JPS5658658A - Measuring method of grain size of steel material using pulse laser light - Google Patents

Measuring method of grain size of steel material using pulse laser light

Info

Publication number
JPS5658658A
JPS5658658A JP13444179A JP13444179A JPS5658658A JP S5658658 A JPS5658658 A JP S5658658A JP 13444179 A JP13444179 A JP 13444179A JP 13444179 A JP13444179 A JP 13444179A JP S5658658 A JPS5658658 A JP S5658658A
Authority
JP
Japan
Prior art keywords
steel material
grain size
pulse laser
echo train
laser light
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
JP13444179A
Other languages
Japanese (ja)
Inventor
Toru Inouchi
Shoichi Sekiguchi
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
Nippon 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP13444179A priority Critical patent/JPS5658658A/en
Publication of JPS5658658A publication Critical patent/JPS5658658A/en
Pending legal-status Critical Current

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  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE: To permit an on-line inspection of the grain size of the steel material having a high temperature and moving at a high speed without contact by using the attenuation constant obtained from the peaks of an ultrasonic echo train.
CONSTITUTION: The light L1 from a pulse laser 2 is applied to the surface 1a of the steel material 1 being measured, and the ultrasonic wave produced by the reaction force due to the evaporation on the surface layer propagates through the steel material 1 and reaches a surface 1b, producing a vibration displacement Z. Moreover, the ultrasonic pulse is reflected to the surface 1a and propagated to the surface 1b again to generate a pulse echo train. The vibration displacement is detected by means of a detector 3. The peaks of the echo train attenuate gradually, and the attenuation constant is to depend on the grain size of the steel material 1.
COPYRIGHT: (C)1981,JPO&Japio
JP13444179A 1979-10-18 1979-10-18 Measuring method of grain size of steel material using pulse laser light Pending JPS5658658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13444179A JPS5658658A (en) 1979-10-18 1979-10-18 Measuring method of grain size of steel material using pulse laser light

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13444179A JPS5658658A (en) 1979-10-18 1979-10-18 Measuring method of grain size of steel material using pulse laser light

Publications (1)

Publication Number Publication Date
JPS5658658A true JPS5658658A (en) 1981-05-21

Family

ID=15128421

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13444179A Pending JPS5658658A (en) 1979-10-18 1979-10-18 Measuring method of grain size of steel material using pulse laser light

Country Status (1)

Country Link
JP (1) JPS5658658A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS595948A (en) * 1982-07-02 1984-01-12 Agency Of Ind Science & Technol Non-destructive inspection with light irradiation sound source
US5630367A (en) * 1993-04-09 1997-05-20 The Social Welfare Foundation Hokkaido Rehabily Activated carbon and production thereof
WO2002103347A3 (en) * 2001-06-14 2003-04-24 Accentus Plc Grain-size measurement
JP2007101360A (en) * 2005-10-04 2007-04-19 Nippon Steel Corp Particle size measuring device of crystal, particle size measuring method of crystal, program and computer readable memory medium

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53126991A (en) * 1977-04-12 1978-11-06 Nippon Steel Corp Method of measuring crystal grain size of steels by ultrasonic waves
JPS5492387A (en) * 1977-12-29 1979-07-21 Sumitomo Metal Ind Noncontact supersonic inspecting method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS53126991A (en) * 1977-04-12 1978-11-06 Nippon Steel Corp Method of measuring crystal grain size of steels by ultrasonic waves
JPS5492387A (en) * 1977-12-29 1979-07-21 Sumitomo Metal Ind Noncontact supersonic inspecting method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS595948A (en) * 1982-07-02 1984-01-12 Agency Of Ind Science & Technol Non-destructive inspection with light irradiation sound source
US5630367A (en) * 1993-04-09 1997-05-20 The Social Welfare Foundation Hokkaido Rehabily Activated carbon and production thereof
WO2002103347A3 (en) * 2001-06-14 2003-04-24 Accentus Plc Grain-size measurement
JP2007101360A (en) * 2005-10-04 2007-04-19 Nippon Steel Corp Particle size measuring device of crystal, particle size measuring method of crystal, program and computer readable memory medium
JP4653624B2 (en) * 2005-10-04 2011-03-16 新日本製鐵株式会社 Crystal grain size measuring device, crystal grain size measuring method, program, and computer-readable storage medium

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