Definition - What does Induction Welding mean?
Induction welding is a type of welding that fuses two or more metals together using the resistive heat caused by changing electromagnetic fields, otherwise known as induction. During induction welding, a work piece is surrounded by conductive coils. The changing magnetic field is typically induced through the use of an alternating current that runs through the conductive coils.
Corrosionpedia explains Induction Welding
Induction welding can work for both magnetic and non-magnetic work pieces. Magnetic pieces may be more rapidly heated because the magnetic forces acting upon them add to the energy already created through resistance. Materials with iron also have increased resistance as the temperature increases, so as soon as a steel or cast iron object is heated, heating it further will become even easier to do. The hardest metals to weld with the induction welding process are materials that are non-magnetic and extremely good conductors.
Induction welding has several benefits. One such benefit is that no contact is made with the work piece. The coils typically have an air gap between themselves and the work piece, which reduces the risk of coil wear and part contamination. Another benefit of induction welding is that long, continuous welds (e.g., tube seams) can be made very rapidly.