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Journal of KWJS 2010;28(2):47-53.
Published online May 13, 2010.
전자빔 용접된 Cu / STS 304강의 미세조직에 관한 연구
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Microstructure of Electron Beam Welded Cu / STS 304 Dissimilar Materials
KyoungTae Park, InHo Kim, JunHo Baek, ByungSun Chun
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 125㎃ welding current, 520㎃ focusing current. The Vacuum condition of chamber is 5x10-5torr and welding speed is 300㎜/min. Showing the bead shape of weld metal, the thickness of the stainless 304 using as the protect materials is 3㎜ and the thickness of a copper is 15㎜. 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.
Key Words: Electron beam welding, STS 304, Cu, Dissimilar, Materials, Microstructure


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