Effect of alternating shielding gases in gas metal arc welding of SA515 Gr 70 carbon steel
The influence of alternating shielding gas on fusion characteristics and weld metal characteristics was examined using a solid wire electrode on SA515Gr 70 carbon steel (ER70S).To improve the efficiency of the traditional GMAW process, two shielding gases of Argon and CO _2 were supplied independently to the GMAW torch using a gas alternator unit w