cold welding
metallurgy
Quick Summary
Cold welding is a metallurgical process that joins metals without applying heat. This is achieved by pressing the metal surfaces together with sufficient force to cause deformation, typically between 35% and 90%, depending on the material. High pressures, often in the range of 1,400,000 to 2,800,000 kilopascals, are required. This technique is commonly used for lapped joints in sheets and for cold-butt welding of wires. Surfaces must be meticulously prepared for successful adhesion.1
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