scholarly journals The Effect of Wet Underwater Welding on Cold Cracking Susceptibility of Duplex Stainless Steel

2016 ◽  
Vol 16 (2) ◽  
pp. 68-77 ◽  
Author(s):  
J. Łabanowski ◽  
K. Prokop-Strzelczyńska ◽  
G. Rogalski ◽  
D. Fydrych
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Arc Welding ◽  
Hardness Test ◽  
Weldability Tests ◽  
Underwater Welding ◽  
Content Assessment ◽  
Nondestructive Tests ◽  
Manual Arc Welding ◽  
Coated Electrodes

Abstract The present work was conducted to assess the weldability of duplex stainless steel in underwater conditions. Metal manual arc welding (MMA) with the use of coated electrodes was used in the investigations. Tekken weldability tests were performed underwater at 0.5 m depth and in the air. Nondestructive tests, metallographic examinations of welds, ferrite content assessment in microstructure and hardness test were performed. The good weldability at underwater conditions of duplex stainless with the use of MMA method was confirmed, however difficulties in stable arc burning were revealed.

Underwater Welding of Duplex Stainless Steel

2011 ◽  
Vol 183 ◽  
pp. 101-106 ◽  
Author(s):  
Jerzy Łabanowski ◽  
Dariusz Fydrych ◽  
Grzegorz Rogalski ◽  
Krzysztof Samson
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Oil And Gas ◽  
Hardness Test ◽  
Oil And Gas Industry ◽  
Cavity Method ◽  
Gas Industry ◽  
Underwater Welding ◽  
Content Assessment ◽  
Offshore Oil And Gas

The present work was conducted to assess the weldability of duplex stainless steel at underwater conditions. Interest of underwater welding of this steel grade is connected with necessity of preparing welding repair technologies for subsea pipelines widely used in offshore oil and gas industry. The GMA local cavity welding method was used in the investigations. Welded beads were performed underwater at 0.5 m depth and in the air. Metallographic examinations of welds, ferrite content assessment in microstructure and hardness test were performed. The good weldability at underwater conditions of duplex stainless with the use of GMA local cavity method was confirmed.

Effect of Solution Temperature on Microstructure of 2205 Duplex Stainless Steel Welded Joints

2010 ◽  
Vol 658 ◽  
pp. 432-435
Author(s):  
Yuan Yuan Qiao ◽  
De Ning Zou ◽  
Jiao Li ◽  
Ying Han
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Arc Welding ◽  
Solution Treatment ◽  
Optical Microscope ◽  
Solution Temperature ◽  
2205 Duplex Stainless Steel ◽  
Manual Arc Welding ◽  
Temperature Solution ◽  
Steel Joints

The various temperature solution experiments were carried out in this paper, which for 2205 duplex stainless steel joints welded by manual arc welding. The evolutions of microstructure in pre/post solution treatment and the contents of ferrite phase were conducted by using optical microscope and ferrite scope detector. The analysis results in the welded, the heat affected and the base metal regions show that suitable solution treatment is effective to adjust the welded microstructure condition. The austenite in each region transformed into ferrite when the temperature enhanced from 1050 to 1200°C. This resulted in increasing the volume of ferrite and coarsening the grain. All microstructure characteristics of the three regions were taken into account, it deduced that the feasible solution temperature range was 1050~1100°C for 2205 duplex stainless steel welded joint.

Application of the Complete Material Balance Method to Estimate the Composition of Weld Metal in Manual Arc Welding

2017 ◽  
Vol 265 ◽  
pp. 762-766 ◽  
Author(s):  
E.B. Votinova ◽  
M.P. Shalimov
Keyword(s):  
Weld Metal ◽  
Arc Welding ◽  
Slag Phase ◽  
Material Balance ◽  
Equation System ◽  
The Third ◽  
Manual Arc Welding ◽  
Material Balance Method ◽  
The Mathematical Model ◽  
Coated Electrodes

The article addresses the mathematical model of manual arc welding with coated electrodes, based on complete material balance, the model is a three equation system. The first equation describes the interaction between average and partial transition coefficients; the second equation shows the transition of an element from the metal phase; the third one characterizes the reduction of an element from the slag phase. The results of modeling for base and rutile electrode are given. The convergence of experimental data and calculations is shown. The regressionequations to calculate the parameters required for forecasting the composition of overlaying metal and weld metal in manual arc welding are listed.

scholarly journals Examination of Tensile Deformation and Void Nucleation Behaviors of Duplex Stainless Steel Using Nano-Indentation Hardness Test

2014 ◽  
Vol 100 (10) ◽  
pp. 1261-1266 ◽  
Author(s):  
Masatoshi Aramaki ◽  
Satoshi Uchida ◽  
Kyono Yasuda ◽  
Makoto Oikawa ◽  
Osamu Furukimi
Keyword(s):  
Stainless Steel ◽  
Duplex Stainless Steel ◽  
Tensile Deformation ◽  
Void Nucleation ◽  
Hardness Test ◽  
Indentation Hardness ◽  
Nano Indentation

scholarly journals Mechanical Behavior of ARC Welding using Different Flux Materials

2019 ◽  
Vol 9 (2) ◽  
pp. 4344-4349
Keyword(s):  
Stainless Steel ◽  
Arc Welding ◽  
Large Scale ◽  
Welding Process ◽  
Hardness Test ◽  
Welding Parameters ◽  
Small Scale ◽  
Work Piece ◽  
Welding Operation ◽  
Small Scale Industries

To perform welding process on the material under varying conditions with different flux materials, different welding parameters and further subjecting the material to various suitable tests such as tensile test, hardness test, optical tests and study the characteristics of the material under testing. The tests conducted on the welded work piece it is proposed the suitable parameters under which welding of greater precision can be performed. it is also analyzed the working conditions under which the selected work piece material of stainless steel grade 304 would deviate from its desired characteristics. From the results of the tests it is able to determine the conditions that would reduce the characteristics of the welded work piece. Thus it can be further used for reference when the welding process is done on the same material of stainless steel of grade 304. The electrodes that were chosen for this project were selected by the criteria of widely used and chief material in the welding of various grades of stainless steel. The composition of the chemicals that constitute the electrodes were tribiologically analyzed and studied. The need for high precision welding in large scale as well as small scale industries is relatively high as the threshold for errors in such areas are greatly undesirable. The results of this study would greatly contribute to the reduction of errors and defects in the welding operation.

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