Cold Pressure Welding
Cold pressure welding is a pressure joining process without heat input, where ductile materials are atomically welded through plastic deformation at the contacting surfaces.
Physico-Chemical Mechanism of Action
Cold pressure welding uses the plastic deformability of metals to join them. Without additional heat input, the material structure is deformed under pressure, and the atomic structure of the contacting surfaces fuses.
Metallurgical Relevance & Welding Risks
Cold pressure welding is well suited for materials such as steel, nickel alloys, and aluminum. It prevents the occurrence of cracks and increases joint strength. However, excessive pressure or insufficient deformation can lead to material damage.
Workshop Practice & Operating Instructions
Cold pressure welding requires a specialized press device that applies pressure to the joint surfaces. The pressure should range between 100 and 200 MPa, depending on the material. The deformation of the materials should be at least 5%. Excessively high temperatures can damage the material, so a cool environment is essential.