What is Explosive Welding Plates?
Cladding Of Metals, that is, the metal composite plate created by the explosive welding method (explosion welding method), explosive welding plate generally refers to the explosion of the metal composite plate. An explosive welding composite plate is a kind of composite material plate manufactured by using explosive forming technology, and its manufacturing process involves multiple steps like explosive forming, metal composite, and surface treatment.
Metal explosive welding technology is a composite material processing technology that utilizes the large energy generated by the instantaneous generation of explosives to instantly composite 2 or more kinds of similar or dissimilar materials together, and this technology can weld metals with different properties, particularly those that are not dissolved, into one piece.
Compared with the direct rolling composite method:
(1) loading speed, that is, the loading process is instantaneous ;
(2) Placed on the workpiece high-pressure pulse load, loading stress is much higher than the yield strength of the metal material;
(3) The bonding area shows wave-like metallurgical bonding characteristics;
Explosive welding composite plate history
Explosive composite discovery is the earliest in 1944, the American L.R. Karl (Carl) in a dynamite explosion test, accidentally found two bits of 1-inch diameter, thickness of .035 inches of thin brass discs, because of the sudden impact of the explosion and was welded together. In fact, in World War II, people in the repair of wounded tanks, but also often found that tilted impact to the tank around the shrapnel is going to be firmly welded to the tank armor phenomenon, just during the war individuals have no time to study it.
In 1947, the Siberian branch of the Soviet Academy of Sciences, the famous scientists M.A. Lavrentsev in study regarding polymer bombs to penetrate the armor also found this phenomenon, in his dissertation formally referred to as “explosive welding”.
In the area of welding, the welding of various materials, like steel and aluminum, steel and copper, is technically very difficult. And huge welding depth of welding can also be very difficult, if you wish to use conventional welding, shielding welding and other welding methods is going to be two 40mm thick wide plate welded into a 80mm thick wide plate, it really is estimated that no one can do. However, the explosive welding is perfect to solve the 2 problems simultaneously.
Explosive welding composite plate principle production method
Explosive welding is a composite plate manufacturing method that combines one or even more materials into a single piece using explosives because the energy source. After the explosion of explosives, the blast products form a higher-pressure pulse load, directly acting on the compound plate, promoting the high-speed movement of the compound plate, within the collision reason for the compound plate and the substrate tilt collision, accompanied by violent plastic deformation and the formation of the jet, the jet takes away the surface of the contamination layer, so the welded metal flat plate with a clean surface in contact with one another at high temperatures and high pressures, the two kinds of plate will realize the strong metallurgical bonding.
Explosive welding composite plate-specific production methods:
1. Explosion molding
Explosion molding is the first step within the creation of explosive welding composite plates. In the explosion forming process, explosives in certain conditions instantly detonated, the resulting high-pressure gas is going to be pushed to the other side of the metal plate mold, so the metal plate instantly to get the desired size and shape. This forming technique is described as high precision and high efficiency.
2. Metal composite
In the explosion molding, the necessity for metal composite. This step is generally used in explosion welding or explosion crimping and other methods, 2 or more metal plates with the explosion energy combined together to form a composite material. Throughout the metal composite process, a metallurgical reaction occurs between different metals, forming a strong metallurgical bond.
3.Surface treatment
Surface therapy is usually required to improve the surface quality and corrosion resistance of the explosive welding plate. Commonly used surface treatment options include spraying, plating, chemical plating and so forth. These methods can increase the wear resistance, corrosion resistance and aesthetics of the composite plate.
Explosive welding composite plate production process, although simple, flexible production, however the technical requirements are high, hard to accurately control, the parent material properties (toughness, impact properties, etc.), explosives properties (bursting speed stability, safety, etc.), the initial parameters (the quantity of explosives per unit area, the base compound plate spacing, etc.) and the dynamic parameters (collision angle, the compound plate collision speed, etc.) of the choice and system coordination of the composite plate of the finished product yield and quality has a direct impact.
The composite interface includes direct bonding area, melting layer and vortex. Atomic diffusion exists in the bonding interface, and severe plastic deformation with work hardening happens in the bonding zone. The bonding surface has a wavy structure, that is helpful to the improvement of bonding strength and tensile strength.
Explosive welding plate performance
Explosive welding explosive welding plate will not change the chemical composition and physical state of the original material, according to the actual needs of the composite material to become individually processed in to the required optimal state.
Explosive welding plate application performance is superb, can withstand cold, hot processing without changing the thickness of the combination of materials than the combination of composite materials is very high strength, usually higher than the low side of the combination of materials, that is unattainable by other technologies. The composite material will not delaminate or crack during subsequent heat treatment, leveling, cutting, rolling, spinning and other production.
For room temperature and 550 ? heat treatment of carbon steel surface layer (near the interface layer) has serious deformation brought on by fibrous tissue and many fine particles, the center of the organization of ferrite plus pearlite; stainless steel interface for your second phase of point-like organization, the center of the needle-like organization. But by 650 ? treatment of carbon steel samples near the interface section of small particles of the organization disappeared (that could occur decarburization), the grain becomes coarse, the center of the organization is still ferrite plus pearlite, but can not be seen in the organization of the slip line created by deformation; as well as in the stainless steel interface there are a large number of small black particles, titanium steel composite plate could be the decarburization of chromium carbide particles formed after the advantages of the fabric into a whole, giving full play to the usage of different metal materials, and greatly save rare and rare materials, and the usage of different metal materials. The use of performance greatly saves rare metal materials, thus lowering the production cost of equipment.
