weld 1100 - shielded metal arc welding - College of Eastern Utah
weld 1100 - shielded metal arc welding - College of Eastern Utah
weld 1100 - shielded metal arc welding - College of Eastern Utah
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Functions <strong>of</strong> the Electrode<br />
Covering (flux):<br />
Decomposition <strong>of</strong> the electrode cover (during <strong>weld</strong>ing)<br />
provides a shielding gas (generally CO, CO 2, H 2 or even H 2O)<br />
to prevent air from contaminating the <strong>weld</strong> pool.<br />
Provides scavenging, deoxidizing and fluxing agents to<br />
cleanse <strong>weld</strong>, prevent excessive grain growth and improve<br />
wetting action. (See next slide)<br />
Determines the electrical characteristics <strong>of</strong> the electrode<br />
(ionization potential <strong>of</strong> the shielding gas determines AC/DC).<br />
Produces a slag blanket to protect the solidified <strong>weld</strong>.<br />
Influences the mechanical properties and bead shape.<br />
Provides a method for introducing alloying elements and<br />
thereby effect the mechanical and/or corrosion properties.
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