GTA Welding of Copper Thick Plates by Using ERCuTi Welding Materials

2011 ◽  
Vol 697-698 ◽  
pp. 409-413
Author(s):  
Yi Nan Li ◽  
Z.L. Peng ◽  
J.C. Yan
Keyword(s):  
Arc Welding ◽  
Gta Welding ◽  
Plastic Properties ◽  
Thick Plates ◽  
Welding Material ◽  
Gas Tungsten Arc ◽  
The Impact ◽  
Filler Metals ◽  
Impact Ductility ◽  
Welding Materials

The new welding material – ERCuTi alloys filler metals were developed specially for gas tungsten arc welding (GTAW) of copper. The hot cracking in welding copper is inhibited completely as the addition of de-oxidant element Ti in copper welding material. The degree of addition of Ti (2-4wt%) is critical when the susceptibility of cracking is to be suppressed. If the level is allowed to exceed 4wt%, more low-melting point eutectics (β-TiCu4and TiCu2) will be formed in the welds, and cracking susceptibility will be increased again. Results of mechanical properties tests show that although adding Ti increases the hardness and strength of the weld compared to the base metal, the impact ductility and the plastic properties are not decreased significantly.

scholarly journals Enhanced Weld Penetrations in GTA Welding with Activating Fluxes Case Studies: Plain Carbon & Stainless Steels, Titanium and Aluminum

2014 ◽  
Vol 783-786 ◽  
pp. 2804-2809 ◽  
Author(s):  
Guillaume Rückert ◽  
N. Perry ◽  
Stéphane Sire ◽  
Surendar Marya
Keyword(s):  
Case Studies ◽  
Stainless Steels ◽  
Arc Welding ◽  
Gta Welding ◽  
Carbon Steels ◽  
Width Ratio ◽  
Gas Tungsten Arc ◽  
Titanium Aluminum ◽  
Flux Composition ◽  
Weld Depth

Flux applications prior to the convention Gas Tungsten Arc Welding (GTAW) is known to improve weld penetrations and improve process competitiveness. This paper summarizes the investigations on aluminum, plain carbon steels, stainless steels and titanium. The importance of flux composition, homogeneity and profile of its application are shown to be primordial in determining the weld depth to width ratio of weld pools. The mechanisms that lead to improved penetrations along with some industrial case studies are presented.Key Words: ATIG, Weld penetrations, Steels, Titanium, Aluminum

Heat Transfer Modelling and Investigation of the Effect of Pulse Frequency and Current in Pulsed Current Gas Tungsten Arc Welding

2014 ◽  
Vol 592-594 ◽  
pp. 395-399
Author(s):  
A. Prabakaran ◽  
R. Sellamuthu ◽  
Sanjivi Arul
Keyword(s):  
Heat Transfer ◽  
Weld Pool ◽  
Arc Welding ◽  
Gta Welding ◽  
Gas Tungsten Arc Welding ◽  
Transfer Model ◽  
Pulsed Current ◽  
Current Frequency ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

Gas Tungsten Arc Welding (GTAW) involves several process parameters. In Pulsed Current GTAW frequency of pulse and pulse to time ratio differentiates the characteristics of weld pool geometry of from GTAW. In the present work a simple heat transfer model for Pulsed Current GTA welding was developed and the weld pool dimensions were experimentally verified with AISI 1020 steel. Relationship between speed and pulsed current frequency on weld pool dimension was studied. Weld pool dimension of pulsed and non-pulsed GTAW is studied.

scholarly journals A Study of the Weldability of Gamma Prime Hardened Superalloys

2011 ◽  
Vol 278 ◽  
pp. 434-439 ◽  
Author(s):  
Alexander Schnell ◽  
Matthias Hoebel ◽  
Jeff Samuleson
Keyword(s):  
Arc Welding ◽  
Thermal Gradient ◽  
Physical Parameters ◽  
Weld Repair ◽  
Gamma Prime ◽  
Gas Tungsten Arc ◽  
Solidification Speed ◽  
Solidification Parameters ◽  
The Impact ◽  
Highly Loaded

Fusion repair processes such as gas tungsten arc welding (GTAW) and laser welding have been introduced for repairing turbine parts made from Ni-based superalloy materials. The weld-repair of turbine parts is well established, however, the inherent susceptibility of ’ hardened superalloys to weld cracking remains an issue and has resulted in repair limitations for highly loaded areas of turbine parts. This study presents a view of the weldability of superalloys taking both, the impact of the weld process and the weld filler selection into consideration. This comprises the interpretation of specific process parameters into physical parameters controlling the weldability and cracking sensitivity such as thermal gradient in the weld pool and solidification speed. Alloy specific parameters of the weld filler material, such as melting point and solidification interval are studied and set in correlation with the solidification parameters during welding.

Heating Characteristics of Gas Tungsten Arc Welding of Copper Thick Plates with Shielding Gas of Argon, Helium or Nitrogen

2007 ◽  
Vol 353-358 ◽  
pp. 2096-2099 ◽  
Author(s):  
Jiu Chun Yan ◽  
Yi Nan Li ◽  
Wei Wei Zhao ◽  
Shi Qin Yang
Keyword(s):  
Welded Joints ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Rise Velocity ◽  
Shielding Gas ◽  
Welding Temperature ◽  
Thick Plates ◽  
Gas Tungsten Arc ◽  
Gas Tungsten ◽  
Weld Pools

The welding temperature patterns of gas tungsten arc welding for copper thick plates during Ar, He or N2 shielded arc welding were simulated, and the size of weld pools and heat-affected zones have been compared. It was predicted that the heat-affected zone in the welded joints during Ar arc welding is the widest and that during N2 arc welding is the narrowest, while the size of weld pools using Ar (preheating at 400°C), He and N2 (without preheating) shielding arc welding is very similar. Among the three kinds of gases shielded arc welding, the temperature gradient of welded joints during Ar arc welding is the least and that during N2 arc welding is the greatest. The temperature rise velocity at the arc center during N2 arc welding is the highest, and those at the zone close to the weld pool of welded joints during He arc and N2 arc welding are a few higher than that during Ar arc welding.

