The effect of shielding gas composition on welding performance and weld properties in hybrid CO2 laser–gas metal arc welding of carbon manganese steel

2006 ◽  
Vol 18 (1) ◽  
pp. 12-20 ◽  
Author(s):  
Anna Fellman ◽  
Veli Kujanpää
Keyword(s):  
Co2 Laser ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Manganese Steel ◽  
Gas Composition ◽  
Shielding Gas ◽  
Metal Arc Welding ◽  
Weld Properties

Mechanical Properties of Gas Metal Arc Weldments of AISI 304 Stainless Steel Using Different Shielding Gas Compositions

2021 ◽  
Vol 54 ◽  
pp. 1-11
Author(s):  
Augusta Ijeoma Ekpemogu ◽  
Olamide Emmanuel Ariwoola ◽  
Akeem Abiodun Rasheed ◽  
Oladipupo Akinleye Ogundele ◽  
Taiwo Ebenezer Abioye ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
304 Stainless Steel ◽  
Gas Composition ◽  
Shielding Gas ◽  
Aisi 304 Stainless Steel ◽  
Aisi 304 ◽  
Metal Arc Welding

In this work, gas metal arc welding of AISI 304 stainless steel at varying compositions of argon-CO2 shielding environment was performed using an established optimum parametric combination. Thereafter, investigations on the microstructure of the welded joints and mechanical properties of the weldments were carried out. Weldments of excellent surface quality that are void of spatters and pores were obtained when the shielding gas composition (wt.%) range is between 100% argon and 75% argon - 25% CO2. Increasing percentage composition of CO2 beyond 25% resulted in irregular bead formation characterized with spatters and pores. The hardness of the welded joint became significantly high as the CO2 composition in the shielding gas increased. The highest value of 310 HV was obtained when the shielding gas composition was 5% argon- 95% CO2. The least (220 HV) was obtained when the shielding gas was 100% argon. High ultimate tensile strength (596 - 378 MPa) was achieved when the shielding gas composition range is between 100% argon and 75% argon-25% CO2. The UTS dropped significantly as the CO2 composition in the shielding gas increased beyond 25%. It decreased from 336 MPa at 70% argon-30% CO2 shielding gas composition to 133 MPa when 100% CO2 was utilized as the shielding gas. At the end, the effects of the CO2 addition and suitable composition of CO2 addition to argon shielding environment during GMAW of AISI 304 stainless steel have been established.

scholarly journals Effect of shielding gas composition on gas metal arc welding phenomena using rare earth metal added wire

2020 ◽  
Vol 38 (4) ◽  
pp. 438-447
Author(s):  
Manabu TANAKA ◽  
METHONG Titinan ◽  
Hisaya KOMEN ◽  
Masaya SHIGETA ◽  
Tokihiko KATAOKA ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Metal ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Earth Metal ◽  
Gas Composition ◽  
Shielding Gas ◽  
Metal Arc Welding

Effect of Shielding Gas Mixture on Gas Metal Arc Welding (GMAW) of Low Carbon Steel (LR Grade A)

2016 ◽  
Vol 705 ◽  
pp. 250-254 ◽  
Author(s):  
Yustiasih Purwaningrum ◽  
Triyono ◽  
M. Wirawan Pu ◽  
Fandi Alfarizi
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Carbon Steel ◽  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Low Carbon Steel ◽  
Low Carbon ◽  
Shielding Gas ◽  
Weld Metals ◽  
Metal Arc Welding

The aimed of this research is to determine the feasibility and effect of the mixture of the shielding gas in the physical and mechanical properties. Low carbon steel LR grade A in a thickness 12 mm were joined in butt joint types using GMAW (Gas Metal Arc Welding) with groove’s gap 5 mm and groove angle’s 400 with variation of shielding gas composition. The composition of shielding gas that used were 100% Ar, 100 % CO2 and 50% Ar + 50 % CO2. The measured of mechanical properties with regard to strength, hardness and toughness using, tensile test, bending test, Vickers hardness Test, and Charpy impact test respectively. The physical properties examined with optical microscope. Results show that tensile strength of welding metals are higher than raw materials. Welds metal with mixing Ar + CO shielding gas has the highest tensile strength. Hardness of weld metals with the shielding gas 100% Ar, 100 % CO2 and 50% Ar + 50 % CO2 are 244.9; 209.4; and 209.4 VHN respectively. The temperature of Charpy test was varied to find the transition temperature of the materials. The temperature that used were –60°C, -40°C, -20°C, 0°C, 20°C , and room temperature. Weld metals with various shielding gas have similar trends of toughness flux that was corellated with the microstructure of weld .

scholarly journals Visualisation and optimisation of shielding gas coverage during gas metal arc welding

2018 ◽  
Vol 255 ◽  
pp. 451-462 ◽  
Author(s):  
I. Bitharas ◽  
N.A. McPherson ◽  
W. McGhie ◽  
D. Roy ◽  
A.J. Moore
Keyword(s):  
Arc Welding ◽  
Gas Metal Arc Welding ◽  
Shielding Gas ◽  
Metal Arc Welding
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