Estudio de la soldabilidad de un acero de alta aleación mediante el proceso SMAW con diferente material de aporte

Abstract

The present work aims to study the weldability of high strength steels using the SMAW process using different contribution materials. The work is carried out from the structural and metallurgical point of view and the experimental stage considered the following variables: current intensity, voltage, welding speed, input material and preheating temperature, these parameters are determined in order to obtain the best welded joint. In order to validate base material, a chemical analysis buy spark emission spectrometry was performed to determine its chemical composition and a tensile test was applied in the reduced section to verify its mechanical resistance. In the welded joints, visual inspection tests, non-destructive tests, mechanical tests were carried out. With these results, the Welding Procedure Specifications (WPS) qualified with the optimal variables and to guarantee the quality of the weld according to the AWS D1.1 standard. A metallographic test is carried out in order to know the variation of the microstructure in the base material, in the area affected by heat and contribution material, also to know the area affected by heat It is necessary to perform the macrography test, the hardness test using the Rockwell B scale makes it easy to determine the area where it has the greatest hardness.