Deposition Characteristics of High-Thermal-Conductivity Steel in the Direct Energy Deposition Process and its Hardness Properties at High Temperatures

• Autorzy: Son Jong-Youn , Shin Gwang-Yong , Lee Ki-Yong , Yoon Hi-Seak , Shim Do-Sik

Identyfikatory

DOI

10.24425/amm.2020.133701

• Języki publikacji: EN

Abstrakty

EN

Direct energy deposition (DED) is a three-dimensional (3D) deposition technique that uses metallic powder; it is a multi-bead, multi-layered deposition technique. This study investigates the dependence of the defects of the 3D deposition and the process parameters of the DED technique as well as deposition characteristics and the hardness properties of the deposited material. In this study, high-thermal-conductivity steel (HTCS-150) was deposited onto a JIS SKD61 substrate. In single bead deposition experiments, the height and width of the single bead became bigger with increasing the laser power. The powder feeding rate affected only the height, which increased as the powder feeding rate rose. The scanning speed inversely affected the height, unlike the powder feeding rate. The multi-layered deposition was characterized by pores, a lack of fusion, pores formed by evaporated gas, and pores formed by non-molten metal inside the deposited material. The porosity was quantitatively measured in cross-sectionsof the depositions, revealing that the lack of fusion tended to increase as the laser power decreased; however, the powder feeding rate and overlap width increased. The pores formed by evaporated gas and non-molten metal tended to increase with rising the laser power and powder feeding rate; however, the overlap width decreased. Finally, measurement of the hardness of the deposited material at 25°C, 300°C, and 600°C revealed that it had a higher hardness than the conventional annealed SKD61.

Słowa kluczowe

EN

direct energy deposition; HTCS-150; pore; lack of fusion; hardness

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2020
• Tom: Vol. 65, iss. 4
• Strony: 1365--1369
• Opis fizyczny: Bibliogr. 4 poz., fot., rys., tab.

Twórcy

autor

Son Jong-Youn

• Chonnam National University, Department of Mechanical Engineering, Gwangju, Republic of Korea
• Korea Institute of Industrial Technology, Smart Manufacturing Process Group, Gwangju, Republic of Korea

autor

Shin Gwang-Yong

• Korea Institute of Industrial Technology, Smart Manufacturing Process Group, Gwangju, Republic of Korea

autor

Lee Ki-Yong

• Korea Institute of Industrial Technology, Smart Manufacturing Process Group, Gwangju, Republic of Korea

autor

Yoon Hi-Seak

• Chonnam National University, Department of Mechanical Engineering, Gwangju, Republic of Korea

autor

Shim Do-Sik

• Korea Maritime and Ocean University, Division of Mechanical Engineering, Busan, Republic of Korea

Bibliografia

• [1] Y. K. Won, Future trend of 3D printing in the center of manufacturing revolution, 3D printing guide 3, 23 (2017).
• [2] M. F. Schneider, Laser cladding with powder, Print Partners Ipskamp (1998).
• [3] J. Y. Son, H. Y. Yoon, KY. Lee, S. H. Park, D. S. Shim, Investigation into high-Temperature interfacial strength of heat-Resisting alloy deposited by laser melting process, Met. Mater. Int. 1-11 (2019).
• [4] T. Mukherjee, T. DebRoy, Mitigation of lack of fusion defects in powder bed fusion additive manufacturing, Journal of Manufacturing Processes 36, 442-449 (2018).

Uwagi

EN

1. This work was supported by the Korea Institute of Energy Technology Evaluation and Planning (KETEP) under grant number 2018201010633B.

PL

2. Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).