Aluminum Clad Stainless Steel Plate For Aircraft Industry

Bonding mechanism of bimetal composite

The mechanism of Aluminum clad stainless steel plate for aircraft industry is extremely complex, and many scientists have studied it from different angles.

A variety of bonding mechanisms have been developed. These theories have promoted the development of composite material production. In turn, the continuous improvement of composite material production process has promoted the increasingly perfect composite theory.

Pot and Shaoxing alloys have many advantages, such as high specific strength, low density, good plasticity, good electrical and thermal conductivity, and good corrosion resistance. At present, stainless steel has been widely used in life, automobile, ship, electrical engineering, chemical industry, national defense, and other industrial fields, and has many advantages, such as high strength, candle resistance, dryability It is easy to process and has luster on the surface. Now it has been widely used in the automobile, chemical industry, aerospace, medicine, new energy, and other industrial fields.

What is Explosive welding?

The schematic diagram of the explosive welding method of parallel placement for explosive welding is shown in Fig. 1.1 (a). After the end explosive is detonated at the initiation point, the clad plate metal will bend under the high pressure of the explosive products, as shown in Fig. 1.1 (b). After the explosive is detonated, the clad plate will be quickly bent under the impact of the explosive product, accelerated to hundreds of meters per second in a few microseconds, and then collided with the base plate. The pressure at the collision point between the clad plate and the base plate can reach tens of thousands of MPa, which greatly exceeds the dynamic yield limit of the two metal plates. As the substrate and cladding plate are under great pressure, the behavior of the metal at the impact point will be similar to "fluid" at the moment of impact. At the same time, the kinetic energy of the cladding plate will be converted into internal energy, causing the temperature near the interface to rise rapidly. This means that the interface is characterized by high pressure, high temperature, and high deformation during explosive welding. This procedure has several parameters

: The velocity at the impact point Ve, the dynamic bending angle of the cladding plate, the downward flight velocity Vp and the installation clearance H, etc. Generally speaking, when the welding is in a stable state, the velocity at the impact point is close to or the same as the explosive detonation velocity, and the bending angle of the flyer plate is the contact angle between the cladding plate and the substrate during the welding process, The flying speed of the flyer plate is the linear speed of the flyer plate at the contact point between the flyer plate and the flyer plate. Through the practice of explosive welding, people have gained the following experience: the explosive detonation velocity should be as small as possible, which can reduce the interface wave height; The dynamic bending angle (3 should be between 5 ° and 25 °; Vp speed directly affects the thickness of the transition layer and melting layer, and the melting layer and transition layer with too wide thickness will weaken the bonding strength; the installation clearance H is a necessary condition for the compound plate to obtain the flight speed, and the installation clearance is also related to the dynamic bending angle.