The beam is very narrow and the heat affected zone is minimized. It is capable of producing single pass, complete joint. Hello everyone welcome to engineers academy in this video we will learn the process of electron beam welding process ebw welding, its principle, working, equipments used, types. This article throws light upon the seven main equipments required for electron beam welding ebw. Ptr provides the technology to achieve the highest quality welds for the most. Electron beam welding is a liquid state welding process. The main applications for this high efficiency welding process are. Objective describe the basic mechanism of welding in ebw. Electron beam welding ebw and laser beam welding lbw are two very popular methods of joining multiple metallic components. Utilizing high voltage, the electrons are accelerated to between and 34 of the speed of light creating a highly concentrated energy beam. Joint preparation for electron beam welding thin aluminum alloy. Pdf electron beam welding features of cermet membranes. Electron beam welding was used for joining al6061t6, precision machined, cylindrical sections. This vacuum all but elimintats the introduction of impurtities.
Today we will learn about electron beam welding, principle, working, equipments, application, advantages and disadvantages with its diagram. Oct 31, 2014 electron beam welding is a fusion welding process in which a beam of highvelocity electrons is applied to the material to be joined. Feb 12, 2014 electron beam welding vs laser welding advantages and disadvantages by eb industries duration. Eb welding permits joining of reactive and refractive materials. Electron beam welding ebw has been developed for many years and is being. The extra material kept at the root of the weld can be machined off after. Reps for ebes beamer line of eb welding machines four decades of experience contact our sales department or a technical sta. Electron beam welding was founded in 1966 by a dedicated group of metallurgists and engineers. Modern age demand for flexible design and high quality structures. It is capable of producing single pass, complete joint penetration welds in steels up to 200 mm. The reputation of electron beam welding llc for excellence and competence remains the cornerstone for continued growth.
Pep offers fully cnc or manual electron beam manufacturing for delicate parts. Electron beam welding ebw is a highenergy density fusion process that is accomplished by bombarding the joint to be welded with an intense strongly focused beam of electrons that have been accelerated up to velocities 0. Ptr manufactures electron beam and laser welders using proven designs and the latest technologies. Cottrell engineering consultant, manor bungalow, souldern, bicester, oxon. In addition to making eb and laser welding equipment, ptr assists customers with weld process development and provides maintenance and spares support for electron beam welding systems. Leadingedge eb welding since 1966 electron beam welding, llc. The investigation described in this paper was primarily material ori ented. Liquid state welding are those welding processes in which, the metal to metal joint form in liquid or molten state. Fitted with high magnification optics, cnc 3 axis work manipulation, wirefeed, and 9 diameter x 72 extension tubes.
The application of electron beam welding for the joining of dissimilar. The electron beam welding process is a very precise technique and is also highly repeatable due to the automation required. The core piece of the electron beam welding machine is the electron beam gun where the. Provides process definitions and requirements, safe practices, and inspection criteria for electron beam welding. Electron beam welding for fatigue critical applications ams2680 this specification defines the procedures and requirements for joining metals and alloys using the electron beam welding process. Therefore electron beam welding is proper for welding of duplex stainless steel s32750 for the lack of second phases in the microstructure which could affect embrittlement and reduction in the corrosion. An additional stigmator coil may help to correct aberrations of the lenses. A deflection coil assists in maintaining the electron beam oscillating motion. The workpieces melt and flow together as the kinetic energy of the electrons is transformed into heat upon impact. The top countries of suppliers are india, china, and malaysia, from which the percentage of electron beam welding machine supply is 1%, 95%, and 3% respectively. This paper presents the investigations carried out to study the microstructure and mechanical properties of aisi 304 stainless steel and aisi 4140 low alloy steel joints by gas tungsten arc welding gtaw, electron beam welding ebw and friction.
Electron beam welding, despite a long history and widespread arc and laser technology, is still widely used in industry. Laser beam welding process in general cases heat is required to fuse the metals for any types of welding, in laser beam welding process the heat is obtained from the application of a concentrated coherent light beam which striking upon the weld metal and melt the metal, such this weld joint is obtained, this welding process is called laser welding. The influence of the input parameter in case of electron beam welding munteanu adriana, nagit gheorghe department of machine tools, department of machine manufacturing technology technical university gh asachi iasi bdul d. Apr 27, 2015 electron beam welding at institute of scientific instruments of the cas, v. Electron beam freeform fabrication for cost effective near. Electron beam welding ebw is a fusion welding in which coalescence is produced by heating the workpiece due to impingement of the concentrated electron beam.
Electron beam welding ebw is a high energy fusion welding process that which uses an intense, narrow beam of electrons. The answer to this question depends on the welding application. Electron beam welding is a fusion welding process and can be used for welding a wide variety of metals, such as stainless steel, inconel, copper and other variations. Electron beam welding is a deep pene tration welding process. The influence of the input parameter in case of electron beam. Electron beam welding produces a minimal heat affected zone haz in the materials being joined but requires the welding to be done in a vacuum atmosphere. Electron beam welding pep precision engineered products. The concentration of energy is dependent on accelerating voltage.
