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Bending of Cold Worked Mild Steel Due to Different Welding Processes

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

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  1. Bending of Cold Worked Mild SteelDue to Different Welding Processes Josh Kelly and Matt Lewis ENGR 45 SRJC Fall ‘05

  2. Preparation & Material Used • Tinius Olsen Tensile Machine • Cold Worked Mild Steel 3/8 x 3 x 6 in.

  3. Welding Processes • Arc • MIG • Dual Shield

  4. Arc Welding • E-7024 Rod • AC @ 135 Amps • 70,000 lb Tensile Material ESI

  5. MIG • Metal inert gas (MIG) 25% CO2 75% Argon Gas • 0.035 wire, 70 volts, 140 amps DC+ • 70,000 lb Tensile Material ESI

  6. Self-shielded Flux-Cored Arc-Welding (Dual Shield) • 0.045 Wire, 23 volts, 175 Amps DC+ • 70,000 lb Tensile Material ESI

  7. Flexural Strength vs. DeflectionFlex. Strength = 3 * Force * Length 2 * Width * height 2 • Heat Relief @ 400 Degrees F for 2.5 hours

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

  9. Flexural Strength vs. DeflectionHeating To Relieve Stress

  10. Flexural Strength vs. DeflectionHeating To Relieve Stress-Arc Welding

  11. Flexural Strength vs. Deflection Heating To Relieve Stress-Dual Shield Welding

  12. Flexural Strength vs. DeflectionHeating To Relieve Stress-MIG Welding

  13. 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

  14. 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

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