A INFLUÊNCIA DA CORRENTE ELÉTRICA NA PROFUNDIDADE E DUREZA DE VÁLVULAS AUTOMOTIVAS

Abstract

Taking into account that the plasma welding process is a considerably new process, studies on it are always important, thus deducing new means for the improvement and efficiency of the process. Note the importance of a successful weld, thus reducing some defects that may occur in the weld In relation to the weld there are some defects such as insufficient depth, inadequate hardness and the invasion of the addition material on the upper face of the valve. This type of welding is applied to the valve seat, this area in turn is considered a critical area, since once there is a defect like the ones mentioned, it can compromise the operation of the engine. With the first use of a three-piece test, it was identified how each reacted according to the electrical current submitted. Right after the first test, a new test was carried out with eight parts, thus seeking to optimize the process and obtain the appropriate current for the process.