Abstract
ABSTRACT In this study, AISI M2 powder was selected primarily through various pieces of literature in order toimprove the hardness and wear resistance. Among the laser metal deposition parameters, laser power wasstudied to improve the deposition efficiency in the laser metal deposition using a diode-pumped disk laser.An SKD61 hot work steel plate and AISI M2 powder were used as a substrate and powder for laser metaldeposition, respectively. Experiments for the laser metal deposition were carried out by changing the laserpower and track layer. The quality of the track surface and cross-section after applying the single-layermethod was better than that obtained from applying the multi-layer method. As the laser power increased, thetrack thickness was increased, and the surface roughness deviation was decreased. In laser power condition of1.6kW, the maximum hardness of the deposition track was 790Hv. This value was 40% better than thehardness of the SKD61 after heat treatment.Key Words : AISI M2 Powder(철계파우더), SKD61(열간금형강), Laser Metal Deposition(레이저메탈디포지션), Track(트랙), Layer(적층)
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