About this Abstract |
Meeting |
Materials Science & Technology 2020
|
Symposium
|
Additive Manufacturing: Materials, Alloy Development, Microstructure and Properties
|
Presentation Title |
Reparation of Co-based Parts Using Additive Manufacturing Technologies |
Author(s) |
Wilfried Pacquentin, Jérome Varlet, Hicham Maskrot, Gilles Rolland, Pierre Wident |
On-Site Speaker (Planned) |
Wilfried Pacquentin |
Abstract Scope |
Direct Laser Deposition (DLD) is a versatile, cost-effective and time-saving tool to repair worn out or damaged parts compatible with a vast panel of metals and complex geometries. In-situ repairing of a component part of a large scale structure may save the complexity of disassembling the host structure using a robot arm to convey the laser beam and the metal powder carrying gas feed. Process parameters include laser beam and powder jet characteristics as well as raster scan strategies and part preparation protocol. The search for the adequate parameter set is at the heart of R&D. We successfully repaired cobalt-based hardfacing coatings in spite of their sensitivity to crack formation induced by extensive thermal cycling. Samples were made using DLD including induction heating, and characterized by non-destructive testing, microstructural examinations and mechanical tests. The quality criteria (dense deposition, minimum porosity and absence of crack) are met. |