Overview of Welding
Welding joins materials, usually metals or thermoplastics, using high heat to melt parts together. This process involves weld joints and welding types. Welding differs from low-temperature metal-joining techniques such as brazing & soldering. In addition to melting the base metals, filler materials are added to the joint to form a molten pool. Pressure can also be used with heat to form the weld. Welding requires shielding to prevent contamination or oxidation.
Types of Welding
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MIG Welding
- Also known as metal inert gas welding, it is one of the easiest types for beginners to learn. MIG welders use a feed wire that runs through the machine at a preselected speed, making the process relatively fast and producing consistent welds. A shielding gas also protects the weld pool from contamination.
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Flux-Cored Arc Welding
- This type of welding has a heavy deposition rate and a more stable arc compared to other processes. It can be used outdoors without gas shielding.
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TIG Welding
- TIG welding creates visually appealing welds without cleanup or spatter. It is considered difficult and best for experienced welders.
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Stick Welding
- Uses an electric arc to generate heat, melting metal to be joined. The electrode can be a wire, rod, or sheet of metal. The welder creates an arc between metals to be joined.
Applications of Welding
Welding plays vital roles in industries like automotive, construction, and manufacturing. Tools used depend on the type of welding process being employed. Arc welding creates the strongest weld, while spot welding efficiently joins metal sheets, particularly in the automotive industry. Hand tools are utilized for adjustments ensuring weld quality.