Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Manufacturing of Fe-Mn-Al-C Based Low Mn Lightweight Steel Via Direct Energy Deposition

Direct energy deposition 공정을 이용한 Fe-Mn-Al-C계 저망간 경량철강 제조

  • Ko, Kwang Kyu (Department of Materials Engineering and Convergence Technology, Gyeongsang National University(GNU)) ;
  • Son, Han Sol (School of Materials Science and Engineering, Kookmin University) ;
  • Jung, Cha Hee (School of Materials Science and Engineering, Kookmin University) ;
  • Bae, Hyo Ju (Department of Materials Engineering and Convergence Technology, Gyeongsang National University(GNU)) ;
  • Park, Eun Hye (Department of Materials Engineering and Convergence Technology, Gyeongsang National University(GNU)) ;
  • Kim, Jung Gi (Department of Materials Engineering and Convergence Technology, Gyeongsang National University(GNU)) ;
  • Choi, Hyunjoo (School of Materials Science and Engineering, Kookmin University) ;
  • Seol, Jae Bok (Department of Materials Engineering and Convergence Technology, Gyeongsang National University(GNU))
  • 고광규 (경상국립대학교 나노신소재융합공학과) ;
  • 손한솔 (국민대학교 신소재공학과) ;
  • 정차희 (국민대학교 신소재공학과) ;
  • 배효주 (경상국립대학교 나노신소재융합공학과) ;
  • 박은혜 (경상국립대학교 나노신소재융합공학과) ;
  • 김정기 (경상국립대학교 나노신소재융합공학과) ;
  • 최현주 (국민대학교 신소재공학과) ;
  • 설재복 (경상국립대학교 나노신소재융합공학과)
  • Received : 2022.08.25
  • Accepted : 2022.08.28
  • Published : 2022.08.28
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Abstract

Lightweight steel is a crucial material that is being actively studied because of increased carbon emissions, tightening regulations regarding fuel efficiency, and the emergence of UAM, all of which have been recently labeled as global issues. Hence, new strategies concerning the thickness and size reduction of steel are required. In this study, we manufacture lightweight steel of the Fe-Mn-Al-C system, which has been recently studied using the DED process. By using 2.8 wt.% low-Mn lightweight steel, we attempt to solve the challenge of joining steel parts with a large amount of Mn. Among the various process variables, the laser scan power is set at 600 and 800 W, and the laser scan speed is fixed at 16.67 mm/s before the experiments. Several pores and cracks are observed under both conditions, and negligibly small pores of approximately 0.5 ㎛ are observed.

Keywords

Acknowledgement

이 논문은 2022년도 정부(한국연구재단 및 과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 기초연구사업임(NRF-2021R1A2C4002622 및 NRF-2022R1A5A1030054).

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