What is Explosive Welding Plates?
Clad Steel Plate, that is, the metal composite plate produced by the explosive welding method (explosion welding method), explosive welding plate generally means the explosion from the metal composite plate. An explosive welding composite plate is a type of composite material plate manufactured by utilizing explosive forming technology, along with its manufacturing process involves multiple steps such as explosive forming, metal composite, and surface treatment.
Metal explosive welding technology is really a composite material processing technology that utilizes the large energy generated by the instantaneous generation of explosives to instantly composite two or more kinds of similar or dissimilar materials together, and this technology can weld metals with different properties, especially those which 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 a lot higher than the yield strength from the metal material;
(3) The bonding area shows wave-like metallurgical bonding characteristics;
Explosive welding composite plate history
Explosive composite discovery is definitely 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 from the explosion and was welded together. Actually, in World War II, individuals the repair of wounded tanks, but also often discovered that tilted impact to the tank on the shrapnel will be firmly welded to the tank armor phenomenon, just during the war people have virtually no time to analyze it.
In 1947, the Siberian branch from the Soviet Academy of Sciences, the famous scientists M.A. Lavrentsev in study regarding polymer bombs to penetrate the armor also found this phenomenon, within his dissertation formally referred to as “explosive welding”.
In the field of welding, the welding of different materials, such as steel and aluminum, steel and copper, is technically very difficult. And huge welding depth of welding is also very difficult, if you want to use conventional welding, shielding welding as well as other welding methods will be two 40mm thick wide plate welded right 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 really a composite plate manufacturing method that combines one or even more materials right into a single piece using explosives as the energy source. Following the explosion of explosives, the blast products form a higher-pressure pulse load, directly working on the compound plate, promoting the top-speed movement from the compound plate, within the collision reason for the compound plate and the substrate tilt collision, accompanied by violent plastic deformation and the formation from the jet, the jet eliminates the surface of the contamination layer, so the welded metal flat plate having a clean surface in contact with each other at high temperatures and pressures, the 2 kinds of plate will realize the strong metallurgical bonding.
Explosive welding composite plate-specific production methods:
1. Explosion molding
Explosion molding is the initial 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 will be pushed to the opposite side from the metal plate mold, so the metal plate instantly to get the desired size and shape. This forming method is characterized by high precision and efficiency.
2. Metal composite
In the explosion molding, the need for metal composite. This step is usually utilized in explosion welding or explosion crimping as well as other methods, two or more metal plates with the explosion energy combined together to create a composite material. Throughout the metal composite process, a metallurgical reaction occurs between different metals, forming a powerful metallurgical bond.
3.Surface treatment
Surface therapy is usually required to enhance the surface quality and corrosion resistance from the explosive welding plate. Widely used surface treatment methods include spraying, plating, chemical plating and so forth. These methods can increase the wear resistance, corrosion resistance and aesthetics from the composite plate.
Explosive welding composite plate production process, although simple, flexible production, however the technical requirements are high, difficult 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.) from the choice and system coordination from the composite plate from the finished product yield and quality has a direct impact.
The composite interface includes direct bonding area, melting layer and vortex. Atomic diffusion exists at the bonding interface, and severe plastic deformation with work hardening happens in the bonding zone. The bonding surface has a wavy structure, that is beneficial to the improvement of bonding strength and tensile strength.
Explosive welding plate performance
Explosive welding explosive welding plate is not going to alter the chemical composition and physical state from the original material, according to the actual needs from the composite material to become individually processed into the required optimal state.
Explosive welding plate application performance is very good, can withstand cold, hot processing without changing the thickness from the combination of materials compared to the combination of composite materials is very high strength, usually higher than the low side from the combination of materials, that is unattainable by other technologies. The composite material is not going to delaminate or crack during subsequent heat treatment, leveling, cutting, rolling, spinning as well as 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 several fine particles, the heart from the organization of ferrite plus pearlite; stainless steel interface for your second phase of point-like organization, the heart from the needle-like organization. But by 650 ? treatment of carbon steel samples near the interface section of small particles from the organization disappeared (that could occur decarburization), the grain becomes coarse, the heart from the organization continues to be ferrite plus pearlite, but could not be seen in the business from the slip line produced by deformation; and 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 benefits of the material right into a whole, giving full play to the use of different metal materials, and greatly save rare and rare materials, and the use of different metal materials. The usage 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 region to develop supplies of low-carbon steel and iron, especially as the Jan. 31 reporting deadline for your European Union’s Carbon Boundary Adjustment Mechanism (CBAM) draws nearer, market participants said.
The problem is further complicated by the fact that 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, so we expect capacity additions to outpace demand growth, particularly in the post-epidemic recovery period.” . “…… Products have to go somewhere. Producers can export to Europe, but this means they need to offer low-carbon products at competitive prices.”
Asia’s way to decarbonization has seen several breakthroughs, particularly as policymakers have committed to various climate targets and worked with public and private stakeholders to develop low-carbon technologies.
These investments have enabled steelmakers to explore commercially viable technologies and reliable causes of clean energy, namely direct decrease in iron from scrap or natural gas, or shifting to electric arc furnace steelmaking, which has a lower carbon intensity compared to 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 regulation of steel emissions in Europe, the green steel premium is largely supported by the fact that increasingly more end-users are trying to reduce their overall carbon footprint,” says Frediani. “Although this drive is stronger in certain 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 time to acquire rapid development and wide application, the main reason is that it has the following four advantages:
(1) A number of composite materials could be combined it will make the melting point, strength, coefficient of thermal expansion as well as other performance differences are extremely disparate metal combinations to accomplish composite. Like aluminum – steel, titanium – steel. Currently has realized the composite material combination of more than 300 kinds, that is incomparable with other methods.
(2) Excellent material properties
Composite plate from the general design principle would be to meet the mechanical properties from the structure from the base material, compound plate to satisfy the corrosion or wear resistance as well as other properties. Therefore, in comparison with a single metal plate, the composite plate makes full use of the best performance from the substrate, and the compound plate not only has the required high strength but also has excellent corrosion resistance, wear resistance, as well as other properties of high production efficiency.
(3) High production efficiency/high bond strength.
Explosive composite in a very short time, and may 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 normally not less than the a minimum of the strength of the composite material constituting the respective parent body.
(4) Good economy
The usage of explosion welding technology to create composite plate products have both corrosion resistance from the compound layer as well as other functional characteristics and both the strength of the grass-roots level and plastic toughness indicators, it can save you precious metal resources, reduce costs.
Application of explosive welding plate
Composite materials produced by the explosive welding method continues to be widely used in petroleum, chemical, shipbuilding, electronics, electric power, metallurgy, machinery, aerospace, atomic energy as well as other industrial fields. The composite plate is carbon steel as a substrate, single-sided or multi-faceted with precious metals as 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 widely 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. Because of its high strength and good corrosion resistance, the explosive welding plate can effectively enhance the durability and repair life from the ship.
Aerospace
In the aerospace field, explosive welding composite plates may be used to manufacture airplane fuselage, wings, engine parts, etc. Because of its good thermal stability and strength, explosive welding composite plate can enhance 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. Because of its high strength and good corrosion resistance, explosive welding composite plate can enhance 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. Because of its lightweight, high strength, and good thermal stability, the explosive welding plate can enhance 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 types of the cladding of metals, such as 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 properly-equipped laboratory with advanced testing equipment, and an after-sales customer support center. Send us an email to [email protected] or click on the needed products to deliver an inquiry.