Vacuum diffusion welding process application in liquid cooling plate

     Vacuum diffusion welding technology refers to heating two flat and smooth welding surfaces to a certain temperature under a certain vacuum degree. Without adding any solder or intermediate metal, under the simultaneous action of temperature and pressure, after micro plastic rheology, they are in close contact with each other, and the electrons, atoms or molecules on the contact surface of the weldment are diffused and transferred to each other, And form ionic bond, metal bond or covalent bond. After a period of heat preservation, the composition and structure of the welding area are homogenized to achieve a complete metallurgical connection process.

The Benefits and Advantages:

  1. The welding process is a diffusion process after forming a joint without the participation of liquid phase. The composition and structure are completely consistent with the matrix, no as cast structure remains in the joint, and the original interface disappears completely. Therefore, the physical, chemical and mechanical properties of the original base metal can be maintained.

 2. Because the matrix of diffusion welding is not overheated or melted, it can weld almost all metal and non-metallic materials without damaging the properties of the materials to be welded. It is especially suitable for materials that are difficult to achieve by general welding methods, or materials that can be welded but whose performance and structure are easy to be seriously damaged in the welding process.

3. It can weld different types and even very different materials. Including dissimilar metals, metals and ceramics and other materials that are completely immiscible in metallurgy. 

4. Complex structure and great thickness difference are also available. 

5. The Uniform heating, no deformation of weldment and no residual stress. Make the workpiece maintain high precision geometric size and shape.

    In some liquid cooling  panels and liquid cold plate  with special structural design, under the condition of large-area composite and micro channel, vacuum diffusion welding is the best choice to realize the welding of  these products.