Effect of shielding gas mixture on gas metal arc welding of HSLA steel using solid and flux-cored wires

Mukhopadhyay, Subhadipta; Pal, Tapan Kumar

doi:10.1007/s00170-005-2510-7

Cited by 49 publications

(33 citation statements)

References 4 publications

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“…Generally, the Charpy impact toughness values of WM revealed that as the CO 2 percent increases in the shielding gas, the absorbed energy value decreases. This can be attributed to the previous observed microstructures in Figure 7, which confirmed that Acicular Ferrite percent decreased and Grain boundary Ferrite percent increased with the increase in CO 2 content of the shielding gas [14,18]. Acicular Ferrite has a beneficial effect on the toughness in the absence of other brittle zones [18].…”

Section: Effect Of the Different Shielding Gas Compositions On Impactsupporting

confidence: 70%

“…High productivity, applicability for a wide range of base metal thickness in all welding positions, and adoptability to automation are characteristics of Gas metal arc welding (GMAW) process [14]. GMAW process has become popular because of its high quality welded joints that can be obtained at relatively low cost [5], and its considerable potential for automation [7].…”

Section: Literature Surveymentioning

confidence: 99%

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The Role of Shielding Gas on Mechanical, Metallurgical and Corrosion Properties of Corten Steel Welded Joints of Railway Coaches Using Gmaw

John¹,

Sathiya²,

Mathew³

2016

Adv. Sci. Technol. Res. J.

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This analysis lays emphasis on finding a suitable combination of shielding gas for welding underframe members such as sole bar of Railway Coaches made of corten steel; for improved mechanical, metallurgical and corrosion properties of welds using copper coated solid MIG/MAG welding filler wire size 1.2 mm conforming to AWS/SFA 5.18 ER 70 S in Semi-automatic GMAW process. Solid filler wire is preferred by welders due to less fumes, practically no slag and easy manipulation of welding torch with smooth wire flow during corrosion repair attention, when compared to Flux cored wire. Three joints using Gas metal arc welding (GMAW) with shielding gases viz., Pure CO 2, (80% Ar -20% CO 2 ) and (90% Ar -10% CO 2 ) were made from test pieces cut from Sole bar material of Railway Coach. Study of Mechanical properties such as tensile strength, hardness and toughness revealed that welded joint made using shielding gas (80% Ar -20% CO 2 ) has better Mechanical properties compared to the other two shielding gases and comparable to that of Parent metal. Type of Shielding gas used has influence on the chemical composition and macro & micro structures. The Tafel extrapolation study of freshly ground samples in 3.5% NaCl solution revealed that the welded joint made using shielding gas (80% Ar -20% CO 2 ) has also better corrosion resistance which is comparable to the Parent metal as well as similar commercial steels.

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Section: Effect Of the Different Shielding Gas Compositions On Impactsupporting

confidence: 70%

Section: Literature Surveymentioning

confidence: 99%

The Role of Shielding Gas on Mechanical, Metallurgical and Corrosion Properties of Corten Steel Welded Joints of Railway Coaches Using Gmaw

John¹,

Sathiya²,

Mathew³

2016

Adv. Sci. Technol. Res. J.

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“…Given the corresponding peculiar advantages and high productivity, the FCAW is currently widely utilized in many engineering industries for joining metals, especially for the Q690 HSLA steel welding [9]. Once the flux-cored wire, the BM, and the shielding gas are preset, the properties of FCAW joints are mainly affected by the weld metal (WM) at various welding parameters [10][11][12]. Jindal et al [13] demonstrated that the high-quality WM could be obtained through the welding parameter control within an optimized range.…”

Section: Introductionmentioning

confidence: 99%

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

Wang

Yi³

et al. 2018

Advances in Materials Science and Engineering

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In this work, the weld metal (WM) for the Q690 high-strength low-alloy (HSLA) steel was prepared through flux-cored arc welding (FCAW) at 10 kJ/cm and 20 kJ/cm heat inputs. e effect of welding heat input on the relationship between the microstructural factors and the electrochemical behavior of the FCAW Q690 steel was studied. Due to the fine grain and acicular ferrite affected by the 10 kJ/cm low heat input, the WM presented similar electrochemical behavior to the Q690 base metal, which would minimize the risk of galvanic corrosion. Also, at 20 kJ/cm of high welding heat input, the WM with higher-sized bainite structure was prone to galvanic corrosion risk minimization.

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“…Being one of the most significant parameters during the welding treatment, shielding gas protects weld metal from the adverse effects of the nitrogen and oxygen contained in the atmosphere and ensures steady arc and uniform metal transfer. Therefore, type and composition of the gas used considerably affect the microstructure and mechanical characteristics of the joined material [10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Characterization of microstructure, chemical composition, and toughness of a multipass welded joint of austenitic stainless steel AISI316L

Tümer

Yilmaz

2016

Int J Adv Manuf Technol

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In this study, AISI 316 types of austenitic stainless steels were welded by FCAW (flux-cored arc welding) using E316LT1-1/4 flux-cored wire under various shielding gas mixtures containing CO 2 at different ratios. Effects of mixed ratio of Ar and CO 2 in the in the shielding gas on the microstructure, impact toughness, and microhardness of welded materials were studied. Stereo optical microscopy, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscope (TEM), and TEM/ mapping analysis techniques were used for microstructural characterizations. The impact toughness values of the weldments were decreased as a result of the formation and growth of inclusions in the microstructure due to the increases amount of CO 2 in the shielding gas. The hardness values and δ-ferrite amount in the weld metal were affected by depending on of the shielding gas mixtures.

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Effect of shielding gas mixture on gas metal arc welding of HSLA steel using solid and flux-cored wires

Cited by 49 publications

References 4 publications

The Role of Shielding Gas on Mechanical, Metallurgical and Corrosion Properties of Corten Steel Welded Joints of Railway Coaches Using Gmaw

The Role of Shielding Gas on Mechanical, Metallurgical and Corrosion Properties of Corten Steel Welded Joints of Railway Coaches Using Gmaw

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

Characterization of microstructure, chemical composition, and toughness of a multipass welded joint of austenitic stainless steel AISI316L

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