Caracterización del recubrimiento con electrodo B-83 sobre acero dúplex 2205

Abstract

The purpose of this work is to analyze the behavior of the overlay made with electrode B-83 on duplex steel 2205, with and without the help of an interfase made with electrode R-91 between them. Both the interfase and the overlay were deposited through the SMAW welding process. For the evaluation of the overlay through of the ASME section IX code, sixteen test pieces were obtained, eight of them without the use of the interfase, configuration B-83 and the other eight with the use of the interfase, configuration R-91 + B-83.

The ASME section IX code establishes the acceptance or rejection parameters for guided bending tests and penetrating inks, for the first one, four test pieces of each configuration are used, two in transverse direction and two in longitudinal direction, while for the second one it is used a test piece of configuration B-83 and other of configuration R-91 + B-83. For a better analysis of the deposit obtained as an overlay, an industrial radiography test was performed on the test pieces used for penetrating inks, this allows to determine if there are internal discontinuities that can affect the behavior of the material.

To establish the microstructural changes that occur and how they affect to mechanical behavior, additional tests such as macrography, micrography and microhardness are performed for the two configurations before and after performing a corrosion process.

The corrosion process makes it possible to predict the behavior of the overlay when it works in exposed outdoor environments.