bending of cold worked mild steel due to different welding processes
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
Bending of Cold Worked Mild Bending of Cold Worked Mild SteelSteel
Due to Different Welding Due to Different Welding ProcessesProcesses
Josh Kelly and Matt LewisJosh Kelly and Matt Lewis
ENGR 45ENGR 45
SRJCSRJC
Fall ‘05Fall ‘05
Preparation & Material UsedPreparation & Material Used
• Tinius Olsen Tensile Tinius Olsen Tensile MachineMachine
• Cold Worked Mild Cold Worked Mild Steel 3/8 x 3 x 6 in.Steel 3/8 x 3 x 6 in.
Welding ProcessesWelding Processes
• ArcArc
• MIGMIG
• Dual ShieldDual Shield
Arc WeldingArc Welding
• E-7024 RodE-7024 Rod
• AC @ 135 AmpsAC @ 135 Amps
• 70,000 lb Tensile 70,000 lb Tensile Material ESIMaterial ESI
MIGMIG
• Metal inert gas Metal inert gas (MIG) 25% CO(MIG) 25% CO2 2
75% Argon Gas75% Argon Gas
• 0.035 wire, 70 0.035 wire, 70 volts, 140 amps volts, 140 amps DC+DC+
• 70,000 lb Tensile 70,000 lb Tensile Material ESIMaterial ESI
Self-shielded Flux-Cored Self-shielded Flux-Cored Arc-WeldingArc-Welding (Dual Shield) (Dual Shield)
• 0.045 Wire, 23 0.045 Wire, 23 volts, 175 Amps volts, 175 Amps DC+DC+
• 70,000 lb Tensile 70,000 lb Tensile Material ESIMaterial ESI
Flexural Strength vs. DeflectionFlexural Strength vs. DeflectionFlex. Strength = Flex. Strength = 3 * Force * Length3 * Force * Length 2 * Width * height 2 * Width * height 22
• Heat Relief @ 400 Degrees F for 2.5 hoursHeat Relief @ 400 Degrees F for 2.5 hours
Flexural Strength vs Deflection of Cold Rolled Mild SteelDue to Different Welds and Heating to Relieve Stress
0
20000
40000
60000
80000
100000
120000
0 0.05 0.1 0.15 0.2 0.25 0.3
Deflection (in)
Fle
xura
l Str
eng
th (
PS
I) No Weld
Arc Weld
Dual Shield Weld
MIG Weld
Relieved Arc Weld
Relieved Dual Shield Weld
Relieved MIG Weld
Flexural Strength vs. DeflectionFlexural Strength vs. DeflectionFlex. Strength = Flex. Strength = 3 * Force * Length3 * Force * Length 2 * Width * height 2 * Width * height 22
Focus on elastic regionFocus on elastic region
Flexural Strength vs Deflection of Cold Rolled Mild SteelDue to Different Welds and Heating to Relieve Stress
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
0 0.01 0.02 0.03 0.04 0.05 0.06
Deflection (in)
Fle
xura
l Str
eng
th (
PS
I) No Weld
Arc Weld
Dual Shield Weld
MIG Weld
Relieved Arc Weld
Relieved Dual Shield Weld
Relieved MIG Weld
Flexural Strength vs. Flexural Strength vs. DeflectionDeflection
Heating To Relieve StressHeating To Relieve StressFlexural Strength vs Deflection of Cold Rolled Mild Steel Due
To Type of Weld With Heating to Relieve Stress
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
0 0.02 0.04 0.06 0.08Deflection (in)
Fle
xu
ral S
tren
gth
(P
SI)
Relieved Arc Weld
Relieved Dual Shield Weld
Relieved MIG Weld
No Weld
Flexural Strength vs Deflection of Cold Rolled Mild Steel Due to Type of Weld
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
0 0.01 0.02 0.03 0.04 0.05 0.06 0.07 0.08
Deflection (in)
Fle
xura
l Str
eng
th (
PS
I)Arc Weld
Dual Shield
MIG Weld
No Weld
Flexural Strength vs. DeflectionFlexural Strength vs. Deflection Heating To Relieve Stress-Arc WeldingHeating To Relieve Stress-Arc Welding
Flexural Strength vs Deflection of Cold Rolled Mild Steel using Arc Welded Samples
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
0 0.02 0.04 0.06 0.08Deflection (in)
Fle
xura
l Str
eng
th
(PS
I)
Arc Weld
Relieved Arc Weld
No Weld
Flexural Strength vs. Deflection Flexural Strength vs. Deflection
Heating To Relieve Stress-Dual Shield Heating To Relieve Stress-Dual Shield WeldingWelding
Flexural Strength vs Deflection of Cold Rolled Mild Steel using Dual Shield Welded Samples
010000
2000030000
4000050000
6000070000
8000090000
0 0.02 0.04 0.06 0.08Deflection (in)
Fle
xura
l Str
eng
th
(PS
I)
Dual Shield Weld
Relieved Dual Shield Weld
No Weld
Flexural Strength vs. DeflectionFlexural Strength vs. Deflection Heating To Relieve Stress-MIG Heating To Relieve Stress-MIG
WeldingWeldingFlexural Strength vs Deflection of Cold Rolled
Mild Steel using MIG Welded Samples
0
10000
20000
30000
40000
50000
60000
70000
80000
90000
0 0.02 0.04 0.06 0.08
Deflection (in)
Fle
xura
l Str
eng
th (
PS
I)
MIG Weld
Relieved MIG Weld
No Weld
ConclusionsConclusions
• Stress relief affected Stress relief affected samples differentlysamples differently
• Hardness not a factor Hardness not a factor since all same materialsince all same material
• Flexural strength did not Flexural strength did not change due to the type change due to the type of weld used on sampleof weld used on sample
ReferencesReferences
• http://www.lincolnelectric.com/knowledge/articles/content/arcweldhttp://www.lincolnelectric.com/knowledge/articles/content/arcweldfund.aspfund.asp
• http://www.alu-info.dk/Html/alulib/modul/A00526.htmhttp://www.alu-info.dk/Html/alulib/modul/A00526.htm• http://en.wikipedia.org/wiki/Weldinghttp://en.wikipedia.org/wiki/Welding• http://www.lincolnelectric.com/knowledge/articles/content/hypipe3http://www.lincolnelectric.com/knowledge/articles/content/hypipe3
.asp.asp• http://www.engineersedge.com/strength_of_materials.htmhttp://www.engineersedge.com/strength_of_materials.htm