In gas shielded arc welding, both the arc and the molten puddle are covered by a shield of inert gas. Taking the explosion out of explosion welding american. As any other welding process, it complies with well understood, reliable principles. In explosive welding, strong metallurgical bonds can be produced between metal combinations which cannot be welded by other methods or processes. This clad plate is typically used in the chemical and petrochemical industries as tube sheet for heat exchangers. The atlas cf flange is metallurgically bonded using an explosion welding process exw. This book is designed to meet the requirement of revised syllabus prescribed by the anna university. For example, tantalum can be explosively welded to steel although the welding point of tantalum is higher than the vaporization temperature of steel. Explosive welding of aluminum, titanium and zirconium to copper sheet metal. Its major advantage lies in that it does not suffer from the limitations imposed on other welding processes by their specific characteristics. Explosive welding pdf the purpose of explosive welding.
Introduction explosive welding is a solid state metal joining. Our expertise allows us to bond most metals, either directly or utilizing interlayers. Solid state welding are those welding process in which no external heat is applied or no molten or plastic state involves. Utilizing the explosive welding process, hemi can join a wide variety of dissimilar metals with a metallurgical bond.
Influence of explosive welding parameters on properties of bimetal. Explosives used for welding high velocity 1475025000 fts trinitrotoluene tnt cyclotrimethylenetrinitramine rdx pentaerythritol tetranitrate petn composition b composition c4 primacord low to medium velocity 490014750 fts ammonium nitrate ammonium nitrate sensitized with fuel oil ammonium perchlorate. Explosion welding is a solidstate process that produces a high velocity interaction of dissimilar metals by a controlled detonation. I need to check the ligament efficiency of the tubesheet in order to determine if it can handle the forces imposed by the welding process. Lead arc welding of a forged steel cupandcross tiedown assembly into an aluminum aircraft carrier deck plate. Explosion bonding or explosion cladding or explosion welding is a technically based industrial welding process. Explosion welding of metals is a process of great technological significance in terms of modern metal composites manufacturing possibilities nevertheless.
Apr 06, 2017 today we will learn about friction welding principle, working, types, application, advantages and disadvantages with its diagram. Explosive welding tei yimpact provides tube plugging, tube expansion, tubetotube sheet welding for heat exchanger users and manufacturers, and debris removal from industrial plant by the use of controlled explosive charges. Archived from the original pdf on 20070411 explosion welding of dissimilar metals. Flange blanks are then cut from the bonded plate using a waterjet. This is the welding industrys comprehensive reference on safety. Cladding metal or cladder is the thinner plate that is either in direct contact with the explosive, or is shielded by a flyer plate from the explosive. Flyer plate is a sacrificial plate placed between the cladder and the explosive to protect the cladder metal. The surfaces to be joined are brought together at very high speed. The process of explosive cladding, or explosive metal welding, has been understood for decades. This book is written to serve the needs of under graduate students embarking introductory course in welding technology. Klas weman, in welding processes handbook second edition, 2012. Explosive welding pdf explosive welding is a solid state metal joining process used to create a metallurgical bond between two similar or dissimilar metals 1.
The lower plate is laid on a firm surface, such as a heavier steel plate. Today we will learn about friction welding principle, working, types, application, advantages and disadvantages with its diagram. Because explosive welding is a coldweld process, the metals. Each of the above type of welding can be further classified depending on other micro level characteristics. The explosive welding process explosively bonded metals applications. Explosive welding pdf explosive welding pdf download direct download. Effect of explosive characteristics on the explosive welding of. Study on explosive welding of ta2 titanium to q235 steel. The explosive welding technique has found major use for cladding low cost plate usually carbon steel with more expensive corrosion resistant materials. May 05, 2016 explosion welding is slowly being replaced with other methods because it does raise several safety concerns.
