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 provides 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 after the execution of a Deal Repair: to remove the high hardness.The Eddy Current Testing method comprises the steps of: detecting the presence of the high hardness is based on a differential Signal obtained by the detection of an Eddy Current induced in the metal material P, with the pair of Detection coils 11A11B; and identifying a position of the detected high hardness located in Absolute value based on a Signal obtained by detecting The Eddy Current induced in the metal material, with either a pair of Detection coils.