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http://dx.doi.org/10.7736/KSPE.2016.33.5.419

Preliminary Study on Pre-Heating Process of Stellite21 Powder Using Electron Beam  

Lee, Ho-Jin (Department of Mechanical Engineering, Chosun University)
Song, Jae-Guk (Department of Mechanical Engineering, Chosun University)
Kim, Jin-Suk (IT Convergence Process Group, Korea Institute of Industrial Techonology)
Ahn, Dong-Gyu (Department of Mechanical Engineering, Chosun University)
Publication Information
Journal of the Korean Society for Precision Engineering / v.33, no.5, 2016 , pp. 419-425 More about this Journal
Abstract
A powder spreading phenomenon is one of disadvantageous characteristics of the powder bed fusion process using electron beams. The powder spreading phenomenon can be controlled using a pre-heating process of metallic powders. The aim of this paper was to investigate the preheating process of Stellite21 powder using electron beams. Powder spreading experiments were performed to examine the influence of process parameters on the spreading behaviors of Stellite21 powder. Powder heating experiments were carried to investigate the effects of the focusing current of the electron beam on the quality of the heated region. Using the results of the powder spreading and heating experiments, an appropriate combination of process parameters was obtained. The pre-heating experiment of Stellite21 was performed using the estimated combination of process parameters. The results of preheating experiments showed that the preheated Stelllite21 layer with desired characteristics can be created when the estimated combination of process parameters is applied.
Keywords
Electron beam; Stellite21 powder; Pre-Heating process; Powder spreading;
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Times Cited By KSCI : 3  (Citation Analysis)
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