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고에너지 직접적층제조 (DED) 공정에 의한 석출경화형 STS630 소재의 적층 최적화 연구
권용재(Yongjae Kwon),신성선(SeongSeon Shin),주상은(SangEun Joo),이종훈(JongHoon Lee),황준호(JunHo Hwang),김현덕(HyunDeok Kim) 대한용접·접합학회 2021 대한용접·접합학회지 Vol.39 No.6
The quality and properties of products manufactured using metal three dimensional (3D) printing technology differs based on the process parameters. In addition, the characteristics and uses vary depending on the material used. In this study, the Direct Energy Deposition(DED) technology using a precipitation hardening type STS630 was investigated. The experimental process parameters, namely, the beam size, powder feeding rate, laser header moving speed, laser output power were set, and the deposition height and dilution were analyzed through deposition crosssection analysis after experiments according to each Additive Manufacturing(AM) process variable. The results showed that the deposition height decreased as the laser header moved faster. It was further observed that the dilution ratio and the width of the heat affected zone depended on the laser power and powder feed rate. The optimal process parameters were identified as a beam size of 1 ㎜, powder feeding rate of 6 g/min, laser header moving speed of 500 ㎜/min, and a laser output power of 500 W.