Water-cooled Plate Vacuum brazing

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As an important part of the water cooling system, the cold plate is mainly to fully exchange the heat generated by the heating components with the cooling liquid. In order to ensure that the heating surface of the device can take away all the heat dissipated as much as possible when it is cooled by liquid, the contact between the device and the cold plate and the thermal resistance of the cold plate are particularly important!

Typical applications for water cooled plate:

1. Transportation: electric locomotives, motor cars, electric ships, electric vehicles, etc.

2. Power transmission: UHV DC transmission, flexible DC transmission

3. New energy: wind power generation, photovoltaic power generation

4. Other: industrial Frequency conversion, signal processing, UPS, medical, laser and so on.

How to implement the brazing process for cold plates in a vacuum furnace?

During the brazing operation in the vacuum furnace, the welded parts are loaded into the furnace (or into the brazing container), the furnace door is closed (or the brazing container cover is closed), and the vacuum is pre-pumped before heating. Start the mechanical pump first, and when the vacuum is reached, turn off the direct path between the mechanical pump and the brazing furnace, so that the pipeline communicates with the brazing furnace through the diffusion pump, and relying on the mechanical pump and the diffusion pump to work for a limited time to pump the brazing furnace to the required level The vacuum degree, and then start electric heating.

During the whole process of heating , the vacuum system should be continued to work to maintain the vacuum in the furnace to offset the air leakage at various interfaces of the vacuum system and the brazing furnace, and the gas and water absorbed by the furnace shell, fixtures and fixture and jigs. The release of vapor and the volatilization of metals and oxides reduce the vacuum.

There are two types of vacuum brazing: high vacuum brazing and partial vacuum (medium vacuum) brazing. High-vacuum brazing is very suitable for brazing base materials whose oxides are difficult to decompose (such as nickel-based alloys). Partial vacuum brazing is used where the base material or brazing material volatilizes under brazing temperature and high vacuum conditions.

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