Principle of vacuum diffusion bonding process

Tue May 03 09:42:59 CST 2022

Vacuum Diffusion Bonding is a Solid-state welding method that pressurizes the workpiece at high temperature

Diffusion welding refers to a solid-state welding method in which the workpiece is pressurized at high temperature without visible deformation and relative movement. Diffusion welding is especially suitable for the combination of dissimilar metal materials, heat-resistant alloys, ceramics, intermetallic compounds, composite materials and other new materials, especially for materials that are difficult to weld by fusion welding methods. Diffusion welding has obvious advantages and is increasingly attracting people's attention.

The welding method is a welding method in which the welding parts are closely attached and kept under a certain temperature and pressure for a period of time, so that the atoms between the contact surfaces diffuse each other to form a connection. The main factors affecting the diffusion welding process and joint quality are temperature, pressure, diffusion time and surface roughness. The higher the soldering temperature, the faster the atoms diffuse. The welding temperature is generally 0.5 to 0.8 times the melting point of the material.