CARBURIZING SENSING METHOD

[Problem] To provide a carburizing sensing method with which it is possible to sense minute carburizing which cannot be easily sensed with existing carburizing sensing methods. [Solution] The present invention comprises: inserting a carburizing material (PO) which is known to give off carburization...

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Hauptverfasser: TAKIMOTO, YOSHIKAZU, HYODO, SHIGETOSHI
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creator TAKIMOTO, YOSHIKAZU
HYODO, SHIGETOSHI
description [Problem] To provide a carburizing sensing method with which it is possible to sense minute carburizing which cannot be easily sensed with existing carburizing sensing methods. [Solution] The present invention comprises: inserting a carburizing material (PO) which is known to give off carburization in an inner surface of a pipe into an excitation coil (11) and a detector coil (12), and establishing the value of a parameter (K) which is represented with the formula (1) below with the current value of the exciting current which passes through the excitation coil designated I(A), the length of the excitation coil designated L(mm), the number of turns of the excitation coil designated N, and the frequency of the excitation current which passes through the excitation coil designated F(kHz), such that it is possible to detect carburization which arises in the carburizing material based on an output signal from the detector coil; and thereafter, setting the conditions of the excitation coil such that the value of the parameter (K) may be obtained, and then sensing the presence of carburization on the inner surface of the pipe which is to be inspected. K = (I N/L) F-3/2 (1)
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[Solution] The present invention comprises: inserting a carburizing material (PO) which is known to give off carburization in an inner surface of a pipe into an excitation coil (11) and a detector coil (12), and establishing the value of a parameter (K) which is represented with the formula (1) below with the current value of the exciting current which passes through the excitation coil designated I(A), the length of the excitation coil designated L(mm), the number of turns of the excitation coil designated N, and the frequency of the excitation current which passes through the excitation coil designated F(kHz), such that it is possible to detect carburization which arises in the carburizing material based on an output signal from the detector coil; and thereafter, setting the conditions of the excitation coil such that the value of the parameter (K) may be obtained, and then sensing the presence of carburization on the inner surface of the pipe which is to be inspected. 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[Solution] The present invention comprises: inserting a carburizing material (PO) which is known to give off carburization in an inner surface of a pipe into an excitation coil (11) and a detector coil (12), and establishing the value of a parameter (K) which is represented with the formula (1) below with the current value of the exciting current which passes through the excitation coil designated I(A), the length of the excitation coil designated L(mm), the number of turns of the excitation coil designated N, and the frequency of the excitation current which passes through the excitation coil designated F(kHz), such that it is possible to detect carburization which arises in the carburizing material based on an output signal from the detector coil; and thereafter, setting the conditions of the excitation coil such that the value of the parameter (K) may be obtained, and then sensing the presence of carburization on the inner surface of the pipe which is to be inspected. 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[Solution] The present invention comprises: inserting a carburizing material (PO) which is known to give off carburization in an inner surface of a pipe into an excitation coil (11) and a detector coil (12), and establishing the value of a parameter (K) which is represented with the formula (1) below with the current value of the exciting current which passes through the excitation coil designated I(A), the length of the excitation coil designated L(mm), the number of turns of the excitation coil designated N, and the frequency of the excitation current which passes through the excitation coil designated F(kHz), such that it is possible to detect carburization which arises in the carburizing material based on an output signal from the detector coil; and thereafter, setting the conditions of the excitation coil such that the value of the parameter (K) may be obtained, and then sensing the presence of carburization on the inner surface of the pipe which is to be inspected. K = (I N/L) F-3/2 (1)</abstract><oa>free_for_read</oa></addata></record>
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subjects CHEMICAL SURFACE TREATMENT
CHEMISTRY
COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
COATING MATERIAL WITH METALLIC MATERIAL
COATING METALLIC MATERIAL
DIFFUSION TREATMENT OF METALLIC MATERIAL
INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
MEASURING ANGLES
MEASURING AREAS
MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS
METALLURGY
PHYSICS
SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION
TESTING
title CARBURIZING SENSING METHOD
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