Effect of Different Purging Gases on Weld Geometry and Mechanical Properties of 304L Stainless Steel Using GTAW Technique

Authors

  • Taher Abani Advanced Occupational Center for Welding Technologies, Tripoli, Libya
  • Azaldin Alhaj Kozam Advanced Occupational Center for Welding Technologies, Tripoli, Libya
  • Khaled Gewa Advanced Occupational Center for Welding Technologies, Tripoli, Libya
  • Mohamed Saraj Advanced Occupational Center for Welding Technologies, Tripoli, Libya
  • Hesham Eshabani Advanced Occupational Center for Welding Technologies, Tripoli, Libya

Keywords:

Shielding Gases, Purging Gas, Mechanical Properties, Austenitic, Microstructure

Abstract

Stainless steel is used in many applications due to its resistance to corrosion. When welding austenitic stainless steel, the weld seam is exposed to heat and air, which causes oxidation.  Purging is an important step to obtain high quality and prevent oxidation and thus avoiding discoloration and welding under bead discontinuities. The right purging gas is essential for getting the best results. The purpose of this study is to determine how different purging gases, such as pure nitrogen, pure argon, and a mixture of 26% N2, 4% Co2, and 70% He, affect the mechanical properties of 304 L austenitic stainless steel welds, including their tensile strength, yield strength, and hardness. The results of this study show that as no significant differences in properties have been found, it may be concluded that all named gases can be used as purging gases in the welding of austenitic stainless steels.

 

 

Author Biographies

Taher Abani, Advanced Occupational Center for Welding Technologies, Tripoli, Libya

 

 

Azaldin Alhaj Kozam, Advanced Occupational Center for Welding Technologies, Tripoli, Libya

 

 

Khaled Gewa, Advanced Occupational Center for Welding Technologies, Tripoli, Libya

 

 

Mohamed Saraj, Advanced Occupational Center for Welding Technologies, Tripoli, Libya

 

 

Hesham Eshabani, Advanced Occupational Center for Welding Technologies, Tripoli, Libya

 

 

Dimensions

Published

2023-04-22

How to Cite

Taher Abani, Azaldin Alhaj Kozam, Khaled Gewa, Mohamed Saraj, & Hesham Eshabani. (2023). Effect of Different Purging Gases on Weld Geometry and Mechanical Properties of 304L Stainless Steel Using GTAW Technique. African Journal of Advanced Pure and Applied Sciences (AJAPAS), 2(2), 96–102. Retrieved from https://aaasjournals.com/index.php/ajapas/article/view/320