Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 381-386 |
| Number of pages | 6 |
| Journal | Procedia CIRP |
| Volume | 68 |
| DOIs | |
| Publication status | Published - 2018 |
| Event | 19th CIRP Conference on Electro Physical and Electro Chemical Machining 2018 - Bilbao, Spain Duration: 23 Apr 2017 → 27 Apr 2017 |
Keywords
- Laser metal deposition
- Coatings
- Non-preheat
- Geometrical characteristics
- Co-Based
- Fe-Based
- Ni-Based
Project and Funding Information
- Project ID
- info:eu-repo/grantAgreement/EC/H2020/723440/EU/A Productive, Affordable and Reliable solution for large scale manufacturing of metallic components by combining laser-based ADDItive and Subtractive processes with high Efficiency/PARADDISE
- Funding Info
- The authors acknowledge the European Commission for_x000D_ support of Project "PARADDISE: a Productive, Affordable_x000D_ and Reliable solution for large scale manufacturing of_x000D_ metallic components by combining laser-based ADDItive and_x000D_ Subtractive processes with high Efficiency” (Grant_x000D_ Agreement 723440),which is an initiative of the Photonics_x000D_ and Factories of the Future Public Private Partnership.