Numerical Analysis of Gas Tungsten Arc Welding with a Constricted Nozzle for Butt Joint of Thin-Sheet Metals

2014 ◽  
Vol 922 ◽  
pp. 383-387
Author(s):  
Kyohei Konishi ◽  
Manabu Tanaka ◽  
Akihisa Murata ◽  
Tadasuke Murata
Keyword(s):  
Arc Welding ◽  
Thin Sheet ◽  
Welding Process ◽  
Gta Welding ◽  
Butt Joint ◽  
Gas Tungsten Arc Welding ◽  
Sheet Metals ◽  
Gas Tungsten Arc ◽  
New Process ◽  
Gas Nozzle

GTA (Gas Tungsten Arc) welding process has been studied as a higher level welding process. The “GTA welding process with constricted nozzle” is one of new welding processes [1]. In this new process, arc stiffness is greatly improved by attaching an additional gas nozzle which is called “constricted nozzle” inside the shielding gas nozzle. The design of a constricted nozzle is shown in Figure 1. With this new process, a butt joint of thin-sheet metals can be achieved although that is difficult with a conventional GTA welding process. In this study, numerical simulation is conducted to understand phenomena of arc plasma in a GTA welding process with a constricted nozzle scientifically.

Determination of Melting Efficiency of Mild Steel in GTA Welding Process

2014 ◽  
Vol 592-594 ◽  
pp. 139-143 ◽  
Author(s):  
G. Sathish Kumar ◽  
R. Sellamuthu ◽  
Sanjivi Arul
Keyword(s):  
Mild Steel ◽  
Arc Welding ◽  
Welding Process ◽  
Gta Welding ◽  
Gas Tungsten Arc Welding ◽  
Current Speed ◽  
Arc Length ◽  
Electrode Diameter ◽  
Gas Tungsten Arc

In this study, a model for the melting efficiency of Gas tungsten arc welding (GTAW) was developed and validated using experiments. It was found that the melting efficiency increases with current, speed, arc length and electrode tip angle. The melting efficiency is found to be stable with increase in electrode diameter. The results were compared with existing studies.

Microstructure and Properties of Dissimilar Metals Welded Joint of New Tamping Tine Steel for Railways Maintenance

2013 ◽  
Vol 774-776 ◽  
pp. 1149-1154
Author(s):  
Yan Jun Zhao ◽  
Zhi Liu Hu ◽  
Li Mi ◽  
Xue Ping Ren ◽  
Sheng Xu Liu
Keyword(s):  
Mechanical Properties ◽  
Carbon Dioxide ◽  
Impact Toughness ◽  
Heat Affected Zone ◽  
Arc Welding ◽  
Welded Joint ◽  
Dissimilar Metals ◽  
Brittle Layer ◽  
The Impact ◽  
Impact Ductility

The microstructure and mechanical properties of welded joint between 20SiMn3NiA and 40CrNiMo were studied by carbon-dioxide arc welding. According to the principle of low strength matching of dissimilar metals weld, the strength of the welded joint is 60% of that of 20SiMn3NiA, and the impact toughness reaches 60% of parent metal’s toughness. Also the impact ductility is high enough to meet the applications of divided structure tamping tine when the strength of welded joint is properly lower than that of 20SiMn3NiA. Furthermore the performances of fusion zone are worse than welded joint and heat-affected zone for martensitic brittle layer was formed during the welding of 20SiMn3NiA and 40CrNiMo.

scholarly journals Influences of Groove Angles and Filler Metals on 304L Stainless Steel to AISI 1040 Carbon Steel Dissimilar Joint by Gas Tungsten Arc Welding

2019 ◽  
Vol 130 ◽  
pp. 01008
Author(s):  
Eriek Wahyu Restu Widodo ◽  
Vuri Ayu Setyowati ◽  
Suheni ◽  
Ahmad Rilo Hardianto
Keyword(s):  
Tensile Strength ◽  
Stainless Steel ◽  
Carbon Steel ◽  
Pressure Vessel ◽  
Arc Welding ◽  
Filler Metal ◽  
Gas Tungsten Arc Welding ◽  
304L Stainless Steel ◽  
Gas Tungsten Arc ◽  
Filler Metals

Dissimilar joint commonly applied on pressure vessel application in power plan field as joining between the tank and the stanchion of pressure vessel. This paper presents the investigations carried out to study the influence of groove angles and filler metals on 304L Stainless Steel to AISI 1040 Carbon Steel dissimilar joints. Gas Tungsten Arc Welding with 120 A of current was used on this research, joined the two different metals. The 30°, 45°, and 60° were used in this welding as parameters of V-groove angles. ER 308L-16 filler metal of stainless steel and ER 70S-6 filler metal of carbon steel were used as filler metals. Tensile test was conducted to obtain tensile strength of joint and to analysis of the effect of the welding parameters to the mechanical properties. The highest tensile strength was obtained from the 60° groove angle using ER 308L-16 filler metal of 614.54 MPa. In the other hand, 45° groove angle using ER 70S-6 filler metal obtained the lowest tensile strength of 578.66 MPa. The joining process of dissimilar welding using ER 308L-16 filler metal, filler metal for stainless steel, has obtained the highest tensile strength with wider groove angle as well.

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