WO2008126554A1 - Eddy current inspection method, steel pipe inspected by the eddy current inspection method, and eddy current inspection device for carrying out the eddy current inspection method - Google Patents

Eddy current inspection method, steel pipe inspected by the eddy current inspection method, and eddy current inspection device for carrying out the eddy current inspection method Download PDF

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Publication number
WO2008126554A1
WO2008126554A1 PCT/JP2008/054335 JP2008054335W WO2008126554A1 WO 2008126554 A1 WO2008126554 A1 WO 2008126554A1 JP 2008054335 W JP2008054335 W JP 2008054335W WO 2008126554 A1 WO2008126554 A1 WO 2008126554A1
Authority
WO
WIPO (PCT)
Prior art keywords
eddy current
current inspection
inspection method
hardness portion
carrying
Prior art date
Application number
PCT/JP2008/054335
Other languages
French (fr)
Japanese (ja)
Inventor
Shigetoshi Hyodo
Satoshi Kureishi
Original Assignee
Sumitomo Metal Industries, Ltd.
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 Sumitomo Metal Industries, Ltd. filed Critical Sumitomo Metal Industries, Ltd.
Publication of WO2008126554A1 publication Critical patent/WO2008126554A1/en

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
    • G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
    • G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

Provided is an eddy current inspection method which can surely detect a high-hardness portion existing locally in a magnetic metal material and surely check whether the high-hardness portion has been removed after the treatment for removing the high-hardness portion. The eddy current inspection method detects presence/absence of a locally existing high-hardness portion according to a differential signal obtained by detecting an eddy current induced in a metal material P by using a pair of detection coils (11a, 11b) and identifies the position of the locally existing high-hardness portion which has been detected, according to an absolute value signal obtained by detecting the eddy current induced in the metal material by one of the detection coils.
PCT/JP2008/054335 2007-03-14 2008-03-11 Eddy current inspection method, steel pipe inspected by the eddy current inspection method, and eddy current inspection device for carrying out the eddy current inspection method WO2008126554A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2007064844A JP4998821B2 (en) 2007-03-14 2007-03-14 Eddy current inspection method and eddy current inspection apparatus for implementing the eddy current inspection method
JP2007-064844 2007-03-14

Publications (1)

Publication Number Publication Date
WO2008126554A1 true WO2008126554A1 (en) 2008-10-23

Family

ID=39843296

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/054335 WO2008126554A1 (en) 2007-03-14 2008-03-11 Eddy current inspection method, steel pipe inspected by the eddy current inspection method, and eddy current inspection device for carrying out the eddy current inspection method

Country Status (2)

Country Link
JP (1) JP4998821B2 (en)
WO (1) WO2008126554A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010050134A1 (en) * 2008-10-28 2010-05-06 トヨタ自動車株式会社 Frequency selection method for eddy current measurement and method of measuring depth of hardening
JP2015508897A (en) * 2012-02-23 2015-03-23 インスティトゥート ドクトル フェルスター ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディトゲゼルシャフト Penetration coil configuration, test apparatus having penetration coil configuration, and test method
WO2015072365A1 (en) * 2013-11-18 2015-05-21 Ntn株式会社 Eddy current flaw detection device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016057814A1 (en) * 2014-10-10 2016-04-14 Exxam Systems, LLC Eddy current pipeline inspection apparatus and method
US10746698B2 (en) 2017-01-31 2020-08-18 Exxam Systems, LLC Eddy current pipeline inspection using swept frequency
JP6948297B2 (en) * 2017-09-04 2021-10-13 Ｊｆｅスチール株式会社 Steel sheet manufacturing method, surface hardness measuring device for magnetic materials, and steel sheet manufacturing equipment line
KR102164105B1 (en) * 2018-11-30 2020-10-12 주식회사 포스코 Apparatus and method for sensing high hardness position of steel plate shrface
JP2021043160A (en) * 2019-09-13 2021-03-18 日本製鉄株式会社 Hardness change part detection device, hardness change part detection method and program
KR20230010709A (en) 2020-06-15 2023-01-19 제이에프이 스틸 가부시키가이샤 Mechanical property measurement device, mechanical property measurement method, material manufacturing facility, material management method, and material manufacturing method
CN115698700A (en) 2020-06-15 2023-02-03 杰富意钢铁株式会社 Device for measuring mechanical properties, method for measuring mechanical properties, apparatus for manufacturing substance, method for managing substance, and method for manufacturing substance
EP4166252A4 (en) 2020-06-15 2023-11-29 JFE Steel Corporation Mechanical property measuring device, mechanical property measuring method, substance manufacturing facility, substance management method, and substance manufacturing method
JPWO2023106047A1 (en) 2021-12-09 2023-06-15

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5026951B1 (en) * 1969-02-10 1975-09-04
JPS6039552A (en) * 1983-08-13 1985-03-01 Shimadzu Corp Eddy current flaw detector
JPS60185158A (en) * 1984-03-02 1985-09-20 Sumitomo Metal Ind Ltd Electromagnetic induction testing method and apparatus thereof
JPS62174651A (en) * 1986-01-28 1987-07-31 Suzuki Motor Co Ltd Method and device for deciding hardness of magnetic body
JPH11189844A (en) * 1997-12-25 1999-07-13 Kansai Electric Power Co Inc:The Resistance welded steel tube for steel tower, excellent in hot dip galvanizing crack resistance, and its production

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5026951B1 (en) * 1969-02-10 1975-09-04
JPS6039552A (en) * 1983-08-13 1985-03-01 Shimadzu Corp Eddy current flaw detector
JPS60185158A (en) * 1984-03-02 1985-09-20 Sumitomo Metal Ind Ltd Electromagnetic induction testing method and apparatus thereof
JPS62174651A (en) * 1986-01-28 1987-07-31 Suzuki Motor Co Ltd Method and device for deciding hardness of magnetic body
JPH11189844A (en) * 1997-12-25 1999-07-13 Kansai Electric Power Co Inc:The Resistance welded steel tube for steel tower, excellent in hot dip galvanizing crack resistance, and its production

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010050134A1 (en) * 2008-10-28 2010-05-06 トヨタ自動車株式会社 Frequency selection method for eddy current measurement and method of measuring depth of hardening
JP2010107214A (en) * 2008-10-28 2010-05-13 Toyota Motor Corp Frequency selecting method and quench depth measuring method in measuring eddy current
US8432161B2 (en) 2008-10-28 2013-04-30 Toyota Jidosha Kabushiki Kaisha Frequency selection method and hardening depth measurement method of eddy current measurement
JP2015508897A (en) * 2012-02-23 2015-03-23 インスティトゥート ドクトル フェルスター ゲゼルシャフト ミット ベシュレンクテル ハフツング ウント コンパニー コマンディトゲゼルシャフト Penetration coil configuration, test apparatus having penetration coil configuration, and test method
WO2015072365A1 (en) * 2013-11-18 2015-05-21 Ntn株式会社 Eddy current flaw detection device
JP2015099043A (en) * 2013-11-18 2015-05-28 Ntn株式会社 Eddy current test device

Also Published As

Publication number Publication date
JP2008224495A (en) 2008-09-25
JP4998821B2 (en) 2012-08-15

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