Análisis de soldadura en frío y costura mecánica para fisuras en hierro fundido gris y su aplicación en la reconstrucción de un block.

Abstract

Nowadays the recovery by welding in cast iron components is very important, considering that these foundries are of common use in the industrial area. However, this objective is not easy to achieve because of the physical properties of this material. Its difficulty in welding can be due to several factors such as low plasticity due to its high carbon content, the formation of cementite, formation and growth of pores or other factors that affect or decrease the mechanical properties of the material. In the following research work, the analysis of cold welding and mechanical sewing is shown by means of an experimental process carried out in the gray cast iron joints, applying different variables in the mechanical sewing process considering variables such as the diameter of bolts, distances between bolts and material of the bolts used in the mechanical sewing process for each of them. The procedure of mechanical sewing and cold welding was evaluated by means of specimens which were subjected to traction, hardness and Charpy impact tests and metallographic analysis was also carried out on the base material in order to determine the mechanical properties, the tests were carried out in the laboratories of the Faculty of Civil and Mechanical Engineering of the Technical University of Ambato, later the results were tabulated and analyzed, obtaining as a conclusion that group E is the one that obtained a better behavior, this process being suitable for cold welding and mechanical sewing Finally, through the analysis carried out, this process could be applied in the reconstruction of a block, checking that cold welding and mechanical sewing is applicable in the recovery of gray cast iron components.