RT Conference Proceedings
T1 Characteristics of Fe-, Ni- and Co-based Powder Coatings Fabricated by Laser Metal Deposition without Preheating the base Material
A1 Ramiro, Pedro
A1 Alberdi, Amaia
A1 Ortiz, Mikel
A1 Lamikiz, Aitzol
A1 Ukar, Eneko
AB The objective of this work was to select the best material from Fe-, Ni- and Co-based alloy powder for coating, by Laser Metal Deposition (LMD) the filets of a hardened 42CrMoS4 extrusion screw without preheating process. Even though most of the articles recommended preheating the base material as a condition for a crack free coating, the time wasted in the process decrease the productivity and distortions can be also generated in the part. In this work, a comparison of the main characteristics of the coatings done on preheated and non-preheated base material has been made. The relationships between the relevant LMD parameters (feed rate, laser power, and powder feeding rate) and the main geometrical characteristics of a single clad (height, width, dilution, deposition rate, efficiency, etc.) were examined. In addition, different characteristics of overlapped clads in a preheated, non-preheated and a hardened base material have been also analyzed. All the study was made in the Ibarmia ZVH 45/1600 Add+Process hybrid machine with a high power Yb-Fiber laser (3 kW) and discrete coaxial LMD head. Coatings with thickness from 1.2 to 0.76 were created without cracks and other defects except in the case of Ni-based coating. The microstructural features of these coatings were studied using optical and scanning electron microscopy. The mechanical properties were determined using microhardness measurements and a pin on disk tribometer.
SN 2212-8271
YR 2018
FD 2018
LA eng
NO Ramiro , P , Alberdi , A , Ortiz , M , Lamikiz , A & Ukar , E 2018 , ' Characteristics of Fe-, Ni- and Co-based Powder Coatings Fabricated by Laser Metal Deposition without Preheating the base Material ' , Procedia CIRP , vol. 68 , pp. 381-386 . https://doi.org/10.1016/j.procir.2017.12.099
NO Publisher Copyright: © 2018 The Authors. Published by Elsevier B.V.
DS TECNALIA Publications
RD 1 jul 2024