Automatic verification of induction hardening using eddy current and PMFT

This article is the summary of a lecture at the International Induction Heating Seminar in Nashville TN in 1995. Among others it depicts the advantages of the Preventive Multi-Frequency Technology compared to the single-frequency structure test. It also includes a table of kinds of defects which may occur during the induction hardening process and take a closer look at applications like testing induction-hardened water pump shafts and steering racks.

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