GB1385198A - Method and apparatus for testing ferromagnetic material - Google Patents

Method and apparatus for testing ferromagnetic material

Info

Publication number
GB1385198A
GB1385198A GB3355271A GB3355271A GB1385198A GB 1385198 A GB1385198 A GB 1385198A GB 3355271 A GB3355271 A GB 3355271A GB 3355271 A GB3355271 A GB 3355271A GB 1385198 A GB1385198 A GB 1385198A
Authority
GB
United Kingdom
Prior art keywords
strip
flux
produce
phase
passing
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.)
Expired
Application number
GB3355271A
Inventor
Norman Davis
Paul Alfred Norris
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.)
British Iron and Steel Research Association BISRA
Original Assignee
British Iron and Steel Research Association BISRA
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 British Iron and Steel Research Association BISRA filed Critical British Iron and Steel Research Association BISRA
Priority to GB3355271A priority Critical patent/GB1385198A/en
Publication of GB1385198A publication Critical patent/GB1385198A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/36—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/12—Measuring magnetic properties of articles or specimens of solids or fluids
    • G01R33/14—Measuring or plotting hysteresis curves

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Abstract

1385198 Testing ferromagnetic material BRITISH IRON & STEEL RESEARCH ASSOCIATION 14 July 1972 [16 July 1971] 33552/71 Heading G1N The metallurgical phase, and/or temperature of a ferromagnetic material is detected by passing an alternating magnetic flux through the material and measuring the flux as modified by the material indicative of the magnetic properties of the material. The testing apparatus 8 is disposed below a steel strip 5 from a hot strip mill and includes an H-shaped magnetic core 10 mounted in a chamber 12 through which cooling water flows. A field winding 18 energized from A.C. source 30 produces an alternating flux passing through strip 5 via feet 38. The flux is modified by the magnetic properties of the metal strip 5 and causes a voltage VI to be generated across coils 22, 24 wound so that equal fluxes passing through the parts of the upright 26 from cross bar 20 produce a zero voltage across terminals 29. V 1 is integrated in box 40 to produce a signal representative of the magnetic induction B and a signal V 2 represented of the field H produced by coil 18 is developed across resistor 34. B, H, Hc, Br, Bm and Á are obtained from the computer 40 and the hysteresis loops calculated, they may be displayed on an oscilloscope. Various graphs of Bm, Br, dBm/dt dBr/dt versus temperature, H, B versus time and phase diagrams for various cooling rates are described Figs. 4-8 (not shown) from which phase transformation and temperature of the strip 5 can be deduced and signals obtained to control the cooling of the strip to produce a particular phase of the material of the metal strip.
GB3355271A 1971-07-16 1971-07-16 Method and apparatus for testing ferromagnetic material Expired GB1385198A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3355271A GB1385198A (en) 1971-07-16 1971-07-16 Method and apparatus for testing ferromagnetic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3355271A GB1385198A (en) 1971-07-16 1971-07-16 Method and apparatus for testing ferromagnetic material

Publications (1)

Publication Number Publication Date
GB1385198A true GB1385198A (en) 1975-02-26

Family

ID=10354428

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3355271A Expired GB1385198A (en) 1971-07-16 1971-07-16 Method and apparatus for testing ferromagnetic material

Country Status (1)

Country Link
GB (1) GB1385198A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105971A (en) * 1975-09-11 1978-08-08 Harri Nevalainen Permeability responsive oscillator for detecting phase transformations at various cooling rates
GB2184553A (en) * 1985-12-20 1987-06-24 Centro Speriment Metallurg Device for determination of phase transformations in metals and alloys
EP0257184A1 (en) * 1986-06-27 1988-03-02 Hewlett-Packard Company Non-destructive m-h hysteresis testers for magnetic computer discs
US4757259A (en) * 1985-11-06 1988-07-12 Cegedur Societe De Transformation De L'aluminium Pechiney Method for measuring the thickness and temperature of a moving metal sheet by means of eddy currents
GB2230341A (en) * 1989-01-28 1990-10-17 Cambridge Engineering Design L Apparatus for measuring magnetic flux density
GB2481482A (en) * 2011-04-27 2011-12-28 Univ Manchester Electromagnetic sensor for detecting microstructure of metal target
CN106950244A (en) * 2017-02-27 2017-07-14 西安交通大学 A kind of method that ferroelectricity relaxation phase transformation in ferroelectric is detected based on electron spin resonance

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4105971A (en) * 1975-09-11 1978-08-08 Harri Nevalainen Permeability responsive oscillator for detecting phase transformations at various cooling rates
US4757259A (en) * 1985-11-06 1988-07-12 Cegedur Societe De Transformation De L'aluminium Pechiney Method for measuring the thickness and temperature of a moving metal sheet by means of eddy currents
GB2184553A (en) * 1985-12-20 1987-06-24 Centro Speriment Metallurg Device for determination of phase transformations in metals and alloys
EP0257184A1 (en) * 1986-06-27 1988-03-02 Hewlett-Packard Company Non-destructive m-h hysteresis testers for magnetic computer discs
GB2230341A (en) * 1989-01-28 1990-10-17 Cambridge Engineering Design L Apparatus for measuring magnetic flux density
GB2230341B (en) * 1989-01-28 1994-01-05 Cambridge Engineering Design L Apparatus for and method of measuring magnetic flux density
GB2481482A (en) * 2011-04-27 2011-12-28 Univ Manchester Electromagnetic sensor for detecting microstructure of metal target
GB2481482B (en) * 2011-04-27 2012-06-20 Univ Manchester Improvements in sensors
US9404992B2 (en) 2011-04-27 2016-08-02 The University Of Manchester Sensors
US10144987B2 (en) 2011-04-27 2018-12-04 The University Of Manchester Sensors
CN106950244A (en) * 2017-02-27 2017-07-14 西安交通大学 A kind of method that ferroelectricity relaxation phase transformation in ferroelectric is detected based on electron spin resonance
CN106950244B (en) * 2017-02-27 2019-03-01 西安交通大学 A method of based on ferroelectricity-relaxation phase transformation in electron spin resonance detection ferroelectric

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees