Laminated metal composite material is a new type of functional material that uses high-energy-rate processing technology to combine different or different metal materials that cannot be connected by two or more common processing technologies (such as welding). The layered metal composite material combines the advantages of various components and makes up for their respective deficiencies. It can improve the mechanical properties, thermoelectric properties, magnetism, formability, weldability, corrosion resistance and other properties of the material. It has excellent comprehensive performance. Widely used in all aspects of the national economy.
Explosive welding compound method is a kind of high-tech with high practical value that uses explosives as energy source for welding between metals. Its biggest use is to manufacture bimetallic and multimetal composite materials of various combinations, shapes, sizes, and uses in large areas. Compared with other methods, the characteristics of this method are: instantaneous high temperature and high pressure and high cooling rate; high strain rate; locality and mobility of the applied load; the composite interface of the composite plate exhibits wavy bonding; it is not affected by the melting point of the material , Plastic restrictions, flexible composite size specifications, etc. The explosive welding compound method is mainly suitable for the production of single sheet products with large area and thick composite sheet products or composite slabs and multilayer composite boards. The explosive welding compound method has been able to successfully compound more than 300 metals, and more than 50 practical metal combinations are being put into practical use, such as titanium
/steel, titanium/steel/stainless steel, titanium
/stainless steel, titanium/copper, stainless steel
/Steel, copper/steel, copper/silver, etc.
Explosive welding is a method of welding metal between explosives. This kind of welding uses a detonator to detonate the explosive. The high-pressure pulse load generated by the explosion acts on the composite plate, and the composite plate is driven to be accelerated to every second in a few microseconds. A speed of several hundred meters; starting from the detonation position, the multi-layer plate and the base plate in turn form a high-speed oblique collision. The pressure generated by the collision of two metals greatly exceeds the dynamic yield limit of the metal. In the vicinity of the collision point, a sharp plastic deformation with a very high deformation rate is generated. This is an adiabatic process, and the two metal surfaces to be combined instantly form a fluid-like behavior, forming two metal jets with opposite movement directions. The free jet located in front of the collision point ejects into the space of the unbonded area at high speed, washing away the oxide film and contaminants on the surface of the two metals to be bonded, revealing a clean active surface, which provides the necessary conditions for welding; The metal jet forms a wavy metallurgical bond under high pressure.
Explosive welding technology has unique advantages in the manufacture of composite materials of any metal combination. By adding metal fibers or other high-strength fibers in the metal matrix to improve the mechanical properties, corrosion resistance and fatigue resistance of composite materials, it is a modern composite material. Direction of development. In the field of research on a new type of functional material, amorphous alloy, which has attracted much attention at home and abroad, explosive welding technology has also shown its talents. The use of explosive welding technology to prepare bulk amorphous alloys is a new application field of explosive welding technology.
With the increasing demand for special synthetic materials by modern science and technology, the exploration of explosive welding technology has been further accelerated. For example, an underwater explosive welding device appeared, which used a method of underwater explosion loading to weld a 0.1 mm thick aluminum plate to a ceramic container at a speed of 800 m/s, effectively solving the problem that ceramic materials are easily cracked and broken during explosive welding of metal and ceramic The problem of transferring explosive energy to welding materials through underwater shock waves has opened up new ideas for the popularization and application of explosive welding technology.