A bimetallic composite plate is a layered composite material produced by joining two or more metals-differing in material composition and properties-through a specific solid-state bonding process that creates a metallurgical bond at the interface.
Unlike alloys, which are formed by fusing multiple metals into a single mixture, bimetallic composite plates consist of distinct metal layers; while each layer retains its original physical and chemical properties after bonding, the material functions as a unified whole in terms of mechanical and electrical performance. This structure allows the material to overcome the limitations of individual metals and leverage the specific advantages of each constituent, thereby achieving complementary and optimized performance.
Key manufacturing processes: Bonding bimetallic composite plates almost invariably requires the application of pressure or high temperatures. Common production methods include:
Roll bonding: This includes hot roll bonding, cold roll bonding, and differential-speed roll bonding; it is currently the most widely used method. Explosion bonding: This utilizes the instantaneous ultra-high pressure and high-velocity impact generated by an explosive detonation to induce intense mechanical effects between metal layers, achieving a solid-state metallurgical bond. Other processes: These include extrusion bonding, cast-rolling, multi-layer spray deposition, and weld overlay bonding.