DEMAGENTIZING HARD METAL TOOLS AND PARTS
Hard metal tools undergo cleaning and coating. In both applications residual magnetism plays a decisive role. For one thing, an increase in magnetism causes adherence of minute particles; for another, residual magnetism influences the PVD coating process at the surface of the part (fluctuations in coating thickness, etc.).
Residual magnetism in hard metal machining tools is undesirable for end customers, because particles or shavings adhere to the tools and have a negative influence on the production process. Whether milling, drilling, reaming, shaping or forming: whatever process is involved, Maurer Magnetic offers you the optimal demagnetizing solution.
Application Note: Demagnetization of tungsten carbides
Carbide parts are magnetized both during production and in use and it is not always possible to identify a single source of the residual magnetism. The following application note discusses the demagnetization of tungsten carbides. For the demagnetization of carbides, commonly include cobalt as a binder, very high field strengths are required, which sometimes exceed 200 kA/m (25 mT / 250 Gauss). A reduction of residual magnetism can be achieved at lower field strengths.