc (GTA) pulse welding in the root pass which is done along the V-grooved butt-weld joint. This method uses response surface analysis in which the width and height of back bead are chosen as quality variables of the weld. The overall desirability function, which is the combined desirability function for the two quality variables, is used as the objective function to obtain the optimal welding conditions. In our experiments, the target values of back bead width and height are 4 mm and zero, respectively, for a V-grooved butt-weld joint of a 7-mm-thick steel plate. The optimal welding conditions could determine the back bead profile (bead width and height) as 4.012 mm and 0.02 mm. From a series of welding tests, it was revealed that a uniform and full-penetration weld bead can be obtained by adopting the optimal welding conditions determined according to the proposed method.
URI
http://hdl.handle.net/YU.REPOSITORY/23234http://dx.doi.org/10.1007/s12540-010-1218-x
ISSN
1598-9623
Appears in Collections:
공과대학 > 기계공학부 > Articles
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