By TRUNNANO | 22 December 2023 | 0 Comments
What is the explosive welding cladding of metal plates?
Gold prices rose on Thursday as the dollar retreated after U.S. economic data raised expectations that the Federal Reserve will cut interest rates next March.
The data showed that U.S. gross domestic product grew at an annualized rate of 4.9 percent last quarter, a downward revision from the previously reported 5.2 percent, while weekly jobless claims rose slightly. "Gold prices rose on somewhat weaker GDP data. The market is eager for the Fed to turn quickly,"
According to the tool, the market expects an 83% likelihood of a Fed rate cut in March, compared to 79% before the data was released.
Lower rates reduce the opportunity cost of holding non-yielding gold. The U.S. dollar fell 0.5 percent, and the 10-year Treasury yield hovered near a five-month low.
"Gold prices will remain above the $2,000 level, and our expectation of lower inflationary pressures will continue to promote sideways gold prices."
Silver rose 0.9 percent to $24.33 an ounce, touching a 16-day high.
Platinum rose 0.4 percent to $962.82, near a 16-week high in the previous session, while palladium gained 1.3 percent to $1,211.71.
In a research note on Wednesday, Bank of America said, "Platinum has stronger fundamentals and should continue to outperform palladium going forward."
Bank of America expects palladium surpluses to increase in the base case next year, and prices could fall to as low as $500 an ounce if supply does not decrease.
What is the explosive welding plates？
Explosive welding composite plate, that is, the metal composite plate produced 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 such as 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 two or more kinds of similar or dissimilar materials together, and this technology can weld metals with different properties, especially 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) Applied to 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 pieces of 1-inch diameter, thickness of 0.035 inches of thin brass discs, due to 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 on the shrapnel will be firmly welded to the tank armor phenomenon, just during the war people have no time to study it.
In 1947, the Siberian branch of 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 different materials, such as steel and aluminum, steel and copper, is technically very difficult. And large welding depth of welding is also very difficult, if you want 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 is estimated that no one will 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 combines one or more materials into a single piece using explosives as the energy source. After the explosion of explosives, the blast products form a high-pressure pulse load, directly acting on the compound plate, promoting the high-speed movement of the compound plate, in the collision point of 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 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.
The data showed that U.S. gross domestic product grew at an annualized rate of 4.9 percent last quarter, a downward revision from the previously reported 5.2 percent, while weekly jobless claims rose slightly. "Gold prices rose on somewhat weaker GDP data. The market is eager for the Fed to turn quickly,"
According to the tool, the market expects an 83% likelihood of a Fed rate cut in March, compared to 79% before the data was released.
Lower rates reduce the opportunity cost of holding non-yielding gold. The U.S. dollar fell 0.5 percent, and the 10-year Treasury yield hovered near a five-month low.
"Gold prices will remain above the $2,000 level, and our expectation of lower inflationary pressures will continue to promote sideways gold prices."
Silver rose 0.9 percent to $24.33 an ounce, touching a 16-day high.
Platinum rose 0.4 percent to $962.82, near a 16-week high in the previous session, while palladium gained 1.3 percent to $1,211.71.
In a research note on Wednesday, Bank of America said, "Platinum has stronger fundamentals and should continue to outperform palladium going forward."
Bank of America expects palladium surpluses to increase in the base case next year, and prices could fall to as low as $500 an ounce if supply does not decrease.
What is the explosive welding plates？
Explosive welding composite plate, that is, the metal composite plate produced 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 such as 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 two or more kinds of similar or dissimilar materials together, and this technology can weld metals with different properties, especially 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) Applied to 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 pieces of 1-inch diameter, thickness of 0.035 inches of thin brass discs, due to 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 on the shrapnel will be firmly welded to the tank armor phenomenon, just during the war people have no time to study it.
In 1947, the Siberian branch of 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 different materials, such as steel and aluminum, steel and copper, is technically very difficult. And large welding depth of welding is also very difficult, if you want 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 is estimated that no one will 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 combines one or more materials into a single piece using explosives as the energy source. After the explosion of explosives, the blast products form a high-pressure pulse load, directly acting on the compound plate, promoting the high-speed movement of the compound plate, in the collision point of 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 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 first step in the manufacture 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 of the metal plate mold, so that the metal plate in an instant to achieve the desired shape and size. This forming method is characterized by high precision and high efficiency.
2. Metal composite
In the explosion molding, the need for metal composite. This step is usually used in explosion welding or explosion crimping and other methods, two 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 strong metallurgical bond.
