Weld Pool
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Keyhole GTAW with Dynamic Wire Feeding Applied to Orbital Welding of 304L SS Pipes
Resumo Atualmente, no cenário brasileiro de óleo e gás a execução dos processos de soldagem para aços inoxidáveis consiste em sua grande maioria de aplicações manuais, dificultando qualquer aumento de produtividade e repetibilidade dos processos. Portanto, a automação desta etapa permite grandes avanços com resultados mais confiáveis, menores c
Soldag. insp.. Publicado em: 15/08/2019
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2. Metallurgical Characterization of API X65 Steel Joint Welded by MIG Welding Process with Axial Magnetic Field
In this work, API X-65 pipeline steel non-conventionally heat treated, to enhance its mechanical resistance, was welded using the Metal Inert Gas (MIG) process with and without the application of low intensity axial magnetic fields (6 mT). Microstructural and mechanical characterization of the welds revealed that the use of the magnetic field during welding
Mat. Res.. Publicado em: 23/03/2017
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3. A Study on Process Characteristics and Performance of Hot Wire Gas Tungsten Arc Welding Process for High Temperature Materials
Hot wire gas tungsten arc welding (HW-GTAW) process is the one where the filler wire is pre-heated close to its melting point before it is fed in to the arc. The effect of HW-GTAW parameters such as welding current, hot wire current and the wire feed rate during welding of super ASS 304H stainless steel tubes were evaluated in terms of heat input, voltage-cu
Mat. Res.. Publicado em: 28/11/2016
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4. Influence of Pushing and Pulling the Electrode Procedure and Addition of Second Layer of Welding on the Wear in Hardfacing of Fe-Cr-C
The aim of this work is evaluate the influence of welding conditions on abrasive wear resistance in coating of Fe-Cr-C. The metal base used in this investigation was the steel SAE 1020 and as welded metal the selfshilded tubular wires of Fe-Cr-C with 1.6 mm of diameter. The welding parameter such as amperage, voltage, welding speed, wire feed speed and the d
Mat. Res.. Publicado em: 19/09/2016
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5. Microstructure and Abrasion Resistance of Fe-Cr-C and Fe-Cr-C-Nb Hardfacing Alloys Deposited by S-FCAW and Cold Solid Wires
Abstract This work assesses the wear resistance behavior of different high Cr and Nb alloyed hardfacing deposits carried out by Self-shielded Flux Cored Arc Welding, considering the resulting microstructures as base for the analysis. To obtain non-commercial alloys, an “in-situ” technique was employed with addition of cold wire into the weld pool. Six co
Soldag. insp.. Publicado em: 2016-09
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6. Evaluación de matrices vítreas del sistema SiO2-Al2O3-CaO-MgO para fundentes aglomerados a través la basicidad óptica y criterios estructuro-químicos
The structural constitution and ionic or molecular nature of the glassy matrix in liquid aluminosilicates are governed mainly by the molar ratio O: (Si + Al), and during the welding process affect its thermodynamic, chemical and physical properties as well as in their interactions with the metal droplet and the weld pool. In aluminosilicate fusion, O2-ion in
Soldagem & Inspeção. Publicado em: 2011-06
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7. Use of termography techniques for detection of discontinued in the GTAW process through the monitoring o the weld pool / Uso de técnicas de termografia para detecção de discontinuidades no processo GTAW através do monitoramento da poça de fusão
No presente trabalho foi feito a implementação de um sistema de monitoramento usando uma câmera de infravermelho com a finalidade de detectar discontinuidades no cordão de solda, tais como, o Humping durante o processo de soldagem GTAW. Em base a trabalhos anteriores, se planificaram desenhos fatoriais considerando como parâmetros de entrada a corrente
Publicado em: 2010
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8. Avaliação de Processos GMAW Duplo-Arame em Baixa Corrente com Controle do Formato de Onda e com Auxílio de Feixe de Laser / Assessment of Low Current Tandem GMAW Processes with Waveform Control and with Aid of Laser Beam
In face of manufacturing-related limitations in the present-day industry, the welding sector has looked for new, or even not so new, processes. In other words, it has invested in the development of new processes and, especially, in the use of new arrangements for conventional processes. Thus, the aim of this work was to assess the use of combined processes a
Publicado em: 2009
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9. Monitorização e localização de defeitos na soldagem tig através do sensoriamento infravermelho
This work presents, in an exploratory form, the use of infrared emissions of the TIG arc as a parameter for process monitoring, detection and localization of defects or discontinuity during welding. A infrared sensor was used for focalizing part of the arc and weld pool and transformed the intensity of infrared radiation presented in the surrounding regions
Publicado em: 2008
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10. Estudo do efeito de fluxos na soldagem ATIG de alumínio
The feasibility of using ATIG (active flux TIG) welding for surface oxide removal in aluminum welding with direct polarity was evaluated. The influence of the flux on different conditions of specimen surface, variations in welding parameters and the effect of metal base composition was also evaluated. Welding trials were performed in a mechanized jig using a
Publicado em: 2007
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11. Mapeamento do processo mecanizado de soldagem unilateral FCAW com backing cerâmico aplicável no passe de raiz em aço carbono
This work aims to evaluate one-sided welding automatic using the flux cored arc welding process with ceramic backing in the root bead. The tests were performed using a KUKA KR-16, robot for welding in the flat position. The wire is the AWS A5.20-79 E 71T-1, with 1.2 mm diameter, V-groove butt joints were design to be used in steel plate ASTM A-36. The proces
Publicado em: 2007
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12. Laser beam welding of titanium nitride coated titanium using pulse-shaping
A new welding method which allows the assembly of two titanium nitride coated titanium parts is proposed. The welding procedure utilizes the possibility for pulse-shaping in order to change the energy distribution profile during the laser pulse. The pulse-shaping is composed of three elements: a) a short high power pulse for partial ablation at the surface;
Materials Research. Publicado em: 2005-09