After some operations a residual magnetism remains in the material which can cause dificulties at further processing or usage.
Manufacture of many devices and parts of equipment made of steel or other ferromagnetic metals causes magnetizing of these products. To provide the highest quality of products it is needed to decrease their magnetization and thereby retain original characteristics of metal. Then we mean demagnetization or degaussing of magnetic materials.
The magnetizing is carried out during performance of NDT inspection, handling with the magnetic crane, when machining of semimanufactured products, or when milling, cutting, bending, drilling, welding or other mechanical processing. The origin of the magnetic field can be in any environment. But it affects only ferromagnetic materials including iron, nickel and cobalt, or alloys of some elements.