![]() The bending strength at the junction reaches 103.11% of the substrate and 107.75% of the substrate in the remanufactured region. ![]() The tensile strength of the remanufactured structure in the scanning direction reaches 135.62% of that of the substrate, and the plasticity is increased by 26.62% compared to the matrix. The tensile strength at the bonding interface reached 102.21% of that of the substrate, and the plasticity is essentially similar. The hardness of the remanufactured tooth is 396.35 ± 10.11 HV 0.2. The results show that the microstructure of the 3D remanufactured structure consists of discrete α-Fe dendrites with light-colored reticular γ-Fe and the presence of granular precipitation phase Ni 3(Ti, Mo) in reticular γ-Fe. First, reasonable process parameters were achieved through optimal matching of laser energy and powder feeding rate, and the microstructure and mechanical properties of the repaired and bonded regions of the simulated fractured tooth specimens were then systematically analyzed. ![]() ![]() ![]() In this paper, LDED remanufacturing study of 3D-damaged components using 18Ni300 was conducted for the demand of high-quality repair of broken teeth of 42CrMo gears. Laser-directed energy deposition (LDED) provides a fast and environmentally friendly method for remanufacturing high-value engineering parts, but systematic research into the remanufacturing of 3D-damaged components is lacking. ![]()
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