Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
ANALYSIS OF THE MECHANICAL BEHAVIOR IN THE INTERFACE OF THE BUTTERING WELD OF STEEL AISI 4130 WITH INCONEL 625
Submission Author:
José Silva , PB
Co-Authors:
Roneles de Santana, Daniel Beltrão, Antonio Marcos Vila Nova, José Silva
Presenter: Antonio Marcos Vila Nova
doi://10.26678/ABCM.COBEM2017.COB17-1663
Abstract
The main objective of this work was to analyse the mechanical behavior of the buttering weld of the AISI 4130 steel with the nickel alloy 625. The interface of the buttering with the base metal has been shown to be fragile to the hydrogen from cathodic protection. Several researches have been developed, however few have dealt with the welding procedure. Randomized design by levels in experimental development was adopted. As factor of influence the conventional and pulsed welding current modes were analyzed. The response variables were the dilution of the base metal, the microstructure and the mechanical properties at the interface between the buttery and the base metal. The results showed that the conventional current mode presents a more unstable arc, consequently the presence of splash was observed, whereas in the pulsed current mode, a stable arc was observed without splash. The microstructural analysis also showed that the buttering performed with pulsed current has lower levels of dilution than the conventional current mode. In addition, it was verified that the interface of the buttery with pulsed current mode, promoted greater control of partially diluted zones, minimizing the formation of fragile zones, resulting in a joint with greater mechanical resistance.
Keywords
welding, Buttering, Nickel alloy, Mechanical Properties
