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티타늄 합금 부품 제조를 위한 금속 3D 프린터 개발 및 공정 최적화
정원종(Wonjong Jeong),권영삼(Young-Sam Kwon),김동식(Dongsik Kim) 대한기계학회 2015 대한기계학회 춘추학술대회 Vol.2015 No.11
To fabricate Ti alloy parts, a 3D printer based on laser powder deposition (LPD), powder feeding method, has been developed. The printer consists of a ytterbium fiber laser (1070 nm, 1 kW), an Ar purge chamber, a three-dimensional translation stage and a powder feeding system with a powder chamber and powder delivery nozzles. A tapered circular cylinder of 320 mm in height and a tapered square cylinder of 160 mm in height have been fabricated to prove the performance of the printer using Ti-6Al-4V powders. In terms of powder efficiency, Optimization is performed using the process parameters like the laser output power, the scan speed, and the powder feeding rate. The results of tensile test and composition analysis using test specimen fabricated by LPD show that the requirements of Ti alloy are met.