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http://dx.doi.org/10.14775/ksmpe.2021.20.09.001

A Study on the Method and Application of Shaft Repair using Directed Energy Deposition Process  

Lee, Yoon Sun (Smart Manufacturing Technology R&D Group, KITECH)
Lee, Min Kyu (Smart Manufacturing Technology R&D Group, KITECH)
Sung, Ji Hyun (Smart Manufacturing Technology R&D Group, KITECH)
Hong, Myeong Pyo (Smart Manufacturing Technology R&D Group, KITECH)
Son, Yong (Advanced joining & Additive Manufacturing R&D Department, KITECH)
An, Seouk (Naval Ship Yard, Republic of Korea Navy)
Jeong, Oe Cheol (Naval Ship Yard, Republic of Korea Navy)
Lee, Ho Jin (Smart Manufacturing Technology R&D Group, KITECH)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.20, no.9, 2021 , pp. 1-10 More about this Journal
Abstract
Recently, the repair and recycling of damaged mechanical parts via metal additive manufacturing processes have been industrial points of interest. This is because the repair and recycling of damaged mechanical parts can reduce energy and resource consumption. The directed energy deposition(DED) process has various advantages such as the possibility of selective deposition, large building space, and a small heat-affected zone. Hence, it is a suitable process for repairing damaged mechanical parts. The shaft is a core component of various mechanical systems. Although there is a high demand for the repair of the shaft, it is difficult to repair with traditional welding processes because of the thermal deformation problem. The objective of this study is to propose a repair procedure for a damaged shaft using the DED process and discuss its applications. Three types of cases, including a small shaft with a damaged surface, a medium-size shaft with a worn bearing joint, and a large shaft with serious damage, were repaired using the proposed procedure. The microstructure and hardness were examined to discuss the characteristics of the repaired component. The efficiency of the repair of the damaged shaft is also discussed.
Keywords
Additive Manufacturing; Shaft; Repair; Direct Energy Deposition; Case Study;
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