JPS5710448A - Evaluation for strength of refractories - Google Patents

Evaluation for strength of refractories

Info

Publication number
JPS5710448A
JPS5710448A JP8488280A JP8488280A JPS5710448A JP S5710448 A JPS5710448 A JP S5710448A JP 8488280 A JP8488280 A JP 8488280A JP 8488280 A JP8488280 A JP 8488280A JP S5710448 A JPS5710448 A JP S5710448A
Authority
JP
Japan
Prior art keywords
refractories
velocity
sound
automatically
compression strength
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
JP8488280A
Other languages
Japanese (ja)
Inventor
Kazuo Fujisawa
Hisao Yamaguchi
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.)
Nippon Steel Corp
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
Priority to JP8488280A priority Critical patent/JPS5710448A/en
Publication of JPS5710448A publication Critical patent/JPS5710448A/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
    • G01N2291/023—Solids
    • G01N2291/0232—Glass, ceramics, concrete or stone

Abstract

PURPOSE:To evaluate the compression strength of a refractory brick automatically and nondestructively by measuring the velocity of sound in the refractory brick with an ultrasonic probe. CONSTITUTION:The velocity of sound V is approximately proportional with the root of Young's modulus E. It is known that relationship between the compression strength sigma(kg/mm.<2>) and the Young's modulus E can be shown by a curve shown in the attached graph. Such a relationship which has previously been determined is stored or set in, for example, the memory of a computer system. An ultrasonic probe is automatically and closely applied to refractories which are being transferred automatically and an ultrasonic wave of 50kHz-400kHz is emitted to measure the velocity of sound in the refractories. The measured results are compared with the stored data to find the respective corresponding compression strengths of the refractories thus evaluating the compression strength of the refractory.
JP8488280A 1980-06-23 1980-06-23 Evaluation for strength of refractories Pending JPS5710448A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8488280A JPS5710448A (en) 1980-06-23 1980-06-23 Evaluation for strength of refractories

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8488280A JPS5710448A (en) 1980-06-23 1980-06-23 Evaluation for strength of refractories

Publications (1)

Publication Number Publication Date
JPS5710448A true JPS5710448A (en) 1982-01-20

Family

ID=13843132

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8488280A Pending JPS5710448A (en) 1980-06-23 1980-06-23 Evaluation for strength of refractories

Country Status (1)

Country Link
JP (1) JPS5710448A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661749A1 (en) * 1990-05-02 1991-11-08 Centre Tech Ind Papier METHOD AND DEVICE FOR DETERMINING THE COEFFICIENT OF ELASTICITY OF A NON-RIGID THROUGHPUT MATERIAL.

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661749A1 (en) * 1990-05-02 1991-11-08 Centre Tech Ind Papier METHOD AND DEVICE FOR DETERMINING THE COEFFICIENT OF ELASTICITY OF A NON-RIGID THROUGHPUT MATERIAL.

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