Estudos preliminares para o desenvolvimento de um conector bimetálico de cobre e alumínio pela soldagem por fricção convencional

Abstract

Friction welding and mechanical mixing, when compared to other solid state welding methods, is one of more recent, but there are already many studies and applications for it. This technique consists of joining two materials that are difficult to weld using conventional techniques. The friction welding method that joins materials in a solid state without melting them. The quality of this weld depends on several factors such as: rotation speed, feed and contact time. The presente work aims to develop a bimetallic connector between copper (C110) and aluminum (6060 T5). For this, three different cases were proposed: the first and the second used a continuous advance of 100 mm/min, with rotations of 3000, 5000 and 7000 RPM for the conical proof bodies and with hole, in case 1 the aluminum having the hole conical and copper with conical shape, in case 2 the geometries between the materials are inverted, in the third case, the proof bodies had bith ends flat and the speeds adopted were 1000, 2000 and 3000 RPM, maintaining the same advance of the previous cases. The objectives consist of the visual analysis and also the tensile test to determine the best parameters. According to this analysis, the other phases of the study, comparing with the bibliography and other studies, it was noticed that even in the best situations the results cannot be considered satisfactory, for example, it has been that the greatest resisted force was 2943,03 N and an average tensile strength of 21,01 MPa, values found in case 3 at 1000 RPM, evidencing the low resistance in relation to the base materials. However, this study serves as a basis and as a pre-tests in the comparison and development of new geometries with different parameters.