How to implement brazing process in vacuum furnace?

During brazing operation in vacuum furnace, the weldment with welding is put into furnace (or brazing vessel), the furnace door is closed (or brazing vessel cover is closed), and vacuum is pre pumped before heating. Start the mechanical pump first, turn the steering valve after the vacuum degree reaches 1.35pa, turn off the direct channel between the mechanical pump and the brazing furnace, make the pipeline connect with the brazing furnace through the diffusion pump, rely on the mechanical pump and the diffusion pump to work for a limited time, pump the brazing furnace to the required vacuum degree, and then start heating. During the whole process of heating, the vacuum unit should work continuously to maintain the vacuum degree in the furnace, offset the air leakage at various interfaces between the vacuum system and the brazing furnace, release the gas and water vapor absorbed by the furnace wall, fixture and weldment, and volatilize the metal and oxide to reduce the vacuum drop.

There are two kinds of vacuum brazing: high vacuum brazing and partial vacuum brazing. High vacuum brazing is very suitable for brazing base metal (such as nickel base superalloy) whose oxide is difficult to decompose. Part of vacuum brazing is used for base metal or solder volatilization under brazing temperature and high vacuum conditions.

When special precautions must be taken to ensure high purity, vacuum cleaning method should be used before dry hydrogen brazing. Similarly, the dry hydrogen or inert gas cleaning method before vacuum pumping will help to obtain better results in high vacuum brazing.

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How to implement brazing process in vacuum furnace? During brazing operation in vacuum furnace, the weldment with welding is put into furnace (or brazing vessel), the furnace door is closed (or brazing vessel cover is closed), and vacuum is pre pumped before heating. Start the mechanical pump first, turn the steering valve after the vacuum degree reaches 1.35pa, turn off the direct channel between the mechanical pump and the brazing furnace, make the pipeline connect with the brazing furnace through the diffusion pump, rely on the mechanical pump and the diffusion pump to work for a limited time, pump the brazing furnace to the required vacuum degree, and then start heating. During the whole process of heating, the vacuum unit should work continuously to maintain the vacuum degree in the furnace, offset the air leakage at various interfaces between the vacuum system and the brazing furnace, release the gas and water vapor absorbed by the furnace wall, fixture and weldment, and volatilize the metal and oxide to reduce the vacuum drop. There are two kinds of vacuum brazing: high vacuum brazing and partial vacuum brazing. High vacuum brazing is very suitable for brazing base metal (such as nickel base superalloy) whose oxide is difficult to decompose. Part of vacuum brazing is used for base metal or solder volatilization under brazing temperature and high vacuum conditions. When special precautions must be taken to ensure high purity, vacuum cleaning method should be used before dry hydrogen brazing. Similarly, the dry hydrogen or inert gas cleaning method before vacuum pumping will help to obtain better results in high vacuum brazing. [url=https://www.vacfurnace.com/whats-the-vacuum-furnace/]vacuum furnace[/url] [url=https://www.vacfurnace.com/vacuum-furnace-manufacturer/]Vacuum furnace manufacturer[/url] [url=https://www.vacfurnace.com/project/vacuum-annealing-furnace/]Vacuum Annealing Furnace[/url]
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