Pdf investigation on aisi 304 austenitic stainless steel. Plasma charge current for controlling and monitoring electron. Electron beam welding of superduplex stainless steel. Investigations into the effects of electron beam welding on. Electron beam welding ptrprecision technologies, inc. The power concentration of 1 to 100 kwmm 2 is routinely achieved, and up to 10 mwmm 2 can be obtained for most welding. Recommended practices for electron beam welding supersedes aws c7. Electrons hit the workpiece and their kinetic energy is transformed to the thermal energy heating the metal so that the sides of the workpiece can be joined and a weld can be formed after freezing the electron beam welding is also a liquid state welding process. In addition, two different metals or alloys can be welded. Electrons are elementary atomic particles characterized by a negative charge and an extremely small mass.
Electron beam welding technology can be also adopted for the high or ultrahigh strength steel. Electron beam welding is a welding process that uses the heat produced by a beam of high energy electrons. Continuous improvements have earned ptrs electron beam welders the. This proposal presents a modular inchamber electron beam welding micebw approach that can be used to join largediameter, thicksection components such as reactor vessels, steam generators, and pressurizers. These advantages allow the use of electron beam for welding reactive and nonferrous metals, hightensile and heatresistant alloys that are typically used in the production of critical products. Banas united aircraft research laboratories i summary a direct comparison was made of electron beam, laser beam and arc welding processes in ti6alw alloy in nominal thicknesses of 0. Ebe facilities equipment list qty mfg description chamber size 3 ebe beamer 2 x 60 kv 3 kw electron beam welders 1 x 60 kv 5 kw electron beam welders 12 cube 2 ebe beamer 60 kv 3 kw electron beam welder. It is assembled from individual vanes and panels which are joined using electron beam welding. Investigations into the effects of electron beam welding on thick ti6al4v titanium alloy n. Its precise, high strength nature is wellsuited for durable biocompatible metal instruments that are used in challenging intraoperative environments. May 01, 2016 electron beam welding, despite a long history and widespread arc and laser technology, is still widely used in industry. Until then, you can download it to your computer as a pdf file 1. Electron beam welding ebw is a fusion welding process often done in a vacuum. Investigations be establish electron and laser beam welding parameters leading to improved fracture toughness properties in.
Long term relationships with our customers guides the efforts of our engineering group and have led to increased functionality, reliability and ergonomics of our systems. Studies on electron beam welded inconel 718 similar joints. Electron beam welding at institute of scientific instruments of the cas, v. Ptr is an electron beam welding systems manufacturer and contract welding service provider on the leadingedge of electron beam and vacuum welding technology.
Establishing modular inchamber electron beam welding. Eb industries is the preeminent electron beam welding services provider throughout the united. Electron beam, laser beam and plasma arc welding studies by c. This welding technology also creates strong and pure joins that can be used across a number of highend applications for a wide range of industries.
Electron beam process improves weld quality, shiprepair. A twopass double side welding technique was developed, and a joint thickness of 21mm was decided so that a partial penetration weld can be attempted with lesser beam power. Translated from the german, this is a practical book for engineers which explains the trials, development and manufacturing processes involved in electron beam welding. Electron beam welding is ideal when your application requires a very precise, clean weld with minimal heating of the material outside the primary area of the weld. Electron beam welding cambridge vacuum engineering. Schultz, electron beam welding, is an excellent technical reference for anyone involved in ebw whether just beginning to weld or currently experienced with eb welding. The metal thicknesses range from foils to thick metals sheets. The highvelocity electron beam when strikes the weld area of two metal pieces and very intense heat is generated which melts the metal and they fuse together to form a strong weld. Ebw is often performed under vacuum conditions to prevent dissipation of the electron beam. Using this approach, component welds up to 10 ft 3. In the present study, electron beam welding of solution treated inconel 718 alloy 3 mm thickness was carried out under varied parameters 50, 60 and 70 kv voltage. Laser beam welding lbw is a welding process, in which heat is generated by a high energy laser beam targeted on the workpiece.
Electron beam welding eb welding services eb industries. One of the most advanced electron beam welding machines is currently used by rollsroyce for welding titanium components of trent jet engines. Electron beam welding ebw methods useful for welding of thick copper material. Electronbeam welding ebw is a fusion welding process in which a beam of highvelocity electrons is applied to two materials to be joined. Petrov and others published parameters used for electron beam welding a comparative study find, read and cite all the research you need on researchgate. Electron beam welding of cmn steelstoughness and fatigue properties eb welding speed and weld width variations can substantially alter weld metal microstructures and toughness by s. Electron beam welding of cmn steelstoughness and fatigue. Electron beam welding ebw is a fusion welding process in which a beam of highvelocity electrons is applied to two materials to be joined. Please give us a call or email us through the contact form. Electron beam welding advantages,disadvantages and. When you visit our location we have a physical copy of our andrews hitec corporation brochure.
