Abstracts Book - IMRC 2018

• SE2-O038
MICROSTRUCTURE AND PROPERTIES OF LASER CLADDING OF
WC-Co-Cr ALLOYS SYNTHESIZED BY MECHANICAL MILLING
Rosa Adriana Garcia Hernandez 1 , Victor Hugo Baltazar Hernández 1 , Juan Manuel Alvarado
Orozco 2 , Juan Muñoz Saldaña 3 , Haideé Ruiz Luna 4
1 Universidad Autónoma de Zacatecas, Maestría en Ciencia e Ingeniería de Materiales, Mexico.
2 Centro de Investigación y Desarrollo Industrial (CIDESI), Investigacion, Mexico. 3 Centro de
Investigación y de Estudios Avanzados del IPN - CINVESTAV, Investigador, Mexico. 4 Consejo
Nacional de Ciencia y Tecnologia - CONACYT, Catedras-CONACYT, Mexico.
Additive manufacturing processes, such as laser cladding, are extensively
employed to deposit wear-resistant materials (viz. WC cermets) on planar and
highly complex surfaces. WC-based alloys are used in a wide range of industrial
applications due to their high hardness and toughness, and excellent sliding,
abrasive and erosive wear behavior. Notwithstanding, the wear rate of these
materials depends on the carbide grain size and distribution. Nano-sized WC
particles perform better than conventional micro-sized carbide. However,
extensive decomposition or decarburization of nanometric WC particles may
result during deposition as a consequence of the laser-powder interactions,
compromising its mechanical properties and wear performance. In this study,
WC10Co4Cr and WC30Co4Cr alloys with nanometric and bimodal carbide grains
are synthetized by high energy ball milling and deposited by laser cladding in
order to investigate the correlation between the laser cladding processing
parameters on the deposited WC grain size. The results of the laser-material
interaction in terms of structural (degree of dilution and decarburization of WC
particles) and microstructural changes (porosity) and mechanical properties
(hardness) are presented and discussed.
Keywords: Laser cladding, nanometric and bimodal WC-Co-Cr powder, microstructure
Presenting authors email: adriana.gar.her@gmail.com