3.Surface treatment
Surface treatment is usually required to improve the surface quality and corrosion resistance of the explosive welding plate. Commonly used surface treatment methods include spraying, plating, chemical plating and so on. 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, 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.) 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 consists of direct bonding area, melting layer and vortex. Atomic diffusion exists at the bonding interface, and severe plastic deformation with work hardening occurs in the bonding zone. The bonding surface has a wavy structure, which is beneficial to the improvement of bonding strength and tensile strength.
1. Explosion molding
Explosion molding is the first step in the manufacture 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 of the metal plate mold, so that the metal plate in an instant to achieve the desired shape and size. This forming method is characterized by high precision and high efficiency.
2. Metal composite
In the explosion molding, the need for metal composite. This step is usually used in explosion welding or explosion crimping and other methods, two 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 strong metallurgical bond.
3.Surface treatment
Surface treatment is usually required to improve the surface quality and corrosion resistance of the explosive welding plate. Commonly used surface treatment methods include spraying, plating, chemical plating and so on. 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, 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.) 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 consists of direct bonding area, melting layer and vortex. Atomic diffusion exists at the bonding interface, and severe plastic deformation with work hardening occurs in the bonding zone. The bonding surface has a wavy structure, which is beneficial 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 be individually processed into the required optimal state.
explosive welding plate application performance is very good, 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 lower side of the combination of materials, which 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 caused by fibrous tissue and many fine particles, the heart of the organization of ferrite plus pearlite; stainless steel interface for the second phase of point-like organization, the heart of the needle-like organization. But by 650 ℃ treatment of carbon steel samples near the interface area of small particles of the organization disappeared (that may occur decarburization), the grain becomes coarse, the heart of the organization is still ferrite plus pearlite, but can not be seen in the organization of 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 may 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 reducing 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 as 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., 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, especially in the post-epidemic recovery period." . "...... Products have to go somewhere. Producers can export to Europe, but that means they have to offer low-carbon products at competitive prices."
Asia's path to decarbonization has already seen a number of 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 sources of clean energy, namely direct reduction of 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 amount of pipeline investment.
"CBAM will certainly provide 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 more and more end-users are trying to reduce their overall carbon footprint," says Frediani. "While this drive is stronger in some regions than 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 main reason is that it has the following four advantages:
(1)A variety of composite materials can be combined
it can make the melting point, strength, coefficient of thermal expansion and other performance differences are extremely disparate metal combinations to achieve composite. Such as 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 of the general design principle is to meet the mechanical properties of the structure of the base material, compound plate to meet 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 of the substrate, and 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 very short period of time, and can be welded over 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 generally not less than the minimum of the strength 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 of 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.
Application of explosive welding plate
Composite materials produced by the explosive welding method has been widely 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 with 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 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 improve the durability and service life of 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 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. Due to 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. 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. It is a professional company with supply and marketing integration.
We provide different kinds 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 well-equipped laboratory with advanced testing equipment, and an after-sales customer service center. Send us an email to [email protected] or click on the needed products to send an inquiry.d
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 be individually processed into the required optimal state.
explosive welding plate application performance is very good, 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 lower side of the combination of materials, which 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 caused by fibrous tissue and many fine particles, the heart of the organization of ferrite plus pearlite; stainless steel interface for the second phase of point-like organization, the heart of the needle-like organization. But by 650 ℃ treatment of carbon steel samples near the interface area of small particles of the organization disappeared (that may occur decarburization), the grain becomes coarse, the heart of the organization is still ferrite plus pearlite, but can not be seen in the organization of 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 may 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 reducing 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 as 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., 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, especially in the post-epidemic recovery period." . "...... Products have to go somewhere. Producers can export to Europe, but that means they have to offer low-carbon products at competitive prices."
Asia's path to decarbonization has already seen a number of 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 sources of clean energy, namely direct reduction of 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 amount of pipeline investment.
"CBAM will certainly provide 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 more and more end-users are trying to reduce their overall carbon footprint," says Frediani. "While this drive is stronger in some regions than 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 main reason is that it has the following four advantages:
(1)A variety of composite materials can be combined
it can make the melting point, strength, coefficient of thermal expansion and other performance differences are extremely disparate metal combinations to achieve composite. Such as 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 of the general design principle is to meet the mechanical properties of the structure of the base material, compound plate to meet 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 of the substrate, and 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 very short period of time, and can be welded over 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 generally not less than the minimum of the strength 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 of 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.
Application of explosive welding plate
Composite materials produced by the explosive welding method has been widely 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 with 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 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 improve the durability and service life of 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 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. Due to 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. 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. It is a professional company with supply and marketing integration.
We provide different kinds 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 well-equipped laboratory with advanced testing equipment, and an after-sales customer service center. Send us an email to [email protected] or click on the needed products to send an inquiry.d
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