- [Korean]
- Mechanical Property Improvement of the H13 Tool Steel Sculptures Built by Metal 3D Printing Process via Optimum Conditions
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Jaecheol Yun, Jungho Choe, Haengna Lee, Ki-Bong Kim, Sangsun Yang, Dong-Yeol Yang, Yong-Jin Kim, Chang-Woo Lee, Ji-Hun Yu
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J Korean Powder Metall Inst. 2016;24(3):195-201. Published online June 1, 2016
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DOI: https://doi.org/10.4150/KPMI.2017.24.3.195
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Abstract
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In this study, H13 tool steel sculptures are built by a metal 3D printing process at various laser scan speeds. The properties of commercial H13 tool steel powders are confirmed for the metal 3D printing process used: powder bed fusion (PBF), which is a selective laser melting (SLM) process. Commercial H13 powder has an excellent flowability of 16.68 s/50 g with a Hausner ratio of 1.25 and a density of 7.68 g/cm3. The sculptures are built with dimensions of 10 × 10 × 10 mm3 in size using commercial H13 tool steel powder. The density measured by the Archimedes method is 7.64 g/cm3, similar to the powder density of 7.68 g/cm3. The hardness is measured by Rockwell hardness equipment 5 times to obtain a mean value of 54.28 HRC. The optimum process conditions in order to build the sculptures are a laser power of 90 W, a layer thickness of 25 μm, an overlap of 30%, and a laser scan speed of 200 mm/s.
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Citations
Citations to this article as recorded by 
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