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Title of Journal: J Mech Sci Technol

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Abbravation: Journal of Mechanical Science and Technology

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Korean Society of Mechanical Engineers

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DOI

10.1007/bf03214831

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ISSN

1976-3824

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Optimization of welding current waveform for dissi

Authors: JiSun Kim InJu Kim YoungGon Kim
Publish Date: 2016/06/30
Volume: 30, Issue: 6, Pages: 2713-2721
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Abstract

The automotive industry has a target goal to improve fuel consumption due to restricted exhaust gas regulation For this reason the applicability of lightweight material Al alloys Mg alloys is also being expanded In this concept high strength steel DP590 and light alloy AL5052 are joined in the right place of the car body However it is difficult to join to steel and aluminum by conventional fusion welding Generally in respect to dissimilar metal joining by fusion welding intermetallic compound layer is formed at the joint interface hot cracking is generated In this study the effect of the current waveform on the mechanical characteristics and microstructure in Delta spot welding process of dissimilar metal was investigated As results Intermetallic compound IMC layer was reduced from 2355 μm to 109 μm by using Delta spot welding process also the welding current range improved by 50 in the delta spot welding higher than in the inverter resistance welding To conclude the delta spot welding process adopting the process tapes contributes to improving the welding quality for dissimilar metals Al5052 and DP590 due to a decrease in IMC layerJi Sun Kim is Junior Researcher in Department of Green Manufacturing process RD group of KITECH He received his MS degree from Mokpo National University He has interested in welding engineering dissimilar welding and optimizations of welding process

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