Quenching depth measuring probe and quenching depth measuring method using the quenching depth measuring probe

摘要

PROBLEM TO BE SOLVED: To provide a hardened depth-measuring probe capable of safely measuring depth of a hardened layer at high accuracy, and to provide a hardened depth-measuring method therewith.SOLUTION: For achieving a purpose of the invention, there is provided a hardened depth-measuring probe to be disposed in a cylindrical workpiece for measuring a hardened depth of an inner wall face of the cylindrical workpiece. The probe comprises: a core having a first flat plate part disposed at one end of a columnar core part and a second flat plate part disposed at the another end, the first and the second flat plate parts being disposed parallel to each other; and a detection coil to detect an induction magnetic field, and an exciting coil to magnetize the cylindrical workpiece, both the detection coil and the exiting coil being wound around the columnar core part of the core. The first and the second flat plate parts are configured so as to be parted into two or more pieces and to dispose an insulation layer between respective parting planes of the respective pieces.