Título
Metallurgical characterization of a weld bead coating applied by PTA process on the D2 tool steel
Autor
ANA MARIA ARIZMENDI MORQUECHO
FELIPE ARTURO REYES VALDES
Nivel de Acceso
Acceso Abierto
Materias
Resumen o descripción
In this investigation, a nickel-base powder mixed with tungsten carbide particles was applied by Plasma Transferred Arc welding (PTA) on the surface of the D2 cold work tool steel to improve the surface quality and to extend its life time during applications. To obtain appropriate combination of hardfacing parameters and to run minimum number of experiments, the Design of Experiment (DOE) method was applied. Current, travel speed and preheat were considered as variable parameters. These parameters are important to reach a final layer with an appropriate bead geometry and accompanied with good metallurgical properties. All samples were prepared for metallurgical investigations and the effect of process parameters on the weld bead geometry was considered. For each run of experiment, weld bead geometry parameters including dilution, penetration and reinforcement were measured. Microstructures and the distribution of tungsten carbide particles after welding were analysed by Optical Microscopy and Scanning Electron Microscopy equipped with EDS microprobe. In addition, microhardness tests were performed to evaluate the mechanical properties of the weld bead layers. Finally, amongst all the experiments, the best sample with appropriate bead geometry and microstructure was selected.
Fecha de publicación
2015
Tipo de publicación
Memoria de congreso
Versión de la publicación
Versión enviada
Recurso de información
Formato
application/pdf
Idioma
Inglés
Repositorio Orígen
Fuente de Objetos Científicos Open Access
Descargas
849