Structure characteristics of vacuum hot pressure diffusion welding furnace

Structure characteristics of vacuum hot pressure diffusion welding furnace

Features: 1. The partition heater arrangement is adopted, so that the temperature uniformity in the heating zone is consistent. 2. Brazed in vacuum atmosphere, can keep the workpiece clean and bright.

Composition: Equipment vacuum system is mainly composed of vacuum chamber, pump system and control valves and heat exchangers. The pump system consists of mechanical pump, maintenance pump, Roots pump, diffusion pump and so on. Valves include front valve (disc valve), bypass valve (disc valve), maintenance pump valve (disc valve) and high valve (plate valve), each valve is pneumatic valve, controlled by PLC pneumatic valve. The heating chamber is mainly composed of stainless steel heating chamber housing, stainless steel reflection screen, heater, ceramic insulation parts, water-cooled electrode, furnace bed and so on

Diffusion welding of materials is based on one of the main properties of a "physically pure" surface that has the ability to "bond" due to cracked atomic bonds. With the use of vacuum and other methods of surface purification, it is possible to join two or more surfaces using the atomic bond described above, and the subsequent diffusion process on the surface increases the strength of the connection. Diffusion welding requires a sufficient extrusion pressure so that the distance between the welded surfaces is reduced to the radius of the interaction of the forces between atoms. The pressure required to join a material should be sufficient to eliminate microscopic irregularities on the workpiece surface. In a vacuum, only a small pressure above the recrystallization temperature is sufficient to engage the welded parts in contact. If the joint area is diffused and has a volume characteristic, the reliability and strength of the connection are obtained. With this welding method, various materials with different hardness, strength and mutual wetting can be connected, including dissimilar metals, ceramics and cermet, which cannot be welded with fusion welding method.

Article content from the network, if you have any questions please contact me to delete!