Welding revo technologies and enterprisesan iso 9001. New explosive welding technique to weld springerlink. Explosive welding differs from other traditional joining processes as it does not depend on melting of two metals to be joined, or on plastic deformation of the surfaces in contact as occurs with cold or hot pressure welding. Explosion welding exw is a solid state solidphase process where welding is accomplished by accelerating one of the. Aluminium can be welded to copper and stainless steel to brass.
In simple terms an explosive weld is achieved by impelling the cladding plate against the substrate plate material using. Explosive welding of metals in a vacuum environment smt holland. Each of the bores 11 has a circular tube 12 received therein, the tube 12 on the left being illustrated in the approximate axial position for welding to the inner wall of the associated bore 11, the tube 12 in the center being fitted with an expendable explosive device 14 formed in accordance with the invention and ready for the explosive. For industrial explosive welding, it usually consumes several tons of explosive by one shot. Seminar on underwater welding report and ppt download. Gas welding this chapter discusses equipment and materials used in gas welding. At tnopml several of the explosive welding configurations that were. Wave formed at the interface obtained by explosive welding. Fusion welding in fusion welding or non pressure welding, the material at the joint is heated to molten state and allowed to solidify.
This technique produces a weld joint by a highspeed oblique collision on the order of several hundred meters per. Explosive welding takes place when two plates are impacted together under an explosive force at high velocity. Numerical simulation of explosive welding using smoothed particle hydrodynamics method smoothed particle hydrodynamics method and concluded that explosive welding can sph also be regarded as diffusion welding, fusion welding and pressure welding. Explosive welding tubes to tubesheet welding, bonding. Radiant energy welding electron beam welding laser welding. The explosive welding process is one of the most useful and widely employed applications of the high energy rate methods to the fabrication of materials.
The process uses an explosive detonation as the energy source to produce a metallurgical bond between metal components. Explosive welding free download as powerpoint presentation. Explosive welding article about explosive welding by the. Im looking at using the explosive welding technique to weld a tube bundle to a tubesheet or header for feedwater heaters. Explosive welding pdf welding explosive material scribd. In plastic welding or pressure welding, the pieces of metal to be joined are heated to plastic state and then forced together by external pressure. Explosive welding is a specialised process used for lap joints in difficult to weld metals and their combinations. Explosive welding download pdf info publication number us3024526a. Good day, im looking at using the explosive welding technique to weld a tube bundle to a tubesheet or header for feedwater heaters. In 70s, the explosive welding was intensively used in attempts to develop an economically effective fabrication. Pdf study of the explosive welding process and applications. First off, the process itself can be very dangerous. Soldering oxyacetylene welding max temperature reached. Explosion welding, technical growth and commercial history pdf.
Warning these slides have not been extensively proofread, and therefore may contain errors. This base material is often unalloyed or low alloy carbon steel. Examples are sheets used for shells and bases in the. Scribd is the worlds largest social reading and publishing site. For example, explosion welding is conducted by spreading a chemical explosive on one of the metals that need to be joined. This process is most commonly utilized to clad carbon steel plate with a thin layer of corrosion resistant material e. The phenomenon, discovered by lavrentiev at the end of the ww ii 122, is an efficient way to bond together two similar or dissimilar materials. Pdf explosive welding or cladding is usually performed on relative thick plates by means of a large scale parallel plate setup. Effect of explosive characteristics on the explosive. Explosive welding of aluminium to stainless steel sciencedirect explosive welding of tin ppt video online download taking the explosion out of explosion welding american welding. What is explosive welding and in what applications is it. Explosion welding of larger pieces must be performed at specially designated sites. Explosion welding exw is a solid state solidphase process where welding is accomplished by accelerating one of the components at extremely high velocity through the use of chemical explosives.