Materials considered difficult to weld by conventional processes may often be. Electron beam welding ebw is a fusion joining process that produces a weld by impinging a beam of high energy electrons to heat the weld joint. Electron beam welding customers include a wide variety of premier aerospace, defense, electronics, scientific research, medical, and. Electron beam welding provides consistent weld size and high joint strength. Twi has decades of expertise in developing electron beam processes, including a number of innovations to the technique. Some observations on the electron beam welding of copper beadonplate welds show the effects of impurities, focus position and energy input, and high rates of heat input can retard recrystallization effects by l. We will respond quickly to your questions or quote requests. Electron beam and laser welders electron beam welding ptr. Some observations on the electron beam welding of copper. Shaping lens, feed powder directly into a molten pool created by a laser. Electron beam welding parts, working, applications with. The welded assembly exhibited a minimum amount of distortion, but a better understanding of the effects of several key welding parameters on the structural integrity of the.
Electron beam welding features of metalceramic elements of membrane type are considered in this paper. Electron beam welding process, applications and equipment. Ebe facilities equipment list electronbeam welding. A few authors presented interesting results on beam welding of high or ultrahigh strength steel. Today, we provide precision electron beam welding from our 10,000 square foot facility in buena park, california. The penetration of the weld can be precisely adjusted from near zero to as much as 6 inches.
Research electron beam welding of thick copper material. Finite element modeling of electron beam welding of a. Trillwood says that best results are obtained using laser and electron beam welding when a specialist in these processes is consulted at the design stage of the part. Pdf a study on electron beam welding of stainless steel. Our equipment includes various eb machines with a range of voltage and power outputs and different vacuum chamber sizes, meaning that we can process both small and large components. Influences of welding speed and angle of entry of electron beam in the lower position on. Hence, electron beam welding ebw technique with its deep penetration power to produce narrow heat affected zones under high vacuum was employed to. The laser beam heats and melts the edges of the workpiece, forming a joint. Distortion and metallurgical effects are much less than other types of welding such as tig and mig.
The workpiece melt as the kinetic energy of the electrons is transformed into heat upon impact. Additionally, eb welding is excellent for joining dissimilar and hard to weld metals. Different properties are essential for different parts and use of dissimilar metals joints gives possibilities of flexible design and products by using each material efficiently. Handbook of electron beam welding by bakish, robert a. The beam current, accelerating voltage and welding speed are the factors that determine the depth of penetration of a focused beam. Electron beam welding ams2681 this specification defines the procedures and requirements for joining metals and alloys using the electron beam eb welding process. Electron beam welding is a machine controlled process, with welding carried out in vacuum with no filler material, resulting in exceptional weld quality and repeatability. Electron beam welding process is a fusion welding process in which a highvelocity electron beam is used to join two metals together. A study of electron beam welding of mo based tzm alloy. Electronbeam welding1 welding, brazing and soldering. In addition to building advanced eb systems, ptr provides electron beam welding services using stateofthe art equipment supported by experienced welding engineers. Investigations into the effects of electron beam welding on thick ti6al4v titanium alloy.
It is a unique process whereby metal components are bonded via high velocity. Electron beam welding which originated from applications in the aerospace industry penetrates deep into a metal unlike typical surface welding e. If you are at the beginning of a project, we can provide help with prototype testing and. The ring of vanes rov for a front bearing housing is a structural component of a trent jet engine. A wide variety of electron beam welding machine options are available to you, there are 239 suppliers who sells electron beam welding machine on, mainly located in asia. Variables listed in this international standard are those influencing the quality and properties of the welded joint. Welding of thick to thin material and dissimilar metals is easily accomplished. Electron beam welding an overview sciencedirect topics. T e c h p d m 1 st y e a r contents objective introduction history electron beam welding principle of electron beam welding major equipments of ebw working advantages limitations applications case studies references. Investigations into the effects of electron beam welding. A leading edge electron beam welding company since 1966, we partner with our customers to provide high performance quality results. A viewing optic or a video system allows the exact positioning of the electron beam onto the weld groove. This opens up entirely new possibilities such as simultaneous welding at various locations, welding while preheating and smoothing with two other beams, and other process combinations. Summary specifications during this process a high energy elecrtron beam melts a narrow region at the oining interfaces.
511 439 285 1207 946 1167 341 161 1195 408 956 795 41 1442 876 1516 1345 796 644 843 19 1151 402 483 1104 144 141 464 1316 1295 1389 335 861 1346 1004 1273 1452 901 1433 846