Caracterización de la soldadura de aceros inoxidables ferríticos con material de aporte austenítico

Abstract

The present work has as main objective to analyze and to study the welding in ferritic stainless steels with material of austenitic contribution through the diagram of Schaeffler, destructive tests and metallographic study. It is important to know the difficulties presented by the ferritic stainless steel in the area of welding in order to find viable solutions that achieve an effective and reliable welding. One of the problems presented by stainless steel is ferritic in the weld, since the grain of this steel tends to an excessive growth, due to the speed of the diffusion of the material at high temperatures that cause the reduction of the tenacity of the ductility and corrosion in welded areas. One of the causes why the grain grows excessively is by the shape of its structure since it has a cubic structure of centered body (BCC), and all this type of structure produces that its transformation of phase in the cooling and solidification of the material tends to be excessively slow.