JPS578444A - Method of on-line decision of material characteristics of steel plate and its anisotropy - Google Patents

Method of on-line decision of material characteristics of steel plate and its anisotropy

Info

Publication number
JPS578444A
JPS578444A JP8275780A JP8275780A JPS578444A JP S578444 A JPS578444 A JP S578444A JP 8275780 A JP8275780 A JP 8275780A JP 8275780 A JP8275780 A JP 8275780A JP S578444 A JPS578444 A JP S578444A
Authority
JP
Japan
Prior art keywords
steel plate
propagation
rates
material characteristics
anisotropy
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
JP8275780A
Other languages
Japanese (ja)
Inventor
Takeshi Kitagawa
Hideo Maruyama
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
Original Assignee
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 Kawasaki Steel Corp filed Critical Kawasaki Steel Corp
Priority to JP8275780A priority Critical patent/JPS578444A/en
Publication of JPS578444A publication Critical patent/JPS578444A/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
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids
    • G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2291/00—Indexing codes associated with group G01N29/00
    • G01N2291/02—Indexing codes associated with the analysed material
    • G01N2291/028—Material parameters
    • G01N2291/0289—Internal structure, e.g. defects, grain size, texture

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material 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 Ultrasonic Waves (AREA)

Abstract

PURPOSE:To perform on-line decision of the material characteristics of a steel plate and its anisotropy during traveling by measuring the rate of propagation of elastic wave in the steel plate. CONSTITUTION:A Y-cut crystal oscillator is used as a transverse wave transmitter. A radio receiving terminal 1 and a transmitting terminal 2 are made in one piece and are so set that both are located always at a constant distance. The center C of a bar connecting both is aligned roughly to the center of the plate width on the traveling line of a steel plate P, and the bar is made rotatable around the central axis C. Water nozzles 3, 4 are provided in order to acoustically couple a transmitter and a surface to be inspected as well as a receiver and the surface to be inspected. The terminals 1, 2 are turned around the normal axis of the steel plate to measure the rates of propagation in the plural directions within the surface. Usually, the values in the three directions; a rolling direction, a 45 deg. direction and a 90 deg. direction, are measured at constant periods or intermittently. The average rates of propagation of the steel plate or the average modulus of rigidity of the steel plate is calculated from the measured values of the rates of propagation in the respective directions; at the same time, the in-surface anisotropy of the material characteristics of the steel plate is evaluated from the modulus G of rigidity in the respective directions.
JP8275780A 1980-06-20 1980-06-20 Method of on-line decision of material characteristics of steel plate and its anisotropy Pending JPS578444A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8275780A JPS578444A (en) 1980-06-20 1980-06-20 Method of on-line decision of material characteristics of steel plate and its anisotropy

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8275780A JPS578444A (en) 1980-06-20 1980-06-20 Method of on-line decision of material characteristics of steel plate and its anisotropy

Publications (1)

Publication Number Publication Date
JPS578444A true JPS578444A (en) 1982-01-16

Family

ID=13783308

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8275780A Pending JPS578444A (en) 1980-06-20 1980-06-20 Method of on-line decision of material characteristics of steel plate and its anisotropy

Country Status (1)

Country Link
JP (1) JPS578444A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5023888A (en) * 1973-07-04 1975-03-14
JPS53126992A (en) * 1977-04-12 1978-11-06 Nippon Steel Corp Discriminating method of casting structure by ultrasonic waves

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5023888A (en) * 1973-07-04 1975-03-14
JPS53126992A (en) * 1977-04-12 1978-11-06 Nippon Steel Corp Discriminating method of casting structure by ultrasonic waves

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