INTECIN   20395
INSTITUTO DE TECNOLOGIAS Y CIENCIAS DE LA INGENIERIA "HILARIO FERNANDEZ LONG"
Unidad Ejecutora - UE
artículos
Título:
GTAW-Pulsed Refusion Patterns of NiCrBSi Thermal Sprayed Coatings
Autor/es:
MIRANDA, ALEJANDRO OSCAR; SVOBODA, HERNÁN GABRIEL
Revista:
Key Engineering Materials
Editorial:
Trans Tech Publications Ltd
Referencias:
Lugar: Stafa-Zurich; Año: 2019 vol. 813 p. 304 - 309
Resumen:
NiCrBSi coatings were produce by Flame Spray on a carbon steel substrate. The ?as spray? coatings were refused by means of Pulsed Gas Tungsten Arc Welding (GTAW-P) process, following different patterns and welding procedure, with objective of optimize the coating characteristics and productivity. The patterns evaluated were oscillated triangular (OT) and oscillated sinusoidal (OS). Travel speed and workpiece-electrode distance were also analyzed. On each obtained sample the surface appearance, macro and microstructure on transverse cuts were evaluated, determining penetration, dilution and level of defects, among others features. Microhardness profiles and adherence were also evaluated. The OS pattern show a more uniform profile of the refused thickness, with less dilution with the base material. Travel speed and workpiece-electrode distance have both significant effect on the volume of refused material, affecting dilution and consequently the resultant coating hardness.