Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Microstructure of Electron Beam Welded Cu / STS 304 Dissimilar Materials

전자빔 용접된 Cu / STS 304강의 미세조직에 관한 연구

  • Park, Kyoung-Tae (Dept. of Nano Material Engineering, Chungnam National University) ;
  • Kim, In-Ho (Dept. of Nano Material Engineering, Chungnam National University) ;
  • Baek, Jun-Ho (Dept. of Nano Material Engineering, Chungnam National University) ;
  • Chun, Byung-Sun (Dept. of Nano Material Engineering, Chungnam National University)
  • 박경태 (충남대학교 나노소재공학부) ;
  • 김인호 (충남대학교 나노소재공학부) ;
  • 백준호 (충남대학교 나노소재공학부) ;
  • 천병선 (충남대학교 나노소재공학부)
  • Received : 2009.11.05
  • Accepted : 2010.02.10
  • Published : 2010.04.30
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Abstract

According to the research report for the recent a few years, the dissimilar welding of Cu and STS 304 alloy have been presented that a weldability is very poor. This article present a study on Lap joint by Electron beam welding dissimilar materials. The weld metals was constituted between pure copper and STS 304 steel. The experiment was performed with 125mA welding current, 520mA focusing current. The Vacuum condition of chamber is 5${\times}$10-5torr and welding speed is 300mm/min. Showing the bead shape of weld metal, the thickness of the stainless 304 using as the protect materials is 3mm and the thickness of a copper is 15mm. The analysis about the microstructure were carried out in which it was observed with SEM. The results showed that complex heterogeneous fusion zone microstructure characterized both by rapid cooling and mixing of the molten metal, however the liquation crack was formated in the fusion line.

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References

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