Analysis of The Influence of The Heat Input and Bead Volume on HAZ Hardness for Submerged Arc Welding Process of Mild Steel Plates

2008 ◽  
Vol 41 (3) ◽  
pp. 46
Author(s):  
G. Vinamra ◽  
A. Kumar ◽  
P. K. Rai ◽  
A. Ghosh ◽  
S. Mukherkee ◽  
...  
Keyword(s):  
Mild Steel ◽  
Heat Input ◽  
Arc Welding ◽  
Welding Process ◽  
Submerged Arc Welding ◽  
Steel Plates ◽  
Arc Welding Process ◽  
Submerged Arc

Analysis of the Influence of the Heat Input and Bead Volume on HAZ Hardness for Submerged Arc Welding Process of Mild Steel Plates

2011 ◽  
Vol 284-286 ◽  
pp. 2469-2472
Author(s):  
Aniruddha Ghosh ◽  
Somnath Chattopadhyaya ◽  
S. Mukherjee
Keyword(s):  
Mild Steel ◽  
Heat Input ◽  
Arc Welding ◽  
Welding Process ◽  
Travel Speed ◽  
Submerged Arc Welding ◽  
Steel Plates ◽  
Critical Set ◽  
Arc Welding Process ◽  
Submerged Arc

In Submerged Arc Welding process involves critical set of variables which are needed to control. An attempt has been made in this paper to find out- the influence of the heat input and bead volume on HAZ Hardness for Submerged Arc Welding Process of Mild steel plates. Mild steel plates are welded by changing input variables (current, voltage, travel speed, i.e. heat input) and Rockwell hardness no. has been observed on welded portion and at the zone adjacent to the welded portion. A detailed analysis of the microstructure changes is carried out to understand the HAZ softening phenomenon.

Influence of Thermal Simulated and Real Tandem Submerged Arc Welding Process on the Microstructure and Mechanical Properties of the Coarse Grained Heat Affected Zone

2011 ◽  
Vol 110-116 ◽  
pp. 3191-3198
Author(s):  
Sadegh Moeinifar
Keyword(s):  
Grain Boundaries ◽  
Heat Affected Zone ◽  
Heat Input ◽  
Arc Welding ◽  
Welding Process ◽  
Submerged Arc Welding ◽  
Rolled Plate ◽  
Arc Welding Process ◽  
Submerged Arc ◽  
Tandem Submerged Arc Welding

The high-strength low-alloy microalloyed steel was procured as a hot rolled plate with accelerated cooling. The Gleeble thermal simulated process involved heating the steel specimens to the peak temperature of 1400 °C, with constant cooling rates of 3.75 °C/s and 2 °C/s to room temperature. The four-wire tandem submerged arc welding process, with different heat input, was used to generate a welded microstructure. The martensite/austenite constituent appeared in the microstructure of the heat affected zone region for all the specimens along the prior-austenite grain boundaries and between bainitic ferrite laths. The blocky-like and stringer martensite/austenite morphology were observed in the heat affected zone regions. The martensite/austenite constituents were obtained by a combination of field emission scanning electron microscopes and image analysis software The Charpy absorbed energy of specimens was assessed using Charpy impact testing at-50 °C. Brittle particles, such as martensite/austenite constituent along the grain boundaries, can make an easy path for crack propagation. Similar crack initiation sites and growth mechanism were investigated for specimens welded with different heat input values.

Investigating the effect of electrode preheating in novel water-cooled advanced submerged arc welding process

2018 ◽  
Vol 233 (10) ◽  
pp. 2015-2029 ◽  
Author(s):  
Ankush Choudhary ◽  
Munish Kumar Gupta ◽  
Manoj Kumar
Keyword(s):  
Arc Welding ◽  
Welding Process ◽  
Submerged Arc Welding ◽  
Steel Plates ◽  
Statistical Regression ◽  
Weld Metals ◽  
Arc Welding Process ◽  
Metal Hardness ◽  
Submerged Arc ◽  
Plate Distance

In this paper, a novel developed water-cooled advanced submerged arc welding (WASAW) process has been designed and established. The developed WASAW process can be utilized for higher preheating currents at 100% duty cycle. Subsequently, a multi-pass welding investigation has been carried out on AISI 1023 steel plates as per the L8 Taguchi orthogonal array by varying WASAW input factors namely voltage (V), wire feed rate (WFR), welding speed (WS), nozzle to plate distance (NPD), and preheat current (I), respectively. The relationships between selected WASAW process parameters and responses namely tensile strength (TS), yield strength (YS), percentage elongation (E), and weld metal hardness (H) has been established with statistical regression analysis and ANOVA method. Then, the effect of each input factor and their interactions on selected responses was analyzed using single effect and 3D surface plots. Lately, the fractography analysis of tensile fractured surfaces has been carried out to study the failure in all weld metals. Finally, Jaya and genetic algorithms have been applied to optimize the WASAW performance. Overall, the outcomes reveal that developed WASAW process yields a substantial enhancement in the mechanical behavior of all weld metals.

scholarly journals Effect of Flux Composition on the Percentage Elongation and Tensile Strength of Welds in Submerged Arc Welding

2016 ◽  
Vol 63 (3) ◽  
pp. 337-354 ◽  
Author(s):  
Brijpal Singh ◽  
Zahid A. Khan ◽  
A.N. Siddiquee ◽  
Sachin Maheswari ◽  
Satish Kumar Sharma
Keyword(s):  
Tensile Strength ◽  
Mild Steel ◽  
Arc Welding ◽  
Mechanical Performance ◽  
Welding Process ◽  
Submerged Arc Welding ◽  
Carbon Equivalent ◽  
Percentage Elongation ◽  
Arc Welding Process ◽  
Submerged Arc

Abstract This experimental study reveals the effects of CaF2, FeMn and NiO additions to the base fluxes on tensile strength and percentage elongation of the weld metal. The aim of this study is to develop suitable flux for mild steel for high tensile strength, impact strength and ductility. Bead on plate welds were made using submerged arc welding process. Mathematical model for percentage elongation and UTS of mild steel welds were made. The elements transfer to the welds have been correlated with the above mechanical performance characteristics. The effect of oxygen content on weld elongation and UTS also has been deduced. This study shows that CaF2 and NiO are the significant factors for tensile strength while FeMn is not significant for tensile strength. However, for elongation besides CaF2, the interaction of CaF2 and FeMn was also found significant. The effects of basicity index of the flux and carbon equivalent of the welds on tensile strength and percentage elongation of the welds have also been evaluated.

A Simplified Numerical Approach for Finding the Temperature Distribution in Submerged arc Welding Process

2012 ◽  
Vol 622-623 ◽  
pp. 315-318
Author(s):  
Aparesh Datta ◽  
Subodh Debbarma ◽  
Subhash Chandra Saha
Keyword(s):  
Temperature Distribution ◽  
Heat Source ◽  
Arc Welding ◽  
Welding Process ◽  
Numerical Approach ◽  
High Heat ◽  
Submerged Arc Welding ◽  
Fusion Welding ◽  
Arc Welding Process ◽  
Submerged Arc

The quality of joining has assumed a greater role in fabrication of metal in recent years, because of the development of new alloys with tremendously increased strength and toughness. Submerged arc welding is a high heat input fusion welding process in which weld is produced by moving localized heat source along the joint. The weld quality in turn affected by thermal cycle that the weldment experiences during the welding. In the present study a simple comprehensive mathematical model has been developed using a moving heat source and analyzing the temperature on one section and then the temperature distribution of other section are correlated with time delay with reference analyzed section.

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