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Welding as a method in repair work

Welding methods vary. Stands out: Popular welding methods

  • gas,
  • timely,
  • electric,
  • laser,
  • hybrid.

Gas welding

It is called an autogen. This type of welding was dealt with in the first half of the 19th century. This is the primary method of joining metals. Its advantages include a simple technique, low cost of the device, a large area of welded thicknesses, as well as high efficiency. One should also bear in mind the disadvantages, such as the high cost of operating gases, difficulties with welding aluminum, poor aesthetics of the welds. Gas welding is used in renovation or repair works. For example, thin pipes, e.g. heating installations, water installations or gas installations, can be welded. The gas welding method fits perfectly to the terrain conditions. Acetylene is the most widely used gas for gas welding.

The features of an oxy-acetylene flame are:

  • very high temperature, i.e. 3100 degrees Celsius
  • deoxidizing property of the middle flame
  • quite the right power
  • simple flame adjustment

Welding on time

Another popular method of welding is term welding, also known as aluminothermic welding. The heat source is thermite combustion. Thermite was originally used as a fuel to produce pure metals without the use of carbon. Timely welding is used in the repair of steel journals, cracked shafts, casting defects, as well as for joining railway rails and any cast iron or steel objects.

Laser welding

This - the most modern welding technique. A laser beam is used in this welding. It has a high energy density. Laser welding is used for refractory metals, titanium, aluminum, alloy steels, and carbon steels. High efficiency is a great advantage of laser welding, which is competitive to other advanced processes, e.g. electron welding.

Hybrid welding

The combination of arc welding and laser welding makes it possible to obtain welds that are more flexible compared to conventional laser welding. The speed of the process is maintained. Hybrid welding is widely used, among others, in the shipbuilding or car body industry. Hybrid welding is also called HLAW (hybrid laser arc welding). This method has the advantages of laser welding as well as the GMA method. It is a very effective way of joining materials.

Electric welding

It is the most popular. Its advantages are economy and strength of joints. There are gas-shielded welding, covered arc welding, welding with coated electrodes, arc welding with a non-consumable electrode.

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