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 lightInfo
- 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
Links
Landscapes
- 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
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)
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)
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 |
-
1979
- 1979-10-18 JP JP13444179A patent/JPS5658658A/en active Pending
Patent Citations (2)
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)
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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