What is Explosive Welding Plates?

Clad Steel Plate, which is, the metal composite plate created by the explosive welding method (explosion welding method), explosive welding plate generally refers to the explosion from the metal composite plate. An explosive welding composite plate is a kind of composite material plate manufactured by utilizing explosive forming technology, and its manufacturing process involves multiple steps like explosive forming, metal composite, and surface treatment.

Metal explosive welding technology is really a composite material processing technology that utilizes the huge energy generated from the instantaneous generation of explosives to instantly composite 2 or more kinds of similar or dissimilar materials together, and this technology can weld alloys with different properties, particularly those which are not dissolved, into one piece.

Compared with the direct rolling composite method:

(1) loading speed, which is, the loading process is instantaneous ;

(2) Applied to 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 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. In fact, in World War II, individuals the repair of wounded tanks, but additionally often discovered that tilted impact to the tank around the shrapnel is going to be firmly welded to the tank armor phenomenon, just during the war people have no time to analyze it.

In 1947, the Siberian branch from the Soviet Academy of Sciences, the famous scientists M.A. Lavrentsev in the study of polymer bombs to penetrate the armor also found this phenomenon, in his dissertation formally referred to as “explosive welding”.

In the field of welding, the welding of various materials, like steel and aluminum, steel and copper, is technically very hard. And large welding depth of welding can also be very hard, if you want to use conventional welding, shielding welding as well as other welding methods is going to be two 40mm thick wide plate welded into a 80mm thick wide plate, it is estimated that no one will do. However, the explosive welding is ideal to resolve the two problems at the same time.

Explosive welding composite plate principle production method
Explosive welding is really a composite plate manufacturing method that mixes one or more materials 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 high-speed movement from the compound plate, in the collision reason for the compound plate as well as the substrate tilt collision, accompanied by violent plastic deformation as well as the formation from the jet, the jet takes away the surface of the contamination layer, so that the welded metal flat plate with a clean surface in contact with each other 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 initial step in 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 from the metal plate mold, so that the metal plate instantly to achieve the desired shape and size. This forming method is described as high precision and high 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, 2 or more metal plates through the explosion energy combined together to form a composite material. During 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 options include spraying, plating, chemical plating and so on. These techniques can boost the wear resistance, corrosion resistance and aesthetics from the composite plate.

Explosive welding composite plate production process, although simple, flexible production, but 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 amount of explosives per unit area, the base compound plate spacing, etc.) as well as 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 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 is not going to change the chemical composition and physical state from the original material, according to the actual needs from 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 from the combination of materials than 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 management of carbon steel surface layer (close to the interface layer) has serious deformation caused by fibrous tissue and many fine particles, the center from the organization of ferrite plus pearlite; stainless steel interface for the second phase of point-like organization, the center from the needle-like organization. But by 650 ? management of carbon steel samples close to the interface section of small particles from the organization disappeared (that may occur decarburization), the grain becomes coarse, the center from the organization is still ferrite plus pearlite, but can not seen in the organization from 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 benefits of the fabric 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 use of performance greatly saves rare metal materials, thus reducing 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 as the Jan. 31 reporting deadline for the 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., are looking to introduce similar policies.

A Singaporean trader said, “Asian steel producers have not slowed down production and are looking 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 huge discounts.”

Asia’s way to decarbonization has already seen several breakthroughs, particularly as policymakers have focused on various climate targets and dealt 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 reduction of iron from scrap or gas, or shifting to electric arc furnace steelmaking, that features 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 amount of pipeline investment.

“CBAM will certainly provide a major boost [in creating a green steel supply chain], but regardless of 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. “While this drive is stronger in certain regions than the others, it is becoming 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 primary reason is that it has got the following four advantages:

(1) A number of composite materials could be combined it can make the melting point, strength, coefficient of thermal expansion as well as other performance differences are incredibly disparate metal combinations to accomplish composite. Such as aluminum – steel, titanium – steel. Currently has realized the composite material combination of more than 300 kinds, that is incomparable to 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 meet the corrosion or wear resistance as well as other properties. Therefore, in comparison with just one metal plate, the composite plate makes full utilisation of the best performance from the substrate, as well as the compound plate not only has got the required high strength but additionally 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 period of time, and may be welded spanning a large area, an area as high as 20 square meters or more, in the composite interface, dissimilar metals through the metal bond to accomplish inter-atomic bonding is normally 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 produce composite plate products have both the corrosion resistance from the compound layer as well as other functional characteristics and both the effectiveness of the grass-roots level and plastic toughness indicators, you can save precious metal resources, reduce costs.

Application 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 as well as 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 with the corrosion resistance of precious metals, wear resistance, but additionally with carbon steel, good weldability, molding, extensibility, thermal conductivity; explosive welding plate is now commonly used in the petrochemical industry, metallurgy, salt production and alkali production, the water industry, Nuclear industry.

Shipbuilding
In shipbuilding, explosive welding plates can be used to manufacture hull structures, decks, bulkheads, etc. Due to 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 can be used to manufacture airplane fuselage, wings, engine parts, etc. Due to its good thermal stability and high strength, explosive welding composite plate can enhance the performance and safety of aircraft.

Construction Industry
In the construction industry, explosive welding composite plates can be used to manufacture structural parts for bridges, high-rise buildings, highways, and so on. Due to 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 can be used to manufacture body structural parts, engine parts, and so on. Due to 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 become a professional in cladding metal solutions for 10 years. This is a professional company with supply and marketing integration.

We offer 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 service center. Send us an e-mail to [email protected] or click on the needed products to deliver an inquiry.