[T7] AM Sinter Based Technologies

[16A-T7-20] Microstructure and Mechanical Properties of High-Carbon Steel Alloy Fabricated by Spark Plasma Sintering (SPS) and Material Extrusion (ME)

*J.-C. Kim¹, C. V. Dinh¹, S.-G. Lee¹, D.-W. Lee¹, S. Shin¹, C.-S. Kim², W.-H. Kim³ (1.University of Ulsan, Korea, 2.KITECH, 3.Klabs, Korea)

Keywords:High-carbon steel, Spark Plasma Sintering (SPS), Material Extrusion (ME)

In the next-generation mobility field, various researches are being conducted on the metal additive manufacturing process to reduce the weight and integrate products. Among metal additive manufacturing technologies, laser-based additive manufacturing technology has difficulty in mass production due to low productivity with limitations in power lamination speed. However, sintering-based additive manufacturing technology can produce the mass production and manufacture the complex shaped parts.High-carbon refer to alloy steel with a carbon content of 0.5wt% or more. High-carbon steel has very high hardness and a high yield point. so it can be applied as next-generation mobility parts.In this study, spherical high-carbon steel alloy powder with a carbon content of 1.5wt% or more was manufactured using a gas atomization method. specimens were manufactured using the material extrusion(ME) process, a sintering-based additive manufacturing process, and in order to compare with these specimens. specimens were also manufactured through the spark plasma sintering (SPS) process. the microstructure and mechanical properties of each manufactured specimens were compared and analyzed.