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

전자빔을 이용한 Stellite21 분말 예열공정에 관한 기초 연구

Lee, Ho-Jin;Song, Jae-Guk;Kim, Jin-Suk;Ahn, Dong-Gyu
이호진;송재국;김진석;안동규

  • Received : 2016.03.30
  • Accepted : 2016.04.18
  • Published : 2016.05.01

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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Cited by

  1. Estimation of Effective Thermal Conductivity of Ti-6Al-4V Powders for a Powder Bed Fusion Process Using Finite Element Analysis vol.19, pp.2, 2018, https://doi.org/10.1007/s12541-018-0030-2

Acknowledgement

Grant : 전자빔을 이용한 고융점 초합금 쾌속생산공정 원천기술개발

Supported by : 산업통상자원부