Eventos Anais de eventos
COBEF 2023
12th Brazilian Congress on Manufacturing Engineering
DIRECTED ENERGY DEPOSITION OF H13 TOOL STEEL FOR MOLD AND DIE REPAIR
Submission Author:
Alcindo Moreira , SP
Co-Authors:
Alcindo Moreira, Fábio Mariani, Reginaldo Coelho, Wayne Nguyen Phu Hung
Presenter: Wayne Nguyen Phu Hung
doi://10.26678/ABCM.COBEF2023.COF23-0571
Abstract
The Directed Energy Deposition (DED) process can be used for engineering component repair. This paper presents a preliminary research study of repairing an injection mold by utilizing DED as an effective metal additive manufacturing. Factorial engineering experiments were designed to optimize the microstructure of DED deposited H13 powder on rolled plates of the same material. The DED deposition at 56 J/mm2 energy density, 6.50 mg/mm2 powder density, 67° scanning strategy at 0.9 mm hatching distance provided the optimal microstructure with minimum porosity. Fast cooling rate of a deposited layer resulted in significant higher hardness level due to the inevitable martensitic transformation of a thin deposited layer on a large substrate. Despite isolated pores, shear testing confirmed that the high-quality interface was achieved since cracks initiated and propagated outside of the heat affected zone and away from the interface.
Keywords
H13 tool steel, Directed Energy Deposition, Interface, Shear testing
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