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1. IN201847007674 - SURFACE PROPERTY INSPECTION METHOD AND SURFACE PROPERTY INSPECTION DEVICE FOR STEEL PRODUCT

Office
India
Application Number 201847007674
Application Date 01.03.2018
Publication Number 201847007674
Publication Date 16.03.2018
Publication Kind A
IPC
G01N 29/00
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
29Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
Applicants SINTOKOGIO, LTD.
Inventors MAKINO, Yoshiyasu
Priority Data 2015-156263 06.08.2015 JP
Title
(EN) SURFACE PROPERTY INSPECTION METHOD AND SURFACE PROPERTY INSPECTION DEVICE FOR STEEL PRODUCT
Abstract
(EN) To provide a surface characteristics inspection method of inspecting a heat treatment on a steel product subjected to a surface treatment in a nondestructive manner. A surface characteristics inspection apparatus is used which includes an alternating-current bridge circuit, an alternating-current power supply that supplies an alternating-current power to the alternating-current bridge circuit, and an evaluation device that evaluates the surface characteristics of a subject, which is a steel product subjected to a heat treatment, based on an output signal of the alternating-current bridge circuit. Coils of a reference detector and an inspection detector in the bridge circuit are energized to produce an alternating-current magnetism to induce an eddy current in a reference subject and the subject, respectively, and the electromagnetic characteristics of the subject obtained in the state where the reference detector detects a reference state is output as a first output signal.