Evaluation of cold wire addition effect on heat input and productivity of tandem submerged arc welding for low-carbon microalloyed steels

Mohammadijoo, Mohsen; Collins, Laurie; Henein, H.; Ivey, Douglas G.

doi:10.1007/s00170-017-0150-3

Cited by 11 publications

(4 citation statements)

References 31 publications

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“…Figure 7 shows that the CWFS has the most dominant effect on the CGHAZ and WM micro-hardness pro les, since cold wire addition alters the local thermal cycle by absorbing the heat from the molten pool. Mohammadijoo et al [30,31] evaluated the effect of cold wire addition on heat input and hardness pro le in the HAZ and they reported that increasing the CWFS leads to a higher hardness because of the faster cooling rate. In addition, the heat input and voltage may also contribute to the CGHAZ hardness pro le since they can change the local thermal cycle and the size of the CGHAZ area.…”

Section: Signi Cance Of Welding Parametersmentioning

confidence: 99%

Parametric study of cold wire tandem submerged arc welding of heavy gauge X70 linepipe steel

Ren

Mohammadijoo²,

Wiskel³

et al. 2022

Preprint

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Cold wire tandem submerged arc welding (CWTSAW) has been developed to improve the productivity (i.e., deposition rate and travel speed), and to control the weld and heat-affected zone (HAZ) geometry and mechanical properties of heavy gauge pipe. A series of CWTSAW trials were conducted on thick-wall American Petroleum Institute (API) X70 steel plates to investigate the effect of cold wire feed speed (CWFS), heat input (HI) and bevel design (BD) on the resulting geometry (e.g., height of reinforcement area (HRA), bead toe angle (BTA) and coarse grain heat-affected zone (CGHAZ) area) and micro-hardness of the weld and HAZ. The phase fraction of martensite-austenite (MA) constituents was measured using optical microscopy (OM) and scanning electron microscopy (SEM). Vickers micro-hardness measurements were taken of the weld metal and across the HAZ. The geometry and hardness measurements were statistically correlated with the weld parameters using Taguchi methodology. The results showed that the weld bevel design (BD) was the dominant factor influencing the HRA, CGHAZ area and BTA. Cold wire feed speed (CWFS) had a strong influence on the micro-hardness and phase fraction of MA constituents in the CGHAZ.

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Section: Signi Cance Of Welding Parametersmentioning

confidence: 99%

Parametric study of cold wire tandem submerged arc welding of heavy gauge X70 linepipe steel

Ren

Mohammadijoo²,

Wiskel³

et al. 2022

Preprint

Self Cite

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show abstract

“…A higher density of inclusions on the fracture surface is observed in ABF5. ABF5 has the impact toughness of 113 J; it also comprises voids and debonded particles, indicating voids nucleation and coalescence, which later give rise to crack formation [38,39].…”

Section: Impact Toughness and Fractographymentioning

confidence: 99%

Microstructural and Mechanical Evaluations of SAW By Manufactured Granular Basic Bonded Cr, Mo, and Cr-Mo Active Fluxes on ST37 Low Carbon Steel

Alishavandi

Mohammadmirzaei

Ebadi

et al. 2021

Preprint

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Bead-on-plate submerged arc welding was conducted on St37 steel by manufactured Cr, Mo, and Cr-Mo active basic fluxes produced via the unfused bonded method. The base metal heat-affected zone and weld metal (WM) microstructures were identified and characterized by optical microscopy and scanning electron microscopy. Then, the ferrite morphologies volume fraction of WMs were measured. Moreover, the chemical analysis of slag and inclusions was evaluated by point scan energy-dispersive X-ray spectroscopy and extensively discussed. Inclusions number density and size and their effects on the formation of AF were also elaborated. Then, the WMs’ longitudinal tensile strength and Vickers hardness were measured. Finally, the Charpy V-notch test was conducted to determine the impact toughness; the fracture surfaces were investigated, as well.

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“…O valor superior restringe o uso de maiores velocidades de alimentação de arame (WFS) e corrente de soldagem, o que representa um fator limitante para aumentar a produtividade ao soldar os AID, especialmente na soldagem por arco submerso (SAW) no qual um alto nível de energia de soldagem é geralmente aplicado. A adição de arame frio representa uma alternativa interessante, pois permite o aumento da taxa de deposição sem o aumento de HI [14][15][16]. Algumas pesquisas foram relatadas sobre a adição de arame frio em SAW para ligas de aço carbono [14][15][16][17], mas nenhuma foi encontrada para AID.…”

Section: Introductionunclassified

“…A adição de arame frio representa uma alternativa interessante, pois permite o aumento da taxa de deposição sem o aumento de HI [14][15][16]. Algumas pesquisas foram relatadas sobre a adição de arame frio em SAW para ligas de aço carbono [14][15][16][17], mas nenhuma foi encontrada para AID.…”

Section: Introductionunclassified

Avaliação da Energia de Soldagem e da Adição de Arame Frio nas Características Dimensionais, Químicas e Metalúrgicas do Metal de Solda Obtido por Arco Submerso em Aços Inoxidáveis Lean Duplex UNS S32304

et al. 2018

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Resumo A energia de soldagem (HI) máxima indicada para soldagem dos aços inoxidáveis duplex de 2,5kJ.mm-1 representa um fator limitante para o aumento de produtividade na soldagem dos mesmos, sendo a adição de arame frio uma alternativa interessante à essa questão. Avaliou-se a influência da energia de soldagem e da adição do arame frio nas características dimensionais, químicas e metalúrgicas do metal de solda (MS) obtido por arco submerso (SAW) em aço “lean” duplex UNS S32304, utilizando-se o consumível ER2209. Empregou-se o sistema ICETM que adiciona um arame frio entre dois arames energizados “twin” para executar cordões sobre chapas, empregando-se quatro diferentes HI e variando-se a porcentagem de arame frio em relação aos arames quentes em 0, 50 e 100%. Foram realizadas análise química, macrografia, análise dimensional, microscopia ótica e MEV/EDS do MS. A microestrutura do MS foi constituída de uma matriz ferrítica com a presença de austenita de contorno de grão, de Widmanstatten e intragranular e inclusões não metálicas, não sendo observado a ocorrência de precipitados deletérios como σ, χ e nitreto de cromo. A adição de arame frio aumentou a taxa de deposição e provocou a redução da diluição, produzindo soldas com maiores números equivalentes de resistência à corrosão por pite, principalmente para maiores HI, e maiores frações de austenita. Isso indica que o aumento da velocidade de alimentação de arame frio propicia o aumento da produtividade e da resistência à corrosão por pite do MS.

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Evaluation of cold wire addition effect on heat input and productivity of tandem submerged arc welding for low-carbon microalloyed steels

Cited by 11 publications

References 31 publications

Parametric study of cold wire tandem submerged arc welding of heavy gauge X70 linepipe steel

Parametric study of cold wire tandem submerged arc welding of heavy gauge X70 linepipe steel

Microstructural and Mechanical Evaluations of SAW By Manufactured Granular Basic Bonded Cr, Mo, and Cr-Mo Active Fluxes on ST37 Low Carbon Steel

Avaliação da Energia de Soldagem e da Adição de Arame Frio nas Características Dimensionais, Químicas e Metalúrgicas do Metal de Solda Obtido por Arco Submerso em Aços Inoxidáveis Lean Duplex UNS S32304

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