Friction Stir Welding (FSW)
Friction Stir Welding (FSW) technology is a solid state welding process where a non-consumable rotating tool (normally comprised of a shoulder and a probe) is pressed against the materials to be welded. The friction and deformation produced between the tool and the base materials increase the temperature, leading to a softening of the materials to be welded. The tool is traversed along the joint line so that, due to its rotation and specific design, it generates a plasticized material flow, producing a mixture that consolidates the joint in the solid state.
FSW welding is a mature technology, particularly for low melting point alloys (aluminium, magnesium, lead, etc.). FSW welding of aluminium alloys is governed by the ISO25239 standard. LORTEK has participated in the development of this standard as a nationally-acknowledged expert.
The main characteristics of FSW welding are:
Friction Stir Spot Welding (FSSW)
This is the spot welding variant of FSW welding. The image below shows a sketch of the basic principles of the process:
The main characteristics of FSSW welding are:
FSSW welding is a mature technology, particularly for low melting point alloys (aluminium, magnesium, lead, etc.). FSSW welding of aluminium alloys is governed by the ISO18785 standard. LORTEK has participated in the development of this standard as a nationally-acknowledged expert.
Rotary friction welding technology is a solid-state welding process where a rotating part is pressed against a static part. The friction generated at the interface of the parts raises the temperature until the material is softened and plasticized. The rotation of the rotating part is stopped, and the pressure increased, so the two parts are forged together, producing the joint in the solid state.
The main characteristics of rotary friction welding are:
LORTEK also has experience and collaborations in other technologies, such as:
Challenges to be faced in the coming years:
Mechanical Engineer specialized in Material Science by Mondragon Unibertsitatea, MSc Nanoelectronics & Mechanics - University of Sheffield, and MSc International Welding Engineer – CESOL. He joined the Joining Processes area of LORTEK in 2005, where he has mainly worked on the research and development of solid-state joining processes, such as friction welding and flash butt welding processes. Specialized in Friction Stir Welding (FSW) technology, he is the owner of 3 patents with more than 30 scientific publications in international journals and congresses. He is currently senior researcher in the Joining Processes area of LORTEK where he has participated in many research projects. He has also participated in FSW technology transfer and industrialization projects.