JPS5722552A - Method for detecting flaw by using magnetic powder - Google Patents

Method for detecting flaw by using magnetic powder

Info

Publication number
JPS5722552A
JPS5722552A JP9834880A JP9834880A JPS5722552A JP S5722552 A JPS5722552 A JP S5722552A JP 9834880 A JP9834880 A JP 9834880A JP 9834880 A JP9834880 A JP 9834880A JP S5722552 A JPS5722552 A JP S5722552A
Authority
JP
Japan
Prior art keywords
checked
magnetic field
magnetizing coil
magnetic powder
flaws
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
JP9834880A
Other languages
Japanese (ja)
Inventor
Yoshio Noma
Seiji Nishina
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.)
Shimadzu Corp
Original Assignee
Shimadzu 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 Shimadzu Corp filed Critical Shimadzu Corp
Priority to JP9834880A priority Critical patent/JPS5722552A/en
Publication of JPS5722552A publication Critical patent/JPS5722552A/en
Pending legal-status Critical Current

Links

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
    • G01N27/83—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields
    • G01N27/84—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws by investigating stray magnetic fields by applying magnetic powder or magnetic ink

Landscapes

  • 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

PURPOSE:To enable the detection of flaws evenly on the entire surface and in all directions of an irregular body, by providing a magnetizing coil around the outer surface of the body to be checked and forming a synthesized circular rotating magnetic field by directly conducting electricity in said body to be checked. CONSTITUTION:The magnetizing coil 2 is wound around the body to be checked 1 having, e.g., a rectangular cross section, and electrode rollers 3-3'' are provided. Currents having the phase difference of 90 deg. are flowed to said magnetizing coil 2 and electrode rollers 3-3'' via electrodes 4-4. The synthesized magnetic field becomes a circular rotating magnetic field. Therefore, uniformalized magnetic field is formed on the entire surface and in all directions of the body to be checked 1, and even detection of the flaws by the magnetic powder can be performed at every side and corner.
JP9834880A 1980-07-17 1980-07-17 Method for detecting flaw by using magnetic powder Pending JPS5722552A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9834880A JPS5722552A (en) 1980-07-17 1980-07-17 Method for detecting flaw by using magnetic powder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9834880A JPS5722552A (en) 1980-07-17 1980-07-17 Method for detecting flaw by using magnetic powder

Publications (1)

Publication Number Publication Date
JPS5722552A true JPS5722552A (en) 1982-02-05

Family

ID=14217388

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9834880A Pending JPS5722552A (en) 1980-07-17 1980-07-17 Method for detecting flaw by using magnetic powder

Country Status (1)

Country Link
JP (1) JPS5722552A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157046A (en) * 1983-12-27 1985-08-17 ザ・バブコツク・アンド・ウイルコツクス・カンパニー Electromagnetic inspection device to pipe of ferromagnetic substance
JP2008249739A (en) * 2008-07-22 2008-10-16 Sumitomo Metal Ind Ltd Magnetizing equipment for detecting magnetic flaw in steel pipe

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157046A (en) * 1983-12-27 1985-08-17 ザ・バブコツク・アンド・ウイルコツクス・カンパニー Electromagnetic inspection device to pipe of ferromagnetic substance
JP2008249739A (en) * 2008-07-22 2008-10-16 Sumitomo Metal Ind Ltd Magnetizing equipment for detecting magnetic flaw in steel pipe

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