Friction Welding Liquid Cold Plate

Friction welding is a solid-state welding technique that joins materials without reaching their melting points. This method uses pressure, combined with constant or increasing torque, to generate frictional and plastic deformation heat at the contact surfaces. The heat produced raises the temperature in the contact area to a range near but typically below the melting point of the materials. As the temperature increases, the material’s deformation resistance decreases, its plasticity increases, and the oxide film at the interface breaks down. Under the applied pressure, molecular diffusion and recrystallization occur at the interface, resulting in a solid-state weld through the material's plastic deformation and flow.

Unlike traditional fusion welding, friction welding does not melt the materials being joined. Instead, it creates a thermoplastic state where solid-phase bonding occurs. This process results in welded joints that can match the strength of the base materials, offering high welding efficiency, consistent quality, and the ability to weld dissimilar materials.

When applied to liquid cold plate manufacturing, friction welding addresses the challenges of joining high-density, ultra-wide profiles. By splicing two or more profiles, this technique allows for the creation of ultra-wide, high-density structures with lower mold development costs, shorter production cycles, and high stability. Leveraging extensive data accumulated by their research and development team, Lori Thermal has developed numerous standard profiles. They continue to expand their product library, offering users a variety of splicing options to meet their specific needs.