Estudio de la influencia de la onda cuadrada desbalanceada en las propiedades mecánicas de la soldadura de aleación de aluminio con el proceso GTAW

Abstract

Aluminum is a material that is due to the difficulty of breaking its oxide layer when being welded. Soldering aluminum with alternating current in the TIG method generates a constant change of polarity that effects each cycle of time, that is to say that during a cycle, for one instant one pole is negative and the other positive, while in the next instant the polarities are it invests as many times as cycles per second or hertz possesses that current, and although there is a constant change of polarity, the current is always done with the negative pole to the positive, and what is the process that a level of instability must have. However, although this type of current provides a uniform heat reduces the possibility of holes or pores forming in the weld, there are instants in which the current will decrease its value, which is a slower process and with Limitation in thicknesses. Currently, welding equipment has been developed that rectifies and unbalances the wave, becoming the alternating current in the square type, which allows a stability of the process and an exact control for the time of ionic cleaning and cooling of the electrode. This at the same time allows to visibly improve the quality of the welding and extends the limit of the welding in terms of thicknesses.