| Abstract: |
Cast iron and cast steel has high carbon content and the graphite, the selection of welding method has an important item. Electron beam welding method, when focusing on the behavior of the graphite has a characteristic of high density energy, electron beam welding is suitable welding method. In the research on cast iron, Fe-Ni and Ni-Cr filler metals, each of a sheet 0.5mm thickness, was applied to cast iron of thickness of 18 mm. Under optimal welding processes, weld providing good electron beam welded properties by tensile test and COD test. Using a filler supply system, Ni-Cr of 1.2 mm diameter filler wire was applied to cast iron of thickness of 6 mm. Under the optimal process conditions and through post weld heat treatment, the brittle region around graphite in the heat affected zone was decreased. In the research on cast steel of thickness of 10 mm, the cast steel of about 1.2% carbon content and using materials obtained by adding about 2, 4, 6% Ni. Welding process, in addition to laser welding of the electron beam welding were also used. Welds of cast steel by electron beam welding, it became clear that low cracking tendency compared to laser welding. It was revealed by the addition of about 2% Ni in cast steel, it is possible to reduce the hardness of the fusion zone of the electron beam welding.
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