FRICTION STIR WELDING OF S235 STEEL

The simplicity of the process, the possibilities of automation, environmental impact and health and in particular economic efficiency, friction stir welding (FSW) recommended as an alternative to classical methods of arc welding of steels. At FSW of steel a key factor in obtaining quality welds without flaws, is the correct choice of the welding tool in terms of geometry and dimensions, but also the material from which they are made. The experimental program developed for welding of S235 steel, s=3mm thickness, showed his good behavior in FSW application, while respecting the correct principles of: FSW machine, parameters used and geometric and dimensional characteristics of welding tools. The high degree of use of S235 steel in various industrial fields, certain possibilities, as demonstrated by the application of FSW, good mechanical characteristics of welded joints obtained, recommends implementation of FSW technology in the manufacture of welded structures from this material.