What is explosive welding and in what applications is it used. In practice, regular use is made of aggressive reagents, to which normal steel qualities offer insufficient resistance. In explosive welded plates at the collision point, the perfectly clean surfaces are brought together under very high pressure. Twenty years have passed since explosive welding was first commercialized. Although academia has acknowledged explosive welding as a novel and fascinating process, with several specific exceptions, industry has been slow to realize its potential and the possible composites that it makes available. E xplosively bonded metals can be used as weldable transitions between two dissimilar metals. The problem over the last 30 years heat exchangers have been subject to increasingly stressful conditions. This is when the commercialization of explosive welded plates began. The interfacial zone at the welded interface is composed of a fine eutectic structure of aluminum and fe 4 al, and the explosive welding process of this metal combination proceeds mainly by intensive deformation of the aluminum alloy.
Explosive simulation with hydrocodes warhead, shaped charge, linear shaped charge. Pdf examination of copperstainless steel joints formed by. Gas welding and cutting oxyfuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by application of heat created by gas flame. The upper plate is placed carefully at an angle of approximately.
Mechanical, civil, chemical, and other engineers present 50 papers on such topics as welding a supersonic solidstate detonation in an overdriven porous mixture of aluminum and teflon, hightemperature elastic properties of refractory materials, energy dissipation in the explosive welding of dissimilar metals, a newly developed unsteady wave sensing system for polycarbonate, the behavior of. Seminar on underwater welding report and ppt download introduction to underwear welding underwater welding is an important tool for underwater fabrication works. Explosive welding or cladding is usually performed on relative thick plates by means of a large scale parallel plate setup. A completely new method of welding which employs high explosives is briefly described and explained in terms of the principle used in the hollow charge, which wm developed during days of war to. This book is a compendium of monographic contributions, each. Explosive welding an overview sciencedirect topics. Explosion welding exw is a solid state solidphase process where welding is accomplished. Explosion welding is slowly being replaced with other methods because it does raise several safety concerns. Vander willingena in recent years the number of offshore structures including oil drilling rigs, pipelines, platforms are being installed significantly. This document is a must for every welding school, fabricator and home hobbyist. Explosive welding process, joining of dissimilar materials.
Explosive welding can be considered as a kind of hotpressing. Fundamentals of gas cutting and welding ced engineering. Sundaravalli, suchitra publications the book welding technology for engineering and technology studies. Explosive welding technique is one of the most promising solidstate welding methods for producing laminated composite materials, which are widely applied in both chemical and nuclear industries due to their good corrosion resistances and mechanical properties. Numerical simulation of explosive welding using smoothed. Nuhgraha, 23711 roy faizal, 23711007 ethys pranoto, 23111024220120 1 2. In 1946, special waterproof electrodes were developed in holland by e. The structure near the interface of bimetallic strips strongly influences their properties.
Sep 15, 2016 explosion cladding is a solid state welding process that uses precision explosions to bond two dissimilar metals while retaining the mechanical, electrical and corrosion properties of both. Explosion cladding is a solid state welding process that uses precision explosions to bond two dissimilar metals while retaining the mechanical, electrical and corrosion properties of both. Aluminium and copper can be welded to stainless steel, aluminium to nickel alloys, and stainless steel to nickel. The weldable region for various aluminum alloys is decided by the change in collision velocity and kinetic. Energetics and detonics department of mechanical engineering, university of coimbra, rua luis reis santos, polo ii, 3030. Explosion welding develops an extremely high pressure for a short time. Jan 22, 20 explosion welding is a solidstate process that produces a high velocity interaction of dissimilar metals by a controlled detonation slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Examination of copperstainless steel joints formed by explosive welding article pdf available in materials and design 266. The mechanism of explosive welding is closely associated with that of sha. In recent years the number of offshore structures including oil drilling rigs, pipelines, platforms are being installed significantly. In this work, the initial dust concentration in the explosion vessel is 0. Pdf examination of copperstainless steel joints formed. Thermochemical welding thermit welding atomic h 2 welding 6. This is a pdf file of an unedited manuscript that has been accepted for.