Hochheim, H.H.HochheimKern, R.R.KernTheiner, W.W.Theiner2022-03-082022-03-081992https://publica.fraunhofer.de/handle/publica/319826Pins of planetary wheels are inductive hardended in the middle part whereas two millimeters of each end must remain in a non hardened soft microstructure state. Because 180 pins/min are produced only automatic testing system can be used to assure a 100% production control. The Barkhausen noise amplitude which is snesitive to annealed and hardened microstructure of the steel grade 100 Cr 6 is used. The probe system consists of four air coils and a Hall-probe. By evaluating the Barkhausen noise amplitudes a nondestructive in time hardness measurement can be performed.de100 Cr 6automatic testingautomatische PrüfungBarkhausen noiseBarkhausen-Rauschenhardness testHärtemessungpins of planet wheelPlanetenradbolzenprocess controlProzeßkontrollezerstörungsfreie Prüfung620658670conference paper