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- Title
Optimization of welding current waveform for dissimilar material with DP590 and Al5052 by Delta-spot welding process.
- Authors
Kim, Ji-Sun; Kim, In-Ju; Kim, Young-Gon
- 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 2.355 μm to 1.09 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 layer.
- Subjects
AUTOMOTIVE fuel consumption; AUTOMOBILE emissions; SPOT welding; DISSIMILAR welding; AUTOMOBILE industry research; GOVERNMENT policy
- Publication
Journal of Mechanical Science & Technology, 2016, Vol 30, Issue 6, p2713
- ISSN
1738-494X
- Publication type
Article
- DOI
10.1007/s12206-016-0533-7