Stand off's indirect estimation in GMAW

Alfaro, Sadek Crisóstomo Absi; Carvalho, Guilherme; Junior, Soeiro

doi:10.1016/j.jmatprotec.2004.09.002

Cited by 5 publications

(2 citation statements)

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“…Todos eles têm a finalidade de aplicação de uma camada protetora de um material com propriedades superiores sobre o substrato (11)(12)(13)(14)(15) . Dos processos de soldagem ao arco elétrico, o GMAW possui grande importância na área de fabricação e reparo, o qual tem sido cada vez mais utilizado em linhas de montagem industriais do setor petrolífero, devido ao processo oferecer uma boa qualidade dos cordões de solda e com alta taxa de deposição e velocidade de soldagem (12,13,16) . Os revestimento por soldagem para proteção contra corrosão vem sendo bastante abordada nos últimos anos, utilizando-se aços inoxidáveis e as superligas de níquel, Inconel 625, como metal de adição para revestirem componentes e equipamentos da indústria do petróleo e gás natural.…”

Section: Introductionunclassified

Avaliação de Revestimentos à base de Inconel 625 depositados através do Processo de Soldagem GMAW em aço API 5L X70 utilizando Planejamento Fatorial

Santos

Maciel

Santana

2015

RBAV

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Concern for the environment has motivated several studies on the use of new materials to extend the life of equipment operating in harsh environments in the oil sector. One alternative that has been used is the application of coatings with high corrosion resistance welding process materials. The objective of this study was to evaluate the effects of different welding parameters on the geometric characteristics, dilution, microhardness, microstructure and corrosion resistance of the coatings with Inconel 625 alloy deposited on the API 5L X70 steel used in oil pipelines to transport plate. The parameters were optimized using the factorial statistical experimental design for analysis of process parameters, and the results analyzed by Response Surface Methodology (RSM). Three deposits were carried out ½ overwrite process GMAW (Gas Metal Arc Welding), followed by cross-sectional analysis of samples for the geometrical and metallographic characteristics. For the analysis corrosion, the coating surface being machined to have a height of 3 mm according to Standard N-1707 Petrobrás coating. The electrochemical behavior of the coating surface (Inconel 625) was investigated at room temperature in NaCl solution using the technique of linear potentiodynamic polarization and electrochemical impedance spectroscopy. To reveal the corrosion resistance of the coatings, featuring some important parameters were considered, such as: the polarization resistance (Rp) and the corrosion potential (Ecorr). The results showed dilution values D (%) ranging from 12.77% to 24.88% in the maximum levels (18.99 KJ/cm) and minimum (8.34 KJ/cm) welding power, and the amounts the most important of 12.77%. As to the corrosion resistance, the results were more satisfactory for the highest level of welding power.Keywords: GMAW; Coating; Corrosion. RESUMOA preocupação com o meio ambiente vem motivando diversas pesquisas sobre o uso de novos materiais para prolongar a vida útil de equipamentos que operam em ambientes agressivos no setor de petróleo. Uma das alternativas que vem sendo utilizada é a aplicação de revestimentos com materiais de alta resistência à corrosão por processo de soldagem. Objetivou-se neste estudo avaliar os efeitos dos diferentes parâmetros de soldagem sobre as características geométricas, diluição, microdureza, microestrutura e resistência à corrosão dos revestimentos com liga Inconel 625 depositados sobre chapa do aço API 5L X70 utilizado em dutos para transporte de petróleo. Os parâmetros foram otimizados utilizando o planejamento experimental fatorial completo para analise dos parâmetros de processo, sendo os resultados analisados pela Metodologia de Superfície de Resposta (MSR). Foram realizados três depósitos com sobreposição de ½ por processo de soldagem GMAW (Gas metal arc welding), seguido de corte transversal das amostras para a analise das caraterísticas geométricas e metalograficas. Para as analises de corrosão, as superfície do revestimento foram usinadas ficando com uma altura de 3 mm de acordo com a norma N...

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Section: Introductionunclassified

Avaliação de Revestimentos à base de Inconel 625 depositados através do Processo de Soldagem GMAW em aço API 5L X70 utilizando Planejamento Fatorial

Santos

Maciel

Santana

2015

RBAV

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“…The use of flux-cored wire electrode has a considerable share in arc welding methods performed under gas shielding [1]. Flux-cored arc welding (FCAW) method works with the same principle of gas metal arc welding (GMAW) method [1][2][3]. The difference between two techniques is that while GMAW method uses solid welding wires [3,4], FCAW method uses flux-cored wires which contain slag-forming agent, gas--generating agent, alloying elements, and deoxidation elements [1,5].…”

Section: Introductionmentioning

confidence: 99%

The effect of pure argon and mixed gases on microstructural and mechanical properties of S275 structural steel joined by flux-cored arc welding

Çevik¹

2018

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Studies on the use of various welding methods and equipment (electrode, welding wire, welding powder, etc.) in welding of steels have intensively continued nowadays. Flux-cored arc welding technology is one of the welding methods which have mostly been investigated and applied to different metals in recent years. In this study, the effect of different shielding gases on microstructural and mechanical properties of S275 structural steel joined by flux-cored arc welding was examined. Pure argon (100 % Ar) and a mixed gas (86 % Ar, 12 % CO2, 2 % O2) were used as shielding gas in welding processes. A double V groove of 50 o was opened on steel sheets. Welding processes were performed horizontally by using a 1.2 mm-diameter rutile flux-cored wire. Tensile, hardness, and bending tests were used to determine mechanical properties of welded samples. In addition, metallographic examinations were performed to determine microstructural properties of weld zones. As a result of the tensile test, the highest mechanical properties were obtained from weld seams by the mixed gas. There were crack and rupture defects in weld zone as a result of bending tests. In all welding parameters, the hardness of weld metal was higher than that of the heat affected zone (HAZ) and base metal. The microstructure studies revealed that grain coarsening occurred in HAZ. K e y w o r d s : flux-cored arc welding, shielding gas, argon, mixed gas, mechanical properties, microstructure

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Numerical Modeling of Heat-Affected Zone in the GMAW Process

Ghazvinloo

Honarbakhsh-Raouf

2021

Mater Sci

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Stand off's indirect estimation in GMAW

Cited by 5 publications

References 1 publication

Avaliação de Revestimentos à base de Inconel 625 depositados através do Processo de Soldagem GMAW em aço API 5L X70 utilizando Planejamento Fatorial

Avaliação de Revestimentos à base de Inconel 625 depositados através do Processo de Soldagem GMAW em aço API 5L X70 utilizando Planejamento Fatorial

The effect of pure argon and mixed gases on microstructural and mechanical properties of S275 structural steel joined by flux-cored arc welding

Numerical Modeling of Heat-Affected Zone in the GMAW Process

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