Abstract
Friction welding of a 6061 aluminum alloy to a S45C carbon steel was carried out using the insert metal of a 1050 aluminum. Optimum thickness of the insert metal, friction pressure, forge pressure, friction time and rotational speed of welding conditions were determined as 4mm, 90MPa, 300MPa, 1.2s and 2250rpm, respectively. When the insert metal turned into a thin (20-30μm) and homogeneous layer at the weld interface, the maximum joint efficiency of tensile strength was obtained and was about 95%. Successful welds were obtained by taking each optimum welding condition even if the thickness of the insert metal was varied from 2 to 6mm.
