JPS6421348A - Leakage magnetism flaw detection - Google Patents

Leakage magnetism flaw detection

Info

Publication number
JPS6421348A
JPS6421348A JP17732687A JP17732687A JPS6421348A JP S6421348 A JPS6421348 A JP S6421348A JP 17732687 A JP17732687 A JP 17732687A JP 17732687 A JP17732687 A JP 17732687A JP S6421348 A JPS6421348 A JP S6421348A
Authority
JP
Japan
Prior art keywords
yoke
flaw detection
coil
search coil
detection probe
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP17732687A
Other languages
Japanese (ja)
Inventor
Shigenori Kamimura
Akira Saeki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JFE Steel Corp
Eddio Corp
Original Assignee
Eddio Corp
Kawasaki Steel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Eddio Corp, Kawasaki Steel Corp filed Critical Eddio Corp
Priority to JP17732687A priority Critical patent/JPS6421348A/en
Publication of JPS6421348A publication Critical patent/JPS6421348A/en
Pending legal-status Critical Current

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  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

PURPOSE:To enable highly sensitive detection of a fine defect, by magnetizing an object to be inspected using a high-pass high frequency AC to detect a flaw by means of a flaw detection probe comprising a small-dia. search coil. CONSTITUTION:A yoke (magnetizer) 21 is made up to a yoke 22 and a magnetizing coil 23 is mounted with a mounting bolt 26 in a mounting recess 25 formed on a yoke support plate 24. A flaw detection probe 29 for detecting a leakage magnetic flux is provided on the yoke 21 as attachment. The frequency of a magnetization AC to energize the magnetizing coil 23 is set at a high pass of 6-12kHz while the diameter of a search coil 29A of the flaw detection probe 29 ranges 1-6mm. This can reduce a surface product of the search coil 29A to suppress a higher temperature of the search coil 29A as affected by heat generation of the yoke 21 thereby enabling a less permeation depth of a magnetic flux with the magnetization of the object to be inspected by a high- pass high frequency AC.
JP17732687A 1987-07-17 1987-07-17 Leakage magnetism flaw detection Pending JPS6421348A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17732687A JPS6421348A (en) 1987-07-17 1987-07-17 Leakage magnetism flaw detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17732687A JPS6421348A (en) 1987-07-17 1987-07-17 Leakage magnetism flaw detection

Publications (1)

Publication Number Publication Date
JPS6421348A true JPS6421348A (en) 1989-01-24

Family

ID=16029018

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17732687A Pending JPS6421348A (en) 1987-07-17 1987-07-17 Leakage magnetism flaw detection

Country Status (1)

Country Link
JP (1) JPS6421348A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02221857A (en) * 1989-02-22 1990-09-04 Hara Denshi Sokki Kk Rotary head mechanism of rotary leakage magnetic flux flaw detecting machine
JPH11230945A (en) * 1998-02-09 1999-08-27 Hitachi Building Systems Co Ltd Magnetic flaw detector for wire rope
US6479992B2 (en) * 2000-07-12 2002-11-12 Nkk Corporation Leakage flux flaw detecting method and method for manufacturing hot rolled steel sheet using the same
KR20240106420A (en) * 2022-12-29 2024-07-08 부산대학교 산학협력단 Device and method for determining internal and external defects of pipe using non destructive testing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS506682B1 (en) * 1966-07-13 1975-03-17
JPS6271854A (en) * 1985-09-25 1987-04-02 Shimadzu Corp Leakage magnetic flux flaw detection device

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS506682B1 (en) * 1966-07-13 1975-03-17
JPS6271854A (en) * 1985-09-25 1987-04-02 Shimadzu Corp Leakage magnetic flux flaw detection device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02221857A (en) * 1989-02-22 1990-09-04 Hara Denshi Sokki Kk Rotary head mechanism of rotary leakage magnetic flux flaw detecting machine
JPH11230945A (en) * 1998-02-09 1999-08-27 Hitachi Building Systems Co Ltd Magnetic flaw detector for wire rope
US6479992B2 (en) * 2000-07-12 2002-11-12 Nkk Corporation Leakage flux flaw detecting method and method for manufacturing hot rolled steel sheet using the same
KR20240106420A (en) * 2022-12-29 2024-07-08 부산대학교 산학협력단 Device and method for determining internal and external defects of pipe using non destructive testing

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