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Transformaciones microestructurales por efecto del calor en una unión disímil de acero 17-4 PH y Hastelloy C-276.

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Title: Transformaciones microestructurales por efecto del calor en una unión disímil de acero 17-4 PH y Hastelloy C-276.
Alternate Title: Microstructural transformations by heat effect in a dissimilar joint of 17-4PH steel and Hastelloy C-267 superalloy.
Authors: Fernández-Columbié, Tomás H.1 tfernandez@ismm.edu.cu, Gómez-Fernández, Maikel2, Lamorú-Urgellés, Marbelis1, Romero-Góngora, Walter1, Hernández-Verdecia, Maikel1
Source: Minería y Geología. ene-mar2020, Vol. 36 Issue 1, p81-91. 11p.
Subject Terms: *Dissimilar welding, *Heat resistant alloys, *Precipitation hardening, *Welding, *Martensite
Abstract (English): The heat effect produced by the welding on the microstructural variations of a dissimilar joint of precipitation hardening, 17-4 PH (type AISI 630) and the B 574 (Hastelloy C-276) was analyzed. To determine this effect, the electrode E NiCrMo-4 with a diameter of 3.2 mm was used, the deposit was made in joints prepared with bevels of 60o in "V" and butted, welded by only one side of the material. After the welding process the thermal influence area, the interface, and the molten zone were microstructurally characterized. From the effect of the supplied heat, the presence in the microstructure of austenitic associated to the austenite of lath or dendrite morphology was determined, as well as the presence of austenite Widmanstätten and precipitation of secondary austenite inside the martensite. [ABSTRACT FROM AUTHOR]
Abstract (Spanish): Se analizó el efecto del calor producto de la soldadura en las variaciones microestructurales de una unión disímil de acero endurecible por precipitación, del tipo 17-4 PH (AISI 630) y la superaleación Hastelloy C-276 (B 574). Para determinar dicho efecto se empleó el electrodo E NiCrMo-4 con diámetro de 3,2 mm; el depósito se realizó en uniones preparadas con biseles de 60o en "V" y a tope, soldados por un solo lado del material. Se caracterizó microestructuralmente la zona fundida, la zona de influencia térmica y la interfase, luego de realizado el proceso de soldadura. Se determina que por el efecto del calor aportado se obtiene, en la microestructura, la presencia de la austenítica unida a la austenita de morfología tipo dendrítico o de listoncillos, así como la presencia de austenita Widmanstätten y precipitación de austenita secundaria en el interior de la martensita. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
Description
Abstract:The heat effect produced by the welding on the microstructural variations of a dissimilar joint of precipitation hardening, 17-4 PH (type AISI 630) and the B 574 (Hastelloy C-276) was analyzed. To determine this effect, the electrode E NiCrMo-4 with a diameter of 3.2 mm was used, the deposit was made in joints prepared with bevels of 60o in "V" and butted, welded by only one side of the material. After the welding process the thermal influence area, the interface, and the molten zone were microstructurally characterized. From the effect of the supplied heat, the presence in the microstructure of austenitic associated to the austenite of lath or dendrite morphology was determined, as well as the presence of austenite Widmanstätten and precipitation of secondary austenite inside the martensite. [ABSTRACT FROM AUTHOR]
ISSN:02585979