MT testing and demagnetization using the contactless method
Using the non-contact method (see Figure 1) the test magnetic fields are generated in two coils that cross each other at an angle of at least 30° and then passed into the component. The leakages occurring at the cracks make for a clearly defined accumulation of magnetic particles and result in precise and clear crack images. It is possible to test multiple parts on an MT testing table (see Figure 2) simultaneously for longitudinal and transverse defects and demagnetize these by means of a contactless method.
The non-contact method is particularly suitable for magnetizing compact components, including those of varying geometry, and is used for both MT testing as well as demagnetization.