Welding Techniques

Welding is a joining process in which metals, or plastics, are heated, melted and mixed to produce a joint with properties similar to those of the materials being joined.

There are three main components needed to create a weld. These are:

• A heat source such as an electric arc, a flame, pressure, or friction. The most common heat source is an electric arc.
• Shielding, which is the use of gas, or another substance to protect the weld from air as the weld is being formed. 
• Filler material, which is the material used to join to the two pieces together.

Other processes that join metals together include:

• Brazing is the joining of metals with a filler metal having a melting point above 450°C (842°F), but below the melting point of base metals. 
• Soldering is the joining of metals using a filler metal with a melting point below 450°C (842°F). The joined metals can be different metals. 

For more information about welding, the Canadian Fabricating and Welding Magazine offers a great series of videos on different topics of interest including automation software, cutting tools, fabricating, health & safety, metal finishing and metalworking. Check them out!

Another important aspect for welders is the Red Seal Program. If you would like to know more about the Red Seal Occupational Standard, the Essential Skills and Job Market Reports, read more from the link.

From: CCOHS: Welding - Overview of Types and Hazards