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1. MX2018000961 - METODO DE INSPECCION DE CARACTERISTICAS DE SUPERFICIE Y APARATO DE INSPECCION DE CARACTERISTICAS DE SUPERFICIE PARA PRODUCTO DE ACERO.

Office
Mexico
Application Number 2018000961
Application Date 22.01.2018
Publication Number 2018000961
Publication Date 07.06.2018
Publication Kind A
IPC
G01N 27/72
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electro-chemical, or magnetic means
72by investigating magnetic variables
CPC
C21D 7/06
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
7Modifying the physical properties of iron or steel by deformation
02by cold working
04of the surface
06by shot-peening or the like
C21D 11/00
CCHEMISTRY; METALLURGY
21METALLURGY OF IRON
DMODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
11Process control or regulation for heat treatments
G01N 27/9046
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
72by investigating magnetic variables
82for investigating the presence of flaws
90using eddy currents
9046by analysing electrical signals
G01N 27/9006
GPHYSICS
01MEASURING; TESTING
NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
27Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
72by investigating magnetic variables
82for investigating the presence of flaws
90using eddy currents
9006Details, e.g. in the structure or functioning of sensors
Applicants SINTOKOGIO, LTD.
Inventors Yoshiyasu MAKINO
Priority Data 2015-156263 06.08.2015 JP
Title
(ES) METODO DE INSPECCION DE CARACTERISTICAS DE SUPERFICIE Y APARATO DE INSPECCION DE CARACTERISTICAS DE SUPERFICIE PARA PRODUCTO DE ACERO.
Abstract
(EN) Provided is a surface property inspection method for non-destructively determining whether heat treatment has been appropriately carried out on a steel product that has been subjected to surface treatment. A surface property inspection device is used that is provided with: an AC bridge circuit; an AC power supply for supplying AC power to the AC bridge circuit; and an evaluation device for, on the basis of the output signal from the AC bridge circuit, evaluating the surface properties of a specimen under inspection that is a steel product that has had surface treatment including heat treatment applied thereto. AC magnetism is excited in the coils of a reference detector and inspection detector included in the bridge circuit so as to induce eddy currents in a reference specimen and the specimen under inspection, and an electromagnetic characteristic of the specimen under inspection in a state where the reference detector detects a reference state is output as a first output signal. At that time, the evaluation device compares the first output signal with a first threshold and evaluates the degree of heat treatment of the specimen under inspection.