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Open AccessFeature PaperArticle

Analysis of the Influence of the Use of Cutting Fluid in Hybrid Processes of Machining and Laser Metal Deposition (LMD)

Department of Mechanical Engineering, University of the Basque Country, Plaza Torres Quevedo 1, 48013 Bilbao, Spain
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Coatings 2018, 8(2), 61; https://doi.org/10.3390/coatings8020061
Received: 24 January 2018 / Revised: 31 January 2018 / Accepted: 4 February 2018 / Published: 7 February 2018
Hybrid manufacturing processes that combine additive and machining operations are gaining relevance in modern industry thanks to the capability of building complex parts with minimal material and, many times, with process time reduction. Besides, as the additive and subtractive operations are carried out in the same machine, without moving the part, dead times are reduced and higher accuracies are achieved. However, it is not clear whether the direct material deposition after the machining operation is possible or intermediate cleaning stages are required because of the possible presence of residual cutting fluids. Therefore, different Laser Metal Deposition (LMD) tests are performed on a part impregnated with cutting fluid, both directly and after the removal of the coolant by techniques such as laser vaporizing and air blasting. The present work studies the influence of the cutting fluid in the LMD process and the quality of the resulting part. Resulting porosity is evaluated and it is concluded that if the part surface is not properly clean after the machining operation, deficient clad quality can be obtained in the subsequent laser additive operation. View Full-Text
Keywords: additive manufacturing; laser metal deposition; hybrid machines; cutting fluid; coolant; lubricant; porosity; Inconel 718 additive manufacturing; laser metal deposition; hybrid machines; cutting fluid; coolant; lubricant; porosity; Inconel 718
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Cortina, M.; Arrizubieta, J.I.; Ukar, E.; Lamikiz, A. Analysis of the Influence of the Use of Cutting Fluid in Hybrid Processes of Machining and Laser Metal Deposition (LMD). Coatings 2018, 8, 61.

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