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Bending of Cold Worked Mild Steel Due to Different Welding Processes. Josh Kelly and Matt Lewis ENGR 45 SRJC Fall ‘05. Preparation & Material Used. Tinius Olsen Tensile Machine Cold Worked Mild Steel 3/8 x 3 x 6 in. Welding Processes. Arc MIG Dual Shield. Arc Welding. E-7024 Rod

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bending of cold worked mild steel due to different welding processes

Bending of Cold Worked Mild SteelDue to Different Welding Processes

Josh Kelly and Matt Lewis

ENGR 45

SRJC

Fall ‘05

preparation material used
Preparation & Material Used
  • Tinius Olsen Tensile Machine
  • Cold Worked Mild Steel 3/8 x 3 x 6 in.
welding processes
Welding Processes
  • Arc
  • MIG
  • Dual Shield
arc welding
Arc Welding
  • E-7024 Rod
  • AC @ 135 Amps
  • 70,000 lb Tensile Material ESI
slide5
MIG
  • Metal inert gas (MIG) 25% CO2 75% Argon Gas
  • 0.035 wire, 70 volts, 140 amps DC+
  • 70,000 lb Tensile Material ESI
self shielded flux cored arc welding dual shield
Self-shielded Flux-Cored Arc-Welding (Dual Shield)
  • 0.045 Wire, 23 volts, 175 Amps DC+
  • 70,000 lb Tensile Material ESI
flexural strength vs deflection flex strength 3 force length 2 width height 2
Flexural Strength vs. DeflectionFlex. Strength = 3 * Force * Length 2 * Width * height 2
  • Heat Relief @ 400 Degrees F for 2.5 hours
slide8

Flexural Strength vs. DeflectionFlex. Strength = 3 * Force * Length 2 * Width * height 2Focus on elastic region

conclusions
Conclusions
  • Stress relief affected samples differently
  • Hardness not a factor since all same material
  • Flexural strength did not change due to the type of weld used on sample
references
References
  • http://www.lincolnelectric.com/knowledge/articles/content/arcweldfund.asp
  • http://www.alu-info.dk/Html/alulib/modul/A00526.htm
  • http://en.wikipedia.org/wiki/Welding
  • http://www.lincolnelectric.com/knowledge/articles/content/hypipe3.asp
  • http://www.engineersedge.com/strength_of_materials.htm