كتاب (GMAW) Gas Metal Arc Welding Guide

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GMAW Welding Guide
Gas Metal Arc Welding
Carbon, Low Alloy, and Stainless Steels and Aluminum

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History of Gas Metal Arc Welding (GMAW) .6
Modes of Metal Transfer .7-10
Short-Circuit Transfer .7
Globular Transfer .8
Axial Spray Transfer .9
Pulsed Spray Transfer .10
Components of the Welding Arc .11
Shielding Gases for GMAW .12-15
Inert Shielding Gases .12
Reactive Shielding Gases .12-13
Binary Shielding Gas Blends .13-14
Ternary Shielding Gas Blends .14
GMAW Shielding Gas Selection Guide .15
Effects of Variable .16-17
Current Density .16
Electrode Efficiencies .16
Deposition Rate .16-17
Electrode Extension and CTWD .17
Advanced Welding Processes for GMAW .18-19
Waveform Control Technology™ .18-19
The Adaptive Loop .20-21
Advanced Waveform Control Technology .20
Surface Tension Transfer .20-21
Tandem GMAW .22-23
Features of Tandem GMAW .22
Modes of Metal Transfer for Tandem GMAW .22-23
Equipment for GMAW .24-31
The Power Source .25
The Wire Drive System .26-27
Special Wire Feeding Considerations .28-29
Shielding Gas Regulation .28
Bulk Electrode Packaging .29
Typical GMAW Systems .30-31
Semiautomatic GMAW System .30
Automatic GMAW System .30
Portable Engine Driven GMAW System .31
GMAW Torches .31-33
For Semiautomatic GMAW Welding .31-32
For Hard and Robotic Automation
GMAW of Carbon and Low Alloy Steels .34-39
Selecting Carbon and Low Alloy Electrodes .34
Types of GMAW Carbon and Low Alloy Steel Electrodes .35-36
Mechanical Properties .36
Chemical Composition .37
AWS Specifications for Manufacturing GMAW Wires .38
Selecting Carbon and Low Alloy Electrodes for GMAW .38-39
GMAW of Stainless Steels .40-57
Types of Stainless Steels .40-42
Sensitization .43-44
Hot Cracking .44-45
Precipitation Hardening .46
Duplex Stainless Steels .47
Physical and Mechanical Properties .47-49
Selecting Stainless Steel .49
Corrosion Resistance of Stainless Steels in Various Environments .50
Design for Stainless Steels .51
Selecting Stainless Steel Electrodes for GMAW .52-54
GMAW of Stainless Steels .54-56
GMAW of Aluminum Alloys .57-64
Properties of Aluminum .57
Aluminum GMAW Modes of Metal Transfer .57
Power Supplies and Wire Drives for Aluminum GMAW .58-59
Shielding Gases for Aluminum GMAW .60
Filler Alloy for Aluminum GMAW .60
Aluminum GMAW Welding Techniques .60-61
Filler Metal Selection .62-63
Chemical Composition for Aluminum Wires .63
Selecting Aluminum Electrodes for GMAW .63
Aluminum Filler Metal Guide .64
General Welding Guidelines .65-77
Current vsWire Feed Speed .65-66
General Welding Guidelines .67-77
STT II Welding Guidelines .78-81
For Carbon Steel .78-79
For Stainless Steel .80
For Nickel Alloy and Silicon Bronze .81
For Pipe Root Pass .81
Rapid-Arc Welding Guidelines .82-87
For Solid Wire .82-84
For Metal-Cored Wire .84-86
Application Notes .86-87
Glossary .88-89
Safety Precautions

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