JPS5658660A - 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
JPS5658660A
JPS5658660A JP13444379A JP13444379A JPS5658660A JP S5658660 A JPS5658660 A JP S5658660A JP 13444379 A JP13444379 A JP 13444379A JP 13444379 A JP13444379 A JP 13444379A JP S5658660 A JPS5658660 A JP S5658660A
Authority
JP
Japan
Prior art keywords
steel material
grain size
pulse laser
detected
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
JP13444379A
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 JP13444379A priority Critical patent/JPS5658660A/en
Publication of JPS5658660A publication Critical patent/JPS5658660A/en
Pending legal-status Critical Current

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Landscapes

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

Abstract

PURPOSE: To permit an on-line inpection of the grain size of the steel material having a high temperature and moving at a high speed without contact by using the peak values of the detected ultrasonic pulses.
CONSTITUTION: With its diameter decreased, a high-power pulse laser beam having a short time-width is applied to the surface 1a of a steel material 1 to generate ultrasonic pulse wave in the steel material 1 in an acoustic point source manner. Then an mechanical displacement produced when the ultrasonic wave having propagated reaches a surface 1b is detected by means of a detector 3, and the peak values of the detected pulses are measured to obtain the grain size of the steel material 1.
COPYRIGHT: (C)1981,JPO&Japio
JP13444379A 1979-10-18 1979-10-18 Measuring method of grain size of steel material using pulse laser light Pending JPS5658660A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13444379A JPS5658660A (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
JP13444379A JPS5658660A (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
JPS5658660A true JPS5658660A (en) 1981-05-21

Family

ID=15128465

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13444379A Pending JPS5658660A (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) JPS5658660A (en)

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

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