Abstract
In the aluminum porthole extrusion process, excessive wear occurs on the surface of mandrel. This study evaluates the applicability of direct metal deposition (DMD), a 3D printing process, for repairing the hot aluminum extrusion die. The wear characteristics of three die repairing methods (parent-STD61, DMD-STD61, and welded-STD61) were compared through a high-temperature pin-on-disk wear test that considers the aluminum extrusion temperature. The results confirm that DMD results in superior wear characteristics when compared to overlay welding repair method. Further, the wear resistance of DMD-STD61 is similar to that of parent-STD61. The application of the DMD process is expected to yield a wear life similar to that of the parent STD61.
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Sung-Yun Lee received his B.S. (2011) from Kyungil University, and his M.S. (2013) from Kyungpook National University, Korea. He is currently a researcher at the Extreme Fabrication Technology Group at Korea Institute of Industrial Technology (KITECH), and Ph.D. candidate of School of Convergence Science at Pusan National University, Korea. His major research is aluminum extrusion process.
In-Kyu Lee received his B.S. (2010) from International University, and his M.S. (2012) from Pusan National University, Korea. He is currently a researcher at the Extreme Fabrication Technology Group at Korea Institute of Industrial Technology (KITECH), and Ph.D. candidate of Department of Mechanical Engineering at Pusan National University, Korea. His research interests include cold/hot forging, die design technology.
Sang-Kon Lee received his B.S. (1998), M.S. (2000), and Ph.D. (2008) from Pusan National University in Korea. Dr. Lee is currently the Principal Researcher at the Extreme Fabrication Technology Group at Korea Institute of Industrial Technology (KITECH) in Korea. His major research field is metal forming technologies including wire and shape drawing, aluminum/ magnesium extrusion, and cold/hot forging processes.
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Lee, SY., Lee, IK., Jeong, MS. et al. Wear characteristics of STD61 tool steel according to repairing methods for Al porthole extrusion die: Direct metal deposition, welding, parent material. J Mech Sci Technol 32, 2237–2244 (2018). https://doi.org/10.1007/s12206-018-0434-z
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DOI: https://doi.org/10.1007/s12206-018-0434-z