Design of an induction system for induction assisted alternating current gas metal arc welding

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Recent work on the low heat input and high deposition rate welding process of pulsed alternating current gas metal arc welding (AC-GMAW) has paved the way for the implementation of a cost effective solution for thick plate welding. Intense plasma jets are achieved through a high current and high electrode negative (EN) ratio based pulsed AC-GMAW, which has high negative peak currents in the EN region of the pulse. A distinct arc behavior results in high arc center temperatures and finger penetration, whereas the weak surrounding arc results in a lack of fusion on the joint sides for material thicknesses above 8 mm. The controlled induction pre-heating of the joint sides up to the desired depth can help in overcoming this problem. Numerical simulations of the induction source were performed using temperature-dependent material properties to find the optimal induction heating parameters that will result in the desired penetration depth and temperature. Experiments were conducted on a scaled-down induction system to verify the simulation model. Reasonable results were observed, confirming the proposed methodology. A full-scale induction power system needs to be implemented together with the AC-GMAW process to experimentally verify the application of the induction-assisted alternating current gas metal arc welding (IA-ACGMAW) system to thick plate welding, especially to thermally treated high-strength steels. (C) 2015 Elsevier B.V. All rights reserved
Publisher
ELSEVIER SCIENCE SA
Issue Date
2016-05
Language
English
Article Type
Article
Keywords

FREQUENCY INDUCTION; NUMERICAL-ANALYSIS; HEAT-TREATMENT; STEEL PLATES

Citation

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, v.231, pp.162 - 170

ISSN
0924-0136
DOI
10.1016/j.jmatprotec.2015.12.015
URI
http://hdl.handle.net/10203/208632
Appears in Collection
ME-Journal Papers(저널논문)
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