Estudio de perfiles de microdureza en depósitos de soldadura subacuática
Fecha
2009-06-20
Autores
Gómez Machado, José Alberto
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Editor
Universidad Central "Marta Abreu" de Las Villas
Resumen
La soldadura subacuática mojada, empleando el proceso manual con electrodo revestido (SMAW), es actualmente la técnica más empleada para realizar trabajos de
reparación en condiciones subacuáticas mojadas, debido a las características de maniobrabilidad propias de la técnica (tecnología). A partir de la realización del ensayo
de microdureza para una soldadura subacuática a 50 metros de profundidad, con
varias muestras del mismo material pero con diferentes recubrimientos, se logran
obtener una serie de resultados, relacionados con los diferentes valores de microdureza en la ZAC, los cuales permiten delimitar con mayor exactitud cada una de
las regiones de la ZAC. En la zona de granos gruesos se alcanzan altos valores de
microdureza por encima de los 500 Hv, lo cual es producto de la formación de una
estructura martensítica. Con los perfiles de microdureza y la ecuación de Hall Petch se
establece una relación, la cual permite comprobar el comportamiento de la dureza en
toda la ZAC.
Underwater wet welding, using the manual process with coated electrode (SMAW), is currently the most widely used technique to perform repair work on underwater wet conditions due to the handling characteristics of the technique itself (technology). Since the test of microhardness for underwater welding to 50 meters deep, with several samples of the same material but with a different coating is to obtain a series of results related to the different values of microhardness in the HAZ, the allowing more precise delineation of the regions of the HAZ. In the coarse grain area is reached high values of microhardness above 500 Hv which is a product of the formation of a martensitic structure. With the profiles of microhardness and Hall Petch equation establishing a relationship which shows the behavior of the hardness across the HAZ.
Underwater wet welding, using the manual process with coated electrode (SMAW), is currently the most widely used technique to perform repair work on underwater wet conditions due to the handling characteristics of the technique itself (technology). Since the test of microhardness for underwater welding to 50 meters deep, with several samples of the same material but with a different coating is to obtain a series of results related to the different values of microhardness in the HAZ, the allowing more precise delineation of the regions of the HAZ. In the coarse grain area is reached high values of microhardness above 500 Hv which is a product of the formation of a martensitic structure. With the profiles of microhardness and Hall Petch equation establishing a relationship which shows the behavior of the hardness across the HAZ.
Descripción
Palabras clave
Soldadura, Soldadura Subacuática, Soldadura con Electrodo Revestido