Cold Pressure Extrusion Welding
Cold press seam welding is a room-temperature process that metallurgically bonds fresh metal surfaces through plastic deformation. It avoids heat-affected microstructural changes and forms a strong joint.
Physico-Chemical Mechanism of Action
Cold press seam welding exploits the plastic flowability of metals under room-temperature conditions. By pressing seams, surfaces are metallurgically joined without thermal processes like melting or hardening.
Metallurgical Relevance & Welding Risks
This process is especially suited for high-strength steels and materials with low ductility. It avoids the risk of hot cracking and thermal distortion that can occur with conventional welding processes. However, insufficient pressure or excessive stress can lead to splitting or fracture.
Workshop Practice & Operating Instructions
Cold press seam welding requires a specialized device that controls the pressure on the seams. The pressing stress should be adjusted according to material and application. A typical pressing stress ranges from 50 to 200 N/mm². It is important that the seams are clean and smooth to ensure an optimal joint.