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Vacuum Heat Treatment Furnace

Vacuum Sintering Furnace

Vacuum Brazing Furnace

Ceramic metal vacuum brazing process flow

Ceramics and metals are the main materials. Ceramics generally use ceramic materials with high temperature stability and good thermal expansion coefficient matching, such as alumina, silicon nitride, etc. Metal materials need to be selected with good compatibility and creep properties with ceramics, such as molybdenum, copper, titanium, etc.

Determine the vacuum brazing process according to actual needs

Ceramic metal vacuum brazing mainly includes four steps: cleaning, patching, high-temperature heating and cooling. First, the ceramics and metals to be joined need to be surface cleaned to remove impurities and oxide layers. Then, place the metal patch on the ceramic surface, taking care to ensure that the patch is flat and tightly fitted. Next, the workpiece is placed in a vacuum furnace and brazed at high temperatures to cause a diffusion reaction between the ceramic and the metal to form a stable connection. Finally, the workpiece is cooled in a vacuum environment and further processed and inspected.

The following aspects need to be considered when selecting equipment:

1.The selection of vacuum furnace requires good sealing performance and temperature control capabilities.

2.Heating methods, commonly used ones include resistance heating, electron beam heating, laser heating, etc., which need to be selected according to the specific situation.

3.Consider the selection of auxiliary equipment such as support devices, fixtures, and vacuum testers.

The following points should be noted during the vacuum brazing process:

1.Surface treatment should ensure the flatness and cleanliness of the connection surface to improve the connection quality.

2.The second is temperature control, which should be reasonably controlled according to the melting point and thermal expansion coefficient of the material to avoid stress and deformation.

3.The selection and coating method of brazing material to ensure sufficient strength and sealing of the brazing joint.

In summary, ceramic-metal vacuum brazing is a complex and important technology, and its success is related to the quality and performance of the connector. In practical applications, we need to select appropriate materials according to specific conditions, reasonably design the process flow, select appropriate equipment, and strictly control each link to ensure the reliability and stability of the brazed connection.