Consumibles para soldadura por arco eléctrico: algunos desarrollos recientes

Surian, Estela

doi:10.1590/s0104-92242013000100011

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…According to Surian [86], although consumables suitable for welding of high-strength steels have been extensively studied, most reports are related to the "pure weld metal." As consequence, the development of specific welding procedure is still required to the appropriate performance of the weld deposits for each base metal.…”

Section: Practical Aspectsmentioning

confidence: 99%

Influence of rotation frequency and rotation diameter on mechanical properties and microstructure of weld metal produced by MCAW-RE

Silveira

Filho

Costa

et al. 2020

Int J Adv Manuf Technol

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The MCAW process with rotating electrode (MCAW-RE) is a variation of the conventional gas metal arc welding process, which a metal-cored wire is submitted to a rotational movement along a pre-established diameter. This process enhances narrow gap welding, since the rotational motion of the electrode allows the electric arc to reach peripheral regions of the groove, preventing lack of fusion on the sidewall. As a result, reduced costs and superior productivity compared with the conventional GMAW process are obtained. The limited literature about this process is focused on the operational characteristics, and works studying the mechanical properties are not available. Thus, this work evaluates the mechanical and microstructural properties of weld metals obtained by the MCAW-RE process in order to allow a decision about its technical feasibility to replace the GMAW process in industry. Initially, beads on plate weld tests were performed with varying rotation frequency and rotation diameter, in order to determine the parameters to be used in welded joints. High-strength steel weld metals were obtained by welding performed in steel plates with dimensions of 500 × 300 × 10 mm. Mechanical tests and metallographic examination were carried out in samples removed transversally to the weld bead. The results showed that the impact toughness of the weld metals can achieve the requirements for several industrial applications. The results showed that the GMAW process with rotating electrode-cored wire has a high potential for replacement of the GMAW in industrial applications.

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Section: Practical Aspectsmentioning

confidence: 99%

Influence of rotation frequency and rotation diameter on mechanical properties and microstructure of weld metal produced by MCAW-RE

Silveira

Filho

Costa

et al. 2020

Int J Adv Manuf Technol

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“…El número óptimo de expertos se calculó en la expresión (1) a partir de la ecuación empleada por Duffus [23] en (1).…”

Section: Métodosunclassified

“…Es conocida la evolución del uso de los procesos de soldadura por arco eléctrico durante los últimos años [1]. En los países de Latinoamérica, esta tendencia ha sido menos marcada, empleándose hasta el 40 % del metal depositado en países como Argentina.…”

Section: Introductionunclassified

Metodología para la selección de la mejor variante entre electrodos de doble revestimiento para recargue

Cabrera

Pérez

Paz

2020

TecnoL.

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El presente trabajo persigue establecer una metodología que permita la selección de la mejor variante a emplear ante determinadas condiciones de un consumible para enfrentar fenómenos de desgaste, y que esta conjugue los principales parámetros que puedan arrojar criterio para ello. Entre los criterios seleccionados como parte de la metodología, se encuentran los ensayos de estabilidad del arco y los relacionados con la determinación de los parámetros de consumo de los electrodos, los cuales permiten la evaluación del comportamiento operativo. Para el primero, se calculan los valores de la conductividad del arco, y para el segundo, el coeficiente de deposición. En cuanto a la evolución del depósito, se decide por la medición de la resistencia al desgaste por medio de la pérdida de masa, empleando el ensayo de abrasión con espiga. Los valores obtenidos en estas tres pruebas se aleatorizan y se someten a criterio de expertos. Las valoraciones de los expertos se procesan y se obtiene, matemáticamente, la ponderación que los expertos otorgan a cada parámetro expresado, a través de ecuaciones de regresión. Se selecciona unánimemente como la mejor variante de electrodo doblemente recubierto, la que posee la carga de aleación externa. Los resultados del análisis realizado para la selección de la mejor variante sugieren que la resistencia al desgaste, evaluada a través de la pérdida de masa, es el criterio de mayor relevancia para la selección de electrodos destinados al recargue de piezas.

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“…The evolution of the use of arc welding processes in recent years is well known [1] . In Latin American countries this trend has been less marked, being used for 40% of the metal deposited in countries such as Argentina.…”

Section: Introductionmentioning

confidence: 99%

Arc Stability Characterization of Double Coated Electrodes for Hardfacing

González-Cabrera

Gómez-Pérez

Kairús-Hernández-Díaz

et al. 2021

j. of mech. eng. res.

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The aim of this work is to establish the influence of the relative position of the alloy charge C-Cr-Mn in the structure of the coating of rutile electrodes for hardfacing, on the operational behavior (arc stability). For this, three variants of electrodes with similar chemical composition are elaborated in the metallic core and the coating, differentiating only in the relative position that occupies the alloy charge (C-Cr-Mn) in the structure of the coating: internal, external and homogeneous. For the development of the research a completely random design is used. The operative characterization of the electrodes is performed in terms of the arc stability. In conclusion, it can be seen that the position of the alloy load influences the operation behavior (stability of the arch). The variant of internal alloy charge in the coating presents the better arc stability performance.

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Consumibles para soldadura por arco eléctrico: algunos desarrollos recientes

Cited by 5 publications

References 9 publications

Influence of rotation frequency and rotation diameter on mechanical properties and microstructure of weld metal produced by MCAW-RE

Influence of rotation frequency and rotation diameter on mechanical properties and microstructure of weld metal produced by MCAW-RE

Metodología para la selección de la mejor variante entre electrodos de doble revestimiento para recargue

Arc Stability Characterization of Double Coated Electrodes for Hardfacing

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