UNDERWATER WELDING IEEE PAPER
Preliminary investigation on real-time induction heating-assisted underwater wet welding
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ABSTRACT A novel realtime induction heating assisted underwater wet welding process was investigated. The addition of induction heating could reduce the cooling rate of the joint in underwater wet welding. The macro and microstructures, mechanical prop erties such
Analysis for Cooling Process of Underwater Welding-Comparison with Welding in Air*-
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Underwater welding techniques have been of growing importance as a number of new projects for offshore structures are under consideration and some of them are being put into practice. Underwater" wet type" welding is especially usefti1 for the repair and
Problems of underwater welding of higher-strength low alloy steels
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Abstract: The article characterizes the presently used techniques of underwater welding and the problems connected with obtaining the required properties of joints. The text also presents test results related to the weldability of higher-strength steels in underwater
Service Life of Tungsten Electrodes in hyperbaric dry Underwater welding
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ABSTRACT. In hyperbaric dry underwater welding, the hyperbaric gas tungsten arc welding (GTAW) procedure offers many advantages. However, determination of the electrode service life is a substantial condition for good results in unmanned and computer-
Underwater welding of steel
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ABSTRACT A fundamental basis to understand the behavior of wet underwater welding of steel is introduced. Both the pyrometallurgical and physical metallurgy concepts are discussed. Modifications of welding consumables and practice are suggested. This
Recent Developments in Underwater Repair Welding
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Introduction As nuclear plants age and reactor internal components begin to show increased evidence of age-related phenomena such as corrosion and fatigue, interest in the development of cost-effective mitigation and repair remedies grows. One technology currently receiving
Fundamental difficulties associated with underwater wet welding
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ABSTRACT The offshore industries carry out welding activities in the wet environment. It is evident that the wet environments possess difficulties in carrying out underwater welding. Therefore there is the need to improve the quality of weld achieved in underwater welding.
Characteristics of the new explosive welding technique using underwater shock wave-Based on numerical analysis
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Keywords: Explosive welding, underwater shock wave, numerical simulation, thin plate welding, controlled shock wave Abstract.(a) Fixed-thickness explosive (b) Changed-thickness explosive Fig. 1 Schematic of assembly for explosive welding using underwater shock wave.
A study on the development of underwater wet welding electrodes
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ABSTRACT: Underwater wet arc acids were ewerirnentaiiy pentirinea 'on the KR~ RA steel plate as base metal by using nir afrm types ofur carted electrodes:033, UWEE, MINES, and TNZU. LIWEE, the individually designed ax canted rindenoater electrode, had good
Wet Underwater Welding of C-Mn Steel Using FCAW Process
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Abstract. The need of investigation on the subject of mechanised wet welding has been continuously addressed by different researchers and required by the industrial sector. The spectrum of application of such research is wide: oil and gas industry, maritime-insurance
Effect of shielding conditions on welding properties in underwater local-dry laser welding
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ABSTRACT In underwater laser beam welding, the shielding condition of the local dry cavity is one of the key factors affecting the weld quality. The variation in the weld bead formation and mechanical properties of the welded joint under various shielding conditions was
Possibility of industrial application by the use of underwater shock wave for explosive weldingof various plates
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Underwater friction stir welding: an overview
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Abstract In recent years, the research has become the primary aim in every field. Underwater Friction Stir Welding (UFSW) is one the advanced techniques of welding. It is really new and emerging technology. It is a solid state welding. In this method, non consumable tool runs
PROCEDUREFOR UNDERWATER WELDING PROCEDURES
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2.4 Electrode Handling Procedure. All electrodes are to be received inhermetically sealed containers. Once the electrodes are removed from the containers, they shall be either stored inelectrode holding ovens at 22so-300oF, or they shall be immediatelysealed in plastic
Study on Underwater Welding (Report 1)
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Abstract Recently, many studies for developing the underwater welding techniques have been carried out in the advanced countries as a manufacturing process and a repairing method according as a great deal of interest in development for various marine industrial
Underwater Welding Parameters-A Review
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Abstract:Welding is an important manufacturing process in fabrication industry. Underwater welding finds its special applications in fabrication of subsea structure like oil and gas pipe lines and repair of ships, submarines and defense structures. The present paper deals
OF SEAM DEVIATION USING ARTIFICIAL NEURAL NETWORKS IN VISION-BASED SEAM TRACKING OF UNDERWATER FLUX-CORED ARC WELDING
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ABSTRACT Recognizing seam deviation properly is the basis of vision-based seam tracking. The traditional methods of image recognition show poor robustness when they are used for real-time recognition in welding environment. In this paper, artificial neural
Effect of Welding Speed, Current and voltage on Mechanical Properties of UnderwaterWelded Mild Steel Specimen (C, Mn, Si) with Insulated Electrode E6013
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What is quality weld It define that good weld quality can be found when the specimen have better mechanical properties to withstand higher resistance from the atmosphere and working condition. In this present study tried to found the quality weld in wet condition by
UNDERWATER WELDING
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The fact that electric arc could operate was known for over a 100 years. The first ever underwater welding was carried out by British Admiralty–Dockyard for sealing leaking ship rivets below the water line. Underwater welding is an important tool for underwater
Underwater Welding of Duplex Stainless Steel
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Abstract. The present work was conducted to assess the weldability of duplex stainless steel at underwater conditions. Interest of underwater welding of this steel grade is connected with necessity of preparing welding repair technologies for subsea pipelines widely used in
COMPARATIVE STUDY OF THE RESPONSE OF COMMERCIALLY AVAILABLE ELECTRODES TO UNDERWATER-WELDING AND AIR-WELDING
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Abstract:The first ever underwater welding was carried out by British Admiralty-Dockyard for sealing leaking ship rivets below the water line. Underwater welding is an important tool for underwater fabrication work. In 1946, special waterproof electrodes were developed in
Technical note: preliminary results on underwater laser beam welding of steels
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Discussion The achievement of high-quality welds obtained at depths of water up to 14 mm (0.6 in.) is an unexpected result (although recent results obtained by Dunn, ef al., Ref. 2, have spoken of the existence of a" beam propagation channel" through water when
Underwater Friction Stir Welding for Improving the Performance of Dissimilar Joints between Al/Mg alloys
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Underwater friction stir welding (u-FSW) for dissimilar joints between Mg and Al alloys was carried out in order to improve the joint performance by varying weld thermal cycle. By applying underwater welding, the tensile strength of the dissimilar joint could be improved
DEFORMATION AND COLLISION PROCESS OF METAL PLATE ON EXPLOSIVE WELDING USINGUNDERWATER SHOCK WAVE
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ABSTRACT Explosive welding using underwater shock wave has been conducted. This technique is a new method of explosive welding and can weld a steel plate with an amorphous film, multi-layer of thin copper plates and so on. The conventional method of
State of Art: Underwater Friction Stir Welding
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Abstract There are various conventional welding methods for joining aluminium alloys/materials. These methods have various problems and are overcome by the use of friction stir welding process (FSW). It a solid state welding process in which the non
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