Effects of Welding Heat Input on Microstructure and Electrochemical Behavior of Flux‐Cored Arc‐Welded Q690 HSLA Steel

Wang, Kai; Lu, Qinghua; Yi, Yaoyong; Yi, Jianglong; Niu, Ben; Jiang, Zexin; Ma, Jie

doi:10.1155/2018/7484025

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…Despite the great practical significance of problems associated with the storage of welding consumables, this topic is relatively rarely discussed in the literature. Previous works mainly concerned the impact of wire construction and storage conditions on the diffusible hydrogen amount in weld metal [ 18 , 22 , 38 ] and the influence of welding parameters and conditions on the quality and properties of welded joints [ 20 , 39 , 40 , 41 , 42 ]. Accordingly, the purpose of the work was to analyze the impact of storage conditions of seamless, copper plated flux-cored wires on the plasticity of the bead-on-plate welds made with these wires.…”

Section: Introductionmentioning

confidence: 99%

Plasticity of Bead-on-Plate Welds Made with the Use of Stored Flux-Cored Wires for Offshore Applications

Świerczyńska

Landowski

2020

Materials

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Extreme atmospheric conditions in the marine and offshore industry are harmful to engineering materials, especially to welded joints, and may cause degradation of their properties. This article presents the results of research on the plasticity of bead-on-plate welds made using two types of seamless, copper plated flux-cored wires. Before welding, spools with wire were stored for 1 month in two distinct locations with different geographical and industrial conditions in Poland, and then subjected to visual examination. Bead-on-plate welds were subjected to a static tensile test and on this basis plasticity indexes showing the effect of storage on plasticity were determined. The fractures after tensile tests and the surfaces of the wires were examined on an electron scanning microscope. Additionally, diffusible hydrogen content in deposited metal measurements for each condition were carried out. The highest degradation level was found for wire stored in an agricultural building in north-eastern Poland—there was an almost fourfold decrease in the plasticity index value and the highest diffusible hydrogen content. For the same wire and the same location, the largest difference was also observed in fracture morphology after the tensile test—ductile fracture was obtained for wire at delivery condition while an almost full cleavage fracture was found after relatively short (1 month) storage of wire.

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Section: Introductionmentioning

confidence: 99%

Plasticity of Bead-on-Plate Welds Made with the Use of Stored Flux-Cored Wires for Offshore Applications

Świerczyńska

Landowski

2020

Materials

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“…Moreover, the high cost of measuring glass viscosity and the difficulty of measuring the range of low viscosity, restrict its real practice. To accurately fit the viscosity-temperature curve, researchers have taken great efforts to manage glass viscosity, through controlling each correlated contributor such as temperature [4,5], compositions [6,7], structure [8,9], thermal history [10,11], etc.…”

Section: Introductionmentioning

confidence: 99%

A Novel Viscosity-Temperature Model of Glass-Forming Liquids by Modifying the Eyring Viscosity Equation

et al. 2020

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Many models have been created and attempted to describe the temperature-dependent viscosity of glass-forming liquids, which is the foundational feature to lay out the mechanism of obtaining desired glass properties. Most viscosity models were generated along with several impact factors. The complex compositions of commercial glasses raise challenges to settle these parameters. Usually, this issue will lead to unsatisfactory predicted results when fitted to a real viscosity profile. In fact, the introduction of the reliable viscosity-temperature data to viscosity equations is an effective approach to obtain the accurate parameters. In this paper, the Eyring viscosity equation, which is widely adopted for molecular and polymer liquids, was applied in this case to calculate the viscosity of glass materials. On the basis of the linear variation of molar volume with temperature during glass cooling, a modified temperature-dependent Eyring viscosity equation was derived with a distinguished mathematical expression. By means of combining high-temperature viscosity data and the glass transition temperature (Tg), nonlinear regression analysis was employed to obtain the accurate parameters of the equation. In addition, we have demonstrated that the different regression methods exert a great effect on the final prediction results. The viscosity of a series of glasses across a wide temperature range was accurately predicted via the optimal regression method, which was further used to verify the reliability of the modified Eyring equation.

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“…Arc welding using FCAW (Flux Cored Arc Welding) is a commonly used alternative to GMAW (Gas Metal Arc Welding) due to higher welding efficiency, penetration depth, better arc stability and relative ease of welding [1][2][3][4]. The area of its application includes, in particular, shipbuilding, construction and machine industry as well as regeneration of machine elements, technical devices, manufacturing and modification of surface layers [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Effect of Storage Conditions of Rutile Flux Cored Welding Wires on Properties of Welds

Świerczyńska

2019

Advances in Materials Science

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The influence of storage locations of two grades of rutile flux cored welding wires on their surface condition and the strength of the welds made with them were studied. Wires were stored in real urban conditions (Gdańsk and Katowice) for 1 month, simultaneously recording changes in conditions: temperature and relative humidity of the environment. Visual tests of wires in the delivered and stored condition as well as visual and tensile strength tests of welds made with them were carried out. It was found that the surface of the wires underwent more intense degradation (atmospheric corrosion) during storage in Katowice than in Gdańsk. Significant difference in tensile strength was observed only for padding welds made using Gdańsk stored wires. The lowest recorded tensile strength value was not lower than the standard requirements for the wires.

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Effects of Welding Heat Input on Microstructure and Electrochemical Behavior of Flux‐Cored Arc‐Welded Q690 HSLA Steel

Cited by 3 publications

References 20 publications

Plasticity of Bead-on-Plate Welds Made with the Use of Stored Flux-Cored Wires for Offshore Applications

Plasticity of Bead-on-Plate Welds Made with the Use of Stored Flux-Cored Wires for Offshore Applications

A Novel Viscosity-Temperature Model of Glass-Forming Liquids by Modifying the Eyring Viscosity Equation

Effect of Storage Conditions of Rutile Flux Cored Welding Wires on Properties of Welds

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