Manufacturing method for vapor chamber, vapor chamber and middle frame vapor chamber

A manufacturing method for a vapor chamber, comprising:

• preparing different raw materials for various parts of the vapor chamber, and machining and molding the various parts according to predetermined shapes of the various parts by using corresponding raw materials;
• assembling the machined and molded various parts of the vapor chamber, and welding and sealing the assembled various parts of the vapor chamber;
• performing a surface heat treatment on the vapor chamber after welding and sealing;
• performing a passivating treatment on the vapor chamber subjected to the surface heat treatment;
• assembling the vapor chamber subjected to the passivating treatment with a liquid injection pipe;
• injecting water into the vapor chamber assembled with the liquid injection pipe;
• vacuumizing the vapor chamber injected with water;
• performing a sealing treatment on the vacuumized vapor chamber;
• welding the vapor chamber subjected to the sealing treatment with a reinforcing rib;
• wherein performing a passivating treatment on the vapor chamber subjected to the surface heat treatment, comprises:
• placing the vapor chamber subjected to the surface heat treatment in a hydrogen furnace, keeping a temperature of the hydrogen furnace between 500° C. and 950° C., turning off the hydrogen furnace after heating for 1 hour to 6 hours, and cooling the vapor chamber along with the hydrogen furnace to normal temperature;
• wherein assembling the vapor chamber subjected to the passivating treatment with a liquid injection pipe, comprises:
• performing an annealing treatment on the liquid injection pipe;
• and
• inserting the liquid injection pipe subjected to the annealing treatment into a water injection port of the vapor chamber to be fixed by welding;
• wherein performing a sealing treatment on the vacuumized vapor chamber, comprises:
• heating the vapor chamber, and discharging gas in the vapor chamber through the liquid injection pipe;
• and
• sequentially sealing and cutting the liquid injection pipe;
• wherein performing a surface heat treatment on the vapor chamber after welding and sealing, comprises:
• placing the vapor chamber after welding and sealing in an oven, keeping a temperature of the oven between 100° C. and 400° C., and baking the vapor chamber for 1 hour to 5 hours.