@inproceedings{4fd1aeb6f59b43a5aac2aa9fb6bae2ea,
title = "Electron beam surface modification of cobalt chrome molybdenum alloy formed by a laminate molding method",
abstract = "We used electron beam irradiation on a laminate molded Co-Cr-Mo bulk alloy to reduce the surface roughness and increase hardness. The accelerating voltage and beam current were 40 kV and 0.5-5.0 mA, respectively. Irradiation time for each dot was 0.1 ms and the distance between dots (dot pitch) was either 0.2 or 0.4 mm, which corresponded to a scanning speed of 200 or 400 mm/s, respectively. The roughness value, Ra, decreased to 0.3-0.45 ?m for a beam current of 1 mA and a dot pitch of 0.02 mm. The coarse grains present in the base alloy were refined to sizes of less than 1μm by rapid solidification. An increase in the Knoop hardness from 470 HK for the base metal to about 550 HK was achieved by this technique.",
keywords = "Cobalt-chrome-molybdenum alloy, Electron beam, Knoop hardness, Laminate molding, Rapid solidification, Surface roughness",
author = "Takekazu Nagae and Shigeki Kakiuchi and Kiyokazu Himi and Shogo Tomida and Emi Yamaguchi and Takashi Yoneda",
year = "2010",
doi = "10.4028/www.scientific.net/MSF.638-642.2121",
language = "英語",
isbn = "0878492941",
series = "Materials Science Forum",
publisher = "Trans Tech Publications Ltd",
pages = "2121--2126",
editor = "Tara Chandra and Tara Chandra and Tara Chandra and N. Wanderka and N. Wanderka and N. Wanderka and Walter Reimers and Walter Reimers and Walter Reimers and M. Ionescu and M. Ionescu and M. Ionescu",
booktitle = "THERMEC 2009",
note = "6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009 ; Conference date: 25-08-2009 Through 29-08-2009",
}