Weak demand and oversupply in Asia have pushed steelmakers in the area to develop supplies of low-carbon steel and iron, especially because the Jan. 31 reporting deadline for your European Union’s Carbon Boundary Adjustment Mechanism (CBAM) draws nearer, market participants said.
The situation is further complicated because other Western countries, namely the U.S., want to introduce similar policies.
A Singaporean trader said, “Asian steel producers have not slowed down production and want to increase output, therefore we expect capacity additions to outpace demand growth, particularly in the post-epidemic recovery period.” . “…… Products need to go somewhere. Producers can export to Europe, but this means they need to offer low-carbon products at huge discounts.”
Asia’s path to decarbonization has seen a number of breakthroughs, particularly as policymakers have committed to various climate targets and dealt with public and private stakeholders to build up low-carbon technologies.
These investments have enabled steelmakers to discover commercially viable technologies and reliable causes of clean energy, namely direct reduction of iron from scrap or gas, or shifting to electric arc furnace steelmaking, which has a lower carbon intensity when compared with blast furnaces.
Paolo Frediani, senior analyst at Fastmarkets, said the market is reacting to the steadily growing demand for green steel, given the quantity of pipeline investment.
“CBAM will surely give a major boost [in developing a green steel supply chain], but despite the advanced regulating steel emissions in Europe, the green steel premium is largely supported because increasingly more end-users are trying to reduce their overall carbon footprint,” says Frediani. “Although this drive is stronger in some regions than the others, it really is being a global phenomenon.”
Explosive composite explosion welding advantages
Explosive composite this new process, new technology in a short period of time to obtain rapid development and wide application, the main reason is it has the following four advantages:
(1) A number of composite materials could be combined it can make the melting point, strength, coefficient of thermal expansion and other performance differences are incredibly disparate metal combinations to accomplish composite. Such as aluminum – steel, titanium – steel. At present has realized the composite material combination of over 300 kinds, that is incomparable to other methods.
(2) Excellent material properties
Composite plate of the general design principle would be to meet the mechanical properties of the structure of the base material, compound plate to satisfy the corrosion or wear resistance and other properties. Therefore, in comparison with a single metal plate, the composite plate makes full use of the best performance of the substrate, and the compound plate not just has the required high strength but also has excellent corrosion resistance, wear resistance, and other properties of high production efficiency.
(3) High production efficiency/high bond strength.
Explosive composite in a very short period of time, and can be welded spanning a large area, a place as high as 20 square meters or even more, within the composite interface, dissimilar metals with the metal bond to accomplish inter-atomic bonding is generally not under the a minimum of the effectiveness of the composite material constituting the respective parent body.
(4) Good economy
The use of explosion welding technology to create composite plate products have both corrosion resistance of the compound layer and other functional characteristics and both the effectiveness of the grass-roots level and plastic toughness indicators, it can save you precious metal resources, reduce costs.
Use of explosive welding plate
Composite materials created by the explosive welding method continues to be commonly used in petroleum, chemical, shipbuilding, electronics, electric power, metallurgy, machinery, aerospace, atomic energy and other industrial fields. The composite plate is carbon steel being a substrate, single-sided or multi-faceted with precious metals being a double layer of high-efficiency energy-saving new composite materials, composite by explosion welding of special processing technology, both using the corrosion resistance of precious metals, wear resistance, but also with carbon steel, good weldability, molding, extensibility, thermal conductivity; explosive welding plate is now commonly used within the petrochemical industry, metallurgy, salt production and alkali production, the water industry, Nuclear industry.
Shipbuilding
In shipbuilding, explosive welding plates may be used to manufacture hull structures, decks, bulkheads, etc. Due to its high strength and good corrosion resistance, the explosive welding plate can effectively improve the durability and repair life of the ship.
Aerospace
In the aerospace field, explosive welding composite plates may be used to manufacture airplane fuselage, wings, engine parts, etc. Due to its good thermal stability and high strength, explosive welding composite plate can improve the performance and safety of aircraft.
Construction Industry
In the construction industry, explosive welding composite plates may be used to manufacture structural parts for bridges, high-rise buildings, highways, and so forth. Due to its high strength and good corrosion resistance, explosive welding composite plate can improve the safety and repair life of buildings.
Automobile manufacturing
In automobile manufacturing, explosive welding composite plates may be used to manufacture body structural parts, engine parts, and so forth. Due to its lightweight, high strength, and good thermal stability, the explosive welding plate can improve the performance and safety of automobiles.
Explosive welding plate cladding of metals supplier
Luoyang Trunnano Tech Co., Ltd has been a professional in cladding metal solutions for 10 years. This is a professional company with supply and marketing integration.
We provide different kinds of the cladding of metals, like nickel series clad plate, stainless steel series clad plate, aluminum series clad plate, copper series clad plate, refractory metal series clad plate, zirconium clad plate, niobium steel clad plate,Tantalum steel Clad Plate,Titanium Clad Copper etc.
We have a professional technical department and quality supervision department, a well-equipped laboratory with advanced testing equipment, as well as an after-sales customer support center. Send us an email to [email protected] or click on the needed products to deliver an inquiry.