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아세틸렌 가스 유동 분석 및 DOE를 통한 노즐설계 최적화에 관한 연구
양성문(Sung-Moon Yang),유재현(Jae-hyun Yu),김준호(Jun-ho Kim),김현진(Hyun-Jin Kim),김민한(Min-han Kim),노태열(Tae-yeol Roh),박상만(Sang-man Park) 한국기계가공학회 2023 한국기계가공학회지 Vol.22 No.2
Low-temperature vacuum carburizing is a heat-treatment method that improves surface performance by creating a diffusion layer on the surface of the processed material using an acetylene-mixed gas in a vacuum-carburizing furnace. In the low-temperature range, hydrocarbon gases, such as acetylene, are directly introduced through a pipe nozzle into the furnace, where they are carburized on the processed material. However, the surface hardening layer on the current processed material is not formed uniformly. To analyze this problem, ANSYS CFD was used, and the results confirmed that the discharge amount of each nozzle connected to the carburizing furnace was not uniform. To solve this problem, the nozzle design was optimized by analyzing the discharge amount according to the nozzle shape change using the Taguchi (DOE) technique to reduce the deviation between the nozzles. In this study, an improvement of 62.5% was obtained by reducing the flow velocity deviation of the nozzle. In addition, through experimental verification, the overall surface can be carburized uniformly; therefore, we believe that it can be applied to actual processes.