Monografia (especialização)
Avaliação metalúrgica da soldagem de revestimento com aço inoxidável austenítico sobre aço ASTM A-36
Fecha
2016-12-13Autor
Edésio Edmur Duarte Louzada Júnior
Fabiano Feliciano Alves de Souza
Institución
Resumen
The welding coating is the process in which an addition metal layer is deposited on
the surface of another material in order to obtain desired properties or dimensions. It is
generally used to extend the useful life of parts that do not have all the properties
necessary for a given application, for the recovery of elements affected by wear or
corrosion or for the creation of surfaces with special characteristics.
The use of welding coating to create surfaces with special characteristics has
increased in the industrial environment and, considering the different types of coating
materials, stainless steels are characterized as one of the most frequent applications. For
these cases, stainless steels are generally deposited on surfaces of carbon steels or low
alloy steels, producing a layer with anti-corrosive and strength properties required to
withstand environments subject to high corrosion wear. The results of this process have
made this application quite attractive in that corrosion resistant surfaces can be
produced from common and lower cost materials compared to the use of pure stainless
steel components which are costly. Therefore, the applications of welding coating
carbon steel with stainless steels extend across the most diverse types of industries, such
as oil, chemical, food, agricultural, nuclear, naval, railway, construction, among several
others.
The objective of the present work was a metallurgical evaluation of didactic character
of the welding of austenitic stainless coating on an ASTM A-36 carbon steel plate.
Where two layer coating simulations were carried out on test bodies with electrodes of
different grades of stainless steel. Dilutions were analyzed and the microstructures
obtained were analyzed, and these were compared with the prediction of constitutional
diagrams, in particular, with the Schaeffler diagram.