Exactly what is Explosive Welding Plates?

Nickel Plated Copper Sheet, 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 using explosive forming technology, along with 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 huge 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 alloys with various properties, especially those that are not dissolved, into one piece.

In comparison 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 greater 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) inside a dynamite explosion test, accidentally found two bits of 1-inch diameter, thickness of .035 inches of thin brass discs, due to the sudden impact from the explosion and was welded together. In fact, in World War II, people in 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 throughout the war individuals have virtually no time to study 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 known 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 huge welding depth of welding is also very hard, if you wish to use conventional welding, shielding welding and other welding methods will 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 two problems at the same time.

Explosive welding composite plate principle production method
Explosive welding is a composite plate manufacturing method that mixes one or more materials into a single piece using explosives because the energy source. Following the explosion of explosives, the blast products form a high-pressure pulse load, directly working on the compound plate, promoting the high-speed movement from the compound plate, in the collision point of 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 eliminates the top of the contamination layer, so the welded metal flat plate with 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 first 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 will be pushed to the other side from the metal plate mold, so the metal plate in an instant to get the desired size and shape. This forming technique is described as high precision and efficiency.

2. Metal composite
In the explosion molding, the need for metal composite. This task is generally utilized in explosion welding or explosion crimping and other methods, 2 or more metal plates through the explosion energy combined together to create a composite material. During the metal composite process, a metallurgical reaction occurs between different metals, forming a strong metallurgical bond.

3.Surface treatment
Surface treatment is usually required to improve the surface quality and corrosion resistance from the explosive welding plate. Widely used surface treatment methods 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, 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 first parameters (the quantity 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 consists of direct bonding area, melting layer and vortex. Atomic diffusion exists in the bonding interface, and severe plastic deformation with work hardening occurs in the bonding zone. The bonding surface has a wavy structure, which is helpful 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, based on the actual needs from the composite material to become individually processed into 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 greater than the lower side from the combination of materials, which is unattainable by other technologies. The composite material is not going to 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 caused by fibrous tissue and many fine particles, the heart from the organization of ferrite plus pearlite; stainless steel interface for the 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 may occur decarburization), the grain becomes coarse, the heart from the organization continues to be ferrite plus pearlite, but could not seen in the organization from the slip line created by deformation; as well as in the stainless steel interface you will find a lot of small black particles, titanium steel composite plate could be the decarburization of chromium carbide particles formed after the advantages of the material 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 lowering the production cost of equipment.

Weak demand and oversupply in Asia have pushed steelmakers in the region to build up supplies of low-carbon steel and iron, especially because the Jan. 31 reporting deadline for the European Union’s Carbon Boundary Adjustment Mechanism (CBAM) draws nearer, market participants said.

The situation 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, 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 have to offer low-carbon products at huge discounts.”

Asia’s path to decarbonization has seen several breakthroughs, particularly as policymakers have focused on various climate targets and dealt with public and private stakeholders to build up low-carbon technologies.

These investments have enabled steelmakers to explore commercially viable technologies and reliable sources 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 marketplace is reacting to the steadily growing demand for green steel, given the quantity of pipeline investment.

“CBAM will certainly 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. “While this drive is stronger in some regions than others, it really is being a global phenomenon.”

Explosive composite explosion welding advantages
Explosive composite this new process, new technology inside a short period of time to obtain rapid development and wide application, the primary reason is 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 and other performance differences are extremely disparate metal combinations to achieve composite. Like aluminum – steel, titanium – steel. At present has realized the composite material combination of more than 300 kinds, which is incomparable to other methods.

(2) Excellent material properties
Composite plate from the general design principle is to meet the mechanical properties from the structure from the base material, compound plate to satisfy the corrosion or wear resistance and other properties. Therefore, compared with a single metal plate, the composite plate makes full use of the best performance from the substrate, as well as the compound plate not only 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 really short period of time, and may be welded spanning a large area, an area of up to 20 square meters or more, in the composite interface, dissimilar metals through the metal bond to achieve inter-atomic bonding is normally not under the a minimum of the strength 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 the corrosion resistance from the compound layer and other functional characteristics and both the strength of the grass-roots level and plastic toughness indicators, you can save 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 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 currently 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. Because of its high strength and good corrosion resistance, the explosive welding plate can effectively improve the durability and service life from the ship.

Aerospace
In the aerospace field, explosive welding composite plates can be used to manufacture airplane fuselage, wings, engine parts, etc. Because of its good thermal stability and strength, explosive welding composite plate can improve 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. Because of its high strength and good corrosion resistance, explosive welding composite plate can improve the safety and service 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. Because of 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 become 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, 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.

There exists a professional technical department and quality supervision department, a properly-equipped laboratory with advanced testing equipment, as well as an after-sales customer service center. Send us an email to [email protected] or click the needed products to deliver an inquiry.