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Welding Processes A Presentation by Neil Cox
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A Presentation by Neil Cox. GMAW or MIG/Hardwire SMAW or Stick GTAW or TIG/Heliarc OAW Picture Source.

Dec 22, 2015

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Page 1: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

Welding Processes A Presentation by Neil Cox

Page 3: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

Gas Metal Arc Welding (GMAW) Uses a “welding

gun” to deposit weld metal to weld area

4 settings based on voltage and wire speed

Most common settings are Short Circuit and Spray Transfer

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Page 4: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

GMAW cont.

Weld parameters are dictated by voltage and wire feed speed

Different thickness of wire and types of wire can be used

Requires a shielding gas during welding to prevent air born weld contaminations

Page 5: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

GMAW Welds

GMAW is commonly used due to its fast production speeds and ease of learning the skill

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Page 6: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

Shielded Metal Arc Welding (SMAW)

Commonly called “Stick” welding

Uses a 14” metal rod covered in a layer of “flux”

Flux is made of different elements and materials depending on weld metal

Settings are changed via amperage

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Page 8: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

SMAW Rods

Most common stick rods are: 6010/6011- Used for root passes

generally. A deep-digging rod that can burn through rust easily.

7018- A higher tensile strength rod usually used for cleaned steel for a harder and smoother bead than 6010.

Page 10: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

Gas Tungsten Arc Welding (GTAW)

Used for precision welds in a clean environment

Uses an electric torch and filler metal to deposit a precise weld bead on nearly any metal

Can be used on steel and stainless steel as well as copper, magnesium, nickel, titanium, aluminum and more.

Page 11: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

GTAW cont.

GTAW is commonly used in the aerospace and marine industry

It is among the slowest welding processes, but is also the most versatile

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Page 12: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

GTAW Welds

GTAW can be the slowest welding process, but when done right can be one of the most cosmetically pleasing

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Page 13: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

Oxy/Acetylene Welding (OAW)

Oxy/Acetylene Welding uses a flame to heat the weld metal

There is no electricity involved Oxygen and a combustible gas are

mixed and adjusted to create the necessary heat for the weld

Page 14: A Presentation by Neil Cox.  GMAW or MIG/Hardwire  SMAW or Stick  GTAW or TIG/Heliarc  OAW Picture Source.

OAW cont.

OAW is a slow process that is not used much in industry due to the newer processes being discovered

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