Welding Process Of Water Cooling Plate

Modern electronic liquid cold plates are mainly aluminum alloys, mainly 6 series aluminum alloys. Due to the increasing electronic power density, equipment has higher requirements for reliability, life span, and failure rate during life. In this way, the flow channel structure of the water cold plate is becoming more and more complicated, and the complexity is mainly determined by the temperature field requirements of the module. Rather than rely solely on the maximum temperature point to determine. In addition to thermal design and simulation, the determination of the temperature field is more critical to the qualification of the welding process and its stability.

The current mainstream welding methods for water cold plate are FSW and vacuum brazing. These two welding processes are not good or bad, just like lamb and fish are better for the body. It is impossible to generalize.

Cold plate manufacturers think that their technology is good. The choice of welding process for cold plates is determined by the nature of the runner structure, and of course it is also determined by combining the number of products and other special requirements. In principle, the series cooling channel adopts FSW, and the parallel channel adopts vacuum brazing. The spiral flow channel adopts vacuum brazing, and the ‘several’ shaped flow channel adopts FSW.

At present, the application of the two welding processes in the cold plate industry is still relatively extensive. Basically, no cold plate manufacturer has the ability to deeply understand these two types of welding. The so-called welding technology is still in the hands of the operator. Not to mention the reliability of welding and welding quality assessment. At most, it is the difference between leaking or not leaking at the factory, and the difference between leaking more and less leaking during production.