DK0878247T3 - Tester for non-destructive testing of hot rod steel - Google Patents

Tester for non-destructive testing of hot rod steel

Info

Publication number
DK0878247T3
DK0878247T3 DK98108607T DK98108607T DK0878247T3 DK 0878247 T3 DK0878247 T3 DK 0878247T3 DK 98108607 T DK98108607 T DK 98108607T DK 98108607 T DK98108607 T DK 98108607T DK 0878247 T3 DK0878247 T3 DK 0878247T3
Authority
DK
Denmark
Prior art keywords
destructive testing
coil
tester
rod
rod steel
Prior art date
Application number
DK98108607T
Other languages
Danish (da)
Inventor
Horst Scharlemann
Original Assignee
Georgsmarienhuette Gmbh
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 Georgsmarienhuette Gmbh filed Critical Georgsmarienhuette Gmbh
Application granted granted Critical
Publication of DK0878247T3 publication Critical patent/DK0878247T3/en

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
    • G01N27/90—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
    • G01N27/9013—Arrangements for scanning
    • G01N27/9026—Arrangements for scanning by moving the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product

Landscapes

  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Biochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Electrochemistry (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Investigating Or Analyzing Materials Using Thermal Means (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Metal Rolling (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The apparatus for non-destructive testing of hot rolled material, in particular, steel rod above the Curie point temperature includes a coil surrounding the rod undergoing rolling. Faults such as cracks, holes etc. lead to propagation disturbances of eddy currents excited in the rod. These disturbances produce in the coil an error signal which is recorded and evaluated. The coil is located directly at the exit of a roll stand and between two roll stands of a block formed by several roll stands arranged in series.
DK98108607T 1997-05-13 1998-05-12 Tester for non-destructive testing of hot rod steel DK0878247T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19719980A DE19719980C1 (en) 1997-05-13 1997-05-13 Device for the non-destructive testing of hot rolled material, in particular steel bars

Publications (1)

Publication Number Publication Date
DK0878247T3 true DK0878247T3 (en) 2003-06-10

Family

ID=7829309

Family Applications (1)

Application Number Title Priority Date Filing Date
DK98108607T DK0878247T3 (en) 1997-05-13 1998-05-12 Tester for non-destructive testing of hot rod steel

Country Status (6)

Country Link
EP (1) EP0878247B1 (en)
AT (1) ATE234167T1 (en)
DE (2) DE19719980C1 (en)
DK (1) DK0878247T3 (en)
ES (1) ES2192286T3 (en)
PT (1) PT878247E (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0995507B1 (en) * 1998-09-03 2004-07-07 Georgsmarienhütte GmbH Device for non-destructive testing in particular of hot rod-shaped rolling stock

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4461995A (en) * 1981-10-29 1984-07-24 Republic Steel Corporation Cooling method and apparatus for eddy current flaw detection
JPS6193904A (en) * 1984-10-15 1986-05-12 Sumitomo Metal Ind Ltd Inspection of product in finish rolling mill for seamless steel pipe
US5175498A (en) * 1990-03-05 1992-12-29 General Electric Company Method and apparatus for making spatially correlated eddy current measurements
FR2665263A1 (en) * 1990-07-25 1992-01-31 Vallourec Ind METHOD AND DEVICE FOR CONTROLLING DEFECTS OF METAL TUBES DURING HOT ROLLING BY EDGE CURRENTS.
FR2720303B3 (en) * 1994-05-31 1996-05-03 Unimetall Sa Device for detecting surface defects on long metallurgical products and rolling installation equipped with such a device.

Also Published As

Publication number Publication date
PT878247E (en) 2003-07-31
EP0878247A3 (en) 1999-07-14
DE59807429D1 (en) 2003-04-17
ES2192286T3 (en) 2003-10-01
ATE234167T1 (en) 2003-03-15
DE19719980C1 (en) 1998-11-12
EP0878247B1 (en) 2003-03-12
EP0878247A2 (en) 1998-11-18

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