Arc Welding
Arc welding is a thermal joining process where the heat to melt the materials is supplied by an electric arc. It generates high temperatures and enables fast melting and cooling.
Physical-Chemical Mechanism of Action
The arc generates extreme temperatures through the introduction of electric currents that occur in a gas. This leads to a strong discharge and the emission of high-energy light and heat.
Metallurgical Relevance & Risks in Welding
Arc welding is especially suitable for thin sheets and fine joining work. It prevents the surrounding material from melting and produces a clean, smooth joint. However, it can lead to hot cracks if the weld cools too quickly or if the arc is not set correctly.
Workshop Practice & Instructions for Action
Use a stable arc welder and adjust the voltage and currents to the material type. Make sure the welding machine is correctly calibrated and that the arc is guided by a stable electrode. Use appropriate protective equipment and pay attention to protecting the surrounding material.