The mechanical processing of bimetallic transition inserts is another important subsequent processing after pressure processing, heat treatment and welding, and it is also an indispensable processing procedure for such practical applications.

Similar to single metal materials, machining of bimetallic transition inserts (such as aluminum steel transition joints) includes cutting, machining, leveling and straightening, and forming. In these processes, it is divided into processing in a hot state and a normal temperature state. Therefore, the scope is quite extensive and the content is quite rich.
The mechanical processing of bimetallic transition inserts of different metals must first consider the following factors, which can be used to understand some of the characteristics of the machining of such materials.

(1)  The mechanical properties of the base metal of the cladding metal.
(2)  The physical properties of the cladding metal and the base metal are different.
(3)  The bonding morphology and properties of the bonding zone and the cladding layer are different. For example, the metal in the bond zone has plastic deformation, melting and diffusion, and the characteristics of the waveform. Depending on the composition of the matrix, either the solid solution in the melt of the bonding zone, or an intermetallic compound, or a mixture thereof;
(4)  After the explosion welding, a certain degree of strengthening and hardening occurs inside the base metal, and residual stress of a certain size and direction is distributed throughout the composite material.

Therefore, in each and every machining process, the influence of the above factors on the machining results must be considered, so as to lay a foundation for obtaining high-quality products.