Test Method of Eddy Current Tube or Steel Cano, piloted by test method of Eddy Current and Eddy Current Testing apparatus for carrying out the method of Eddy Current testing

摘要

It is an object of the present Act provide a method of Eddy Current Testing can detect safely in a localized part of high hardness which is produced in a Metallic material which has Magnetism and can verify safely if the high hardness has been removed L Then the execution of a Repair Treatment to remove the part of high hardness.In The Eddy Current Testing method according to this Act, a frequency of the Alternating Current ac for energizing the Coil 1 differential is established so that a phase difference between a Signal variation of the Magnetism of metallic material and a Signal e p Levada detected by the differential Coil is equal to or greater than 135,And part of that occurs in localized high hardness metal material is detected based on an amplitude and a phase of a signal from the Detection Coil differential.