Application and Analysis of Micro-Cladding Parameters for H13 Powder Under 4340 Aisi using a Fibre Top-Hat Laser
DOI:
https://doi.org/10.18066/revistaunivap.v32i73.4619Palavras-chave:
micro-cladding, AISI 4340, EHLA, Top-hat profiling, Ytterbium laserResumo
The laser micro-cladding is obtained by material deposition of interest with energy optimization aiming for a lower thermal effect, and consequently depositing a smaller and optimized structure. The technique follows the same development as laser-directed deposition (L-DED) methods. However, using boundary conditions that promote effective use of the high-energy central region of top-hat profile lasers. Therefore, this technique has a wide range of applications in engineering. However, it is still little covered in the literature, especially regarding these boundary conditions. With this in mind, this paper aimed the apply and analysis of micro-cladding parameters from previous studies. To this end, a methodological route composed of irradiation starting parameters is proposed. Next, with a deposition of one-track lines, coat-areas, and micro-additive metallurgical manufacturing structures. Using a H13 tool steel as coating powder, under discoidal substrates 25X5 mm of AISI 4340. With an experimental set-up consisting of a Ytterbium fibre laser, transported by a robotic arm, and a powder aspersing system. With this, obtained optimum parameters of the laser's power of 1300 W and velocity of scanning of 11 mm/s were obtained. The final results produced structures with well-densification and superior Vickers microhardness, with metallurgical bonding.
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