Räjähdyshitsaus

Räjähdyshitsaus, also known as explosive welding, is a solid-state welding process that uses controlled explosions to join two or more metal surfaces. The process relies on the kinetic energy of a high-velocity impact to create a metallurgical bond between the materials. Typically, one piece of metal, called the flyer plate, is positioned at a specific angle above another piece, the base plate. An explosive charge is placed between or on top of the flyer plate. When the explosive detonates, it propels the flyer plate at high speed, causing it to collide with the base plate at a high velocity and acute angle. This impact creates immense pressure and localized heating at the interface, forcing the atoms of the two metals into close proximity, resulting in a bond without melting the base materials.

The advantages of explosive welding include its ability to join dissimilar metals that are difficult or impossible to weld by other methods, such as copper to steel or aluminum to titanium. It is also effective for joining metals with vastly different melting points or those that are prone to embrittlement when melted. The process can produce very strong and ductile joints with excellent corrosion resistance. Applications for explosive welding are found in various industries, including aerospace, shipbuilding, and chemical processing, particularly for creating clad materials like explosion-bonded plates used for heat exchangers, tanks, and pressure vessels. The process requires specialized safety precautions due to the use of explosives and is typically performed in a controlled environment.