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Home / Smaw Welding Free Reading Material & Worksheets

Smaw Welding Free Reading Material & Worksheets

Welding is a fabrication process where ii or more than parts are fused together past the employof heat, pressure, or both, forming a join equally the parts absurd. Welding is usually used on metals and thermoplastics but can also be used on wood.

Hither we will discuss some of the most common welding techniques used in the industry and where they are used.

Note that the types of welding mentioned here employ just to metals. The following are the virtually common metalworking weld methods in use today.

1. Arc welding is a very widespread course of welding

types of welding arc
Source: Ricardo Ghisi Tobaldini/Flickr

As the name suggests, arc welding uses an electric arc to cook materials before joining them together. A ability supply is used to create an electric arc is betwixt an electrode (which can exist either consumable or non-consumable) and the base metal to melt the metals at the betoken of contact.

The welding area is usually protected past some type ofshielding gas, vapor, or slag. This is considering the atmospheric air can interact with the weld pool and cause oxidation.

This electrical arc tin can create temperatures upwards of 6300°F (3500°C), which is high plenty to cook metals like carbon steel.

There are unlike types of arc welding, such every bit shielded metallic arc welding (SMAW), flux-cored arc welding (FCAW), submerged arc welding (SAW), plasma arc welding (Hand) to exemplify.

Applications of arc welding:

  • Shipbuilding
  • Automotive industries
  • Structure industries
  • Mechanical industries

Advantages of Arc welding:

  • Suitable for high-speed welds
  • Simple welding appliance
  • Portability as a result of the simple equipment
  • Can work on AC or DC
  • Superior temperatures

Disadvantages of arc welding:

  • Not suitable for welding sparse metals
  • Requires skilled welders
  • Cannot exist used for reactive metals like Aluminum or Titanium

2. MIG (metal inert gas) welding has many applications

types of welding MIG
Source: rawdonfox/Flickr

MIG or metal inert gas welding is another welding method that uses an electric arc to create welds. All the same, MIG uses a continuous solid wire electrode, which is heated and fed into theweld puddle from awelding gun. The two base materials are melted together, forming a join.

In MIG welding, the melted electrode facilitates the joining of the two metals. Hence, MIG is ideal for joining unlike metals. Shielding gas is as well supplied through the weld gun to ensure that the weld pool does not interact with the air, oxidizing the weld area.

Some of the popular applications of MIG welding:

  • Used for near types of sheet metal welding
  • Fabrication of pressure level vessels and steel structures
  • Automotive industry and home improvement industry

Advantages of MIG welding:

  • Creates high-quality welds
  • Minor weld splatter
  • Can be used to join dissimilar metals
  • Can exist fully or semi-automatic
  • Good weld speed

Disadvantages of MIG welding:

  • Unsuitable for outside welding
  • Unsuitable for thick metals
  • Needs metal preparation

3. Another important welding technique is TIG (tungsten inert gas) welding

types of welding TIG
Source: Becky Stern/Flickr

Tungsten inert gas welding (TIG) uses anot-consumable tungsten electrode to create an arc between the metals.The weld area and electrode are protected from oxidation or other atmospheric contagion by an inert shielding gas, such as argon or helium. Afiller metal is as well sometimes used.

TIG welding can work on both AC and DC power sources. Ane of the greatest strengths of TIG welding is that it tin be used for welding non-ferrous metals like aluminum, copper, magnesium, copper, nickel, titanium, etc.

Some of the popular applications of TIG welding include:

  • Aerospace and shipping construction
  • Automotive manufacture
  • Auto trunk repairs

Advantages of TIG welding:

  • Very make clean welds
  • Offers a loftier caste of control to the welder
  • Can exist used with or without filler cloth
  • Can be done in manual or automatic methods
  • Creates strong welds

Disadvantages of TIG Welding:

  • Time-consuming
  • Needs skilled welders
  • Cannot exist used for thicker metal joints

four. Flux-cored arc welding (FCAW) is pretty cool

types of welding FCAW
Source: Orbital Joe/Flickr

Flux-cored arc welding (FCAW) uses a continuous wire fed electrode, a abiding-voltage welding power supply, and similar equipment to Magazine welding.There are two types of flux cored arc welding — Self-Shielded and Gas-Shielded Flux-Cored welding.

The FCAW procedure can exist divided into two types depending on the shielding method; 1 that uses an external shielding gas and one that solely relies on the flux core itself for protecting the weld area.

The shielding gas, where used, protects the weld pool from oxidation and is ordinarily provided externally from a high-force per unit area gas cylinder. Weld metallic is besides shielded by the slag germination from flux melting.

Where an external shielding gas is not used, the procedure relies  instead on the protection offered past the flux-cored electrode itself. This electrode provides gaseous protection and also forms a slag that covers and protects the molten metal in the weld.

Some of the popular applications of flux cored arc welding are:

  • Manufacturing plants
  • Shipbuilding
  • Industrial piping
  • Railroads
  • Maintenance and repair

Advantages of flux cored arc welding:

  • Excellent weld penetration
  • Suitable for thicker joints
  • Flexibility in terms of torch movement and orientation
  • The highest metal deposition rate

Disadvantages of flux cored arc welding:

  • Can result in slag inclusion
  • Flux-cored wires are more expensive
  • Weld is often not aesthetically pleasing

v. Gas welding (oxyacetylene welding)

types of welding gas
Source: Chetan Bisariya/Flickr

Gas welding uses the oestrus from a full-bodied flame to melt metals and then join them. Gas welding is possible with or without filler metallic.

The flame is controlled using a welding torch. An oxygen gas canister and a fuel gas canister is connected to the welding torch. The welder can control the flame by controlling the number of gases fed to the torch using a pressure regulator.

Most normally, nosotros encounter a gas combination of oxygen and acetylene, which is capable of producing3200°C ( 5792 oF ). Other fuel gases that are besides seen in gas welding are hydrogen, butane, and propane.

Some of the popular applications of gas welding are:

  • Fabrication of canvas metal
  • Automobile and aircraft industries
  • Joining ferrous and non-ferrous metals
  • Joining thin metals

Advantages of gas welding:

  • Easily portable equipment
  • Superior flame control
  • Low toll and maintenance
  • Tin can likewise be used for Gas Cut
  • Cheaper equipment cost

Disadvantages of gas welding:

  • Not suitable for very thin sections
  • Lower temperatures than arc welding
  • Harder to flux shield
  • No suitable for reactive metals

If this article has piqued your involvement, so remember that welding is a vast field where new material joining techniques are consistently being developed. This is non but interesting in its own right, but welding is a vitally important field as much of the machinery that nosotros utilize to create complex and common items require some form of welding.

For this reason, welding volition probable remain an important function of various industries for many years to come up.

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Source: https://interestingengineering.com/types-of-welding-their-applications-advantages-and-disadvantages