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Park, Hyung Wook
Multiscale Hybrid Manufacturing Lab.
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Surface modifications to grooved SM45C mold steel plates using large-electron-beam polishing

Author(s)
Kim, Dong MinPark, EunjuPark, Hyung Wook
Issued Date
2012-05
DOI
10.1177/0954405411431026
URI
https://scholarworks.unist.ac.kr/handle/201301/2894
Fulltext
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84871940528
Citation
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE, v.226, no.B5, pp.950 - 954
Abstract
In this study, a recently developed electron-beam polishing process was adopted to improve the surface quality of grooved SM45C mold steel plates. A large electron beam with a maximum diameter of 60mm was used to instantly melt and evaporate the metal surface in a few microseconds to observe its effect on surface hardness, surface roughness, water repellency, and microstructure variation. The effects of the groove depth and width on the plate were also experimentally observed. The surface polished by the electron beam became smoother, but as the groove depth increased, the effect of the large-electron-beam polishing decreased. Although the surface hardness dropped by approximately 20% on the re-solidified layer, the contact angle increased after the electron-beam irradiation. The microstructure variation on the polished surface was also examined.
Publisher
SAGE PUBLICATIONS LTD
ISSN
0954-4054
Keyword (Author)
Large-electronbeam polishinggrooved SM45C mold steelirradiationsurface roughnesssurface hardness

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