Explosive composite of the introduction Explosive composite, cladding of metals, (also known as explosive welding), its discovery with a little serendipity: in 1944 the American L.R. Carl (Carl) in a dynamite explosion test, accidentally found two pieces of 1-inch diameter, thickness 0.035 inches of thin brass discs, due to the sudden impact of the explosion was welded together. He was also surprised to observe that the welding interface of the two pieces of brass is not flat, but a regular wave-like interface, in the wave head front, which can also be observed due to the metal caused by the vortex "wave". L.R. Carr proposed the use of explosives on a variety of different metals welded together for research topics. Since then explosion welding gradually attracted the interest and attention of scientists. In fact, in the Second World War, people in the repair of the wounded tank, but also often found tilted impact on the tank shrapnel will be firmly welded to the tank armour phenomenon, just during the war people have no time to study it. 1947 Siberian branch of the Soviet Academy of Sciences of the famous scientist M.A. Lavrentev in the study of polygonal ammunition through armour also found this phenomenon, in his paper officially called "explosion welding".
Introduction of exploded metal composite plate An explosion composite plate generally refers to the explosion of a metal composite plate. The explosive composite plate production method will be prepared by placing the composite plate on top of the substrate and then laying a layer of explosives on the composite plate, the use of explosives generated by the explosion of the instantaneous ultra-high pressure and ultra-high-speed impact energy to achieve solid metallurgical bonding between metal layers. The explosive composite plate production process, although simple, and flexible production, but high technical requirements, difficult to accurately control the performance of the parent material (toughness, impact properties, etc.), explosives performance (burst speed stability, safety, etc.), the initial parameters (unit area of explosives, base plate spacing, etc.) and dynamic parameters (collision angle, plate collision speed, etc.) the choice and system with the composite plate has a direct impact on the yield and quality of the finished product. The composite interface consists of a direct bonding area, melting layer and vortex. There is atomic diffusion at the bonding interface, and severe plastic deformation occurs in the bonding zone with process hardening. The bonding surface is a wave-like structure, which is beneficial to the increase of bond strength and tensile strength.
Features of explosive composite plate An explosion composite plate does not change the chemical composition and physical state of the original material, according to the actual needs, the composite material is to be treated individually into the best state required. Explosive composite plate application performance is very good and can withstand cold and hot processing without changing the thickness of the combined materials than the composite material bonding strength is very high, usually higher than the lower side of the combined materials, which can not be achieved by other technologies. The composite material will not produce delamination or cracking in the subsequent production of heat treatment, levelling, cutting, rolling, spinning, etc. For room temperature and 550 ℃ heat treatment of carbon steel surface layer (near the interface layer) have severe deformation caused by the fibrous organization and many fine particles, the heart of the organization of ferrite plus pearlite; stainless steel interface for the second phase point organization, the heart of the needle organization. But the 650 ℃ treatment of carbon steel samples near the interface area of small particles disappeared (indicating that decarburization may occur), the grain becomes coarse, the heart of the organization is still ferrite plus pearlite, but can no longer see the slip lines generated by tissue deformation; and in the stainless steel interface is a large number of small black particles, titanium steel composite plate may be decarburized after the formation of chromium carbide particles material advantages in one, give full play to the different metal materials The use of performance, greatly save the rare metal materials, thus reducing the production cost of equipment. Aluminium/steel, lead/steel, titanium/steel, silver/copper, etc.
Advantages of Explosion Welding The biggest advantage of explosion welding is the ability to weld different metals together. As we all know, various metals such as aluminium and steel, copper and steel, etc. cannot be welded by conventional methods, and even if some special methods are used to weld them together, their welding quality is difficult to guarantee. While explosion welding can do this, and the strength of the welded interface is often greater than the strength of the parent metal. This is unmatched by other welding methods. Currently in engineering commonly used in the explosion welding combination are copper-steel, aluminium-steel, copper-aluminium, titanium-steel, stainless steel-steel, nickel-steel, silver-copper, lead - steel and various uses of the bimetallic or multi-metal composite plate. Another advantage of explosion welding is that it can be welded over a large area, with a welding integrity rate of up to 98% or more, some steel composite plates can also be continuously rolled, made of only a few millimetres thick sheets. Explosion welding not only can be welded on a flat plate but also on a metal tube for outsourcing or in-sourcing welding, that is, in a material metal tube wall or exterior surface, welding on another material thin metal tube. Such as copper tubes and steel tubes, steel tubes and titanium tubes, titanium tubes and purple copper tubes, hard aluminium tubes and soft aluminium tubes of tube-tube welding. These are the other welding methods that can not be replaced.
Application of explosive composite metal materials Explosive composite methods of production of composite materials have been widely used in petroleum, metallurgy, machinery, aerospace, nuclear energy and other industrial fields. The composite plate is a carbon steel substrate, single-sided or multi-sided precious metals as a new bimetallic energy-efficient composite materials, after the special processing process of explosive welding composite, both with precious metal corrosion resistance, wear resistance, but also has good weldability, formability, extensibility, the thermal conductivity of carbon steel; the explosive composite plate is now widely used in petrochemical, metallurgical, salt and alkali, water industry, nuclear industry, nuclear industry. Supplier of metal explosion composite materials TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) provides different kinds of the cladding of metals, such as nickel series clad plate, stainless steel series clad plate, aluminium series clad plate, copper series clad plate, refractory metal series clad plate, etc. Our products are made using explosive composite technology, it is a composite processing technology that uses the huge energy generated by explosives to instantly composite two or more similar or dissimilar materials. Feel free to contact us if you are looking for explosion composite materials and cladding of metals.
