Análisis de material de aporte en el proceso de soldadura GTAW aplicado en el acero inoxidable martensítico AISI 420 y su influencia en las propiedades mecánicas

Abstract

The present research work is based on the GTAW welding process made in AISI 420 martensitic stainless steel joints with ER 308L and ER 312 filler material. Subsequently, samples were obtained to perform destructive impact tests, hardness, guided bending and traction; whose results have been evaluated in this research work with the purpose of determining the influence of the materials of contribution in the mechanical properties of the welded joints. This research project is based on the AWS code D1.6 "Structural Welding Code Stainless Steel" whose code establishes general provisions for carrying out the welding process in stainless steels. The tests were conducted at the Polytechnic School of Chimborazo in the laboratories of the school of mechanics, for its development was counted with the guidance and advice of the technicians of the different laboratories of materials and tests; as well as equipment was used. The data obtained were tabulated and the best contribution material was selected by means of a suitable analysis in order to determine which has a better influence on the properties of the AISI 420 martensitic stainless steel. At the end of the research project, conclusions and recommendations were obtained based on the results obtained in order to contribute to improve the welding procedures in this type of material that can be applied in the industrial field.