High-efficiency finishing process for metal mold by large-area electron beam irradiation

Yoshiyuki Uno, Akira Okada, Kensuke Uemura, Purwadi Raharjo, Toshihiko Furukawa, Kosaku Karato

Research output: Contribution to journalArticlepeer-review

109 Citations (Scopus)


A new finishing process for metal molds by large-area electron beam (EB) irradiation is proposed in this study. In the large-area EB irradiation equipment used here, an EB with high-energy density is irradiated without focusing the beam, and so the EB with a maximum diameter of 60 mm can be used for melting or evaporating metal surface instantly. Experimental results show that the surface roughness decreases from 6 μmRz to less than 1 μmRz in just a few minutes under proper machining conditions. The corrosion resistance of metal mold surface also could be greatly improved by large-area EB irradiation. Furthermore, the surface roughness of tilting surface close to 90° could be well improved. Therefore, large-area EB irradiation method has a possibility to become a high-efficiency finishing process for metal molds.

Original languageEnglish
Pages (from-to)449-455
Number of pages7
JournalPrecision Engineering
Issue number4
Publication statusPublished - Oct 2005


  • Corrosion resistance
  • EDM
  • Electron beam
  • Metal mold
  • Surface finishing

ASJC Scopus subject areas

  • Engineering(all)


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