JPS57144457A - Ultrasonic flaw detection for round steel bar - Google Patents

Ultrasonic flaw detection for round steel bar

Info

Publication number
JPS57144457A
JPS57144457A JP56030651A JP3065181A JPS57144457A JP S57144457 A JPS57144457 A JP S57144457A JP 56030651 A JP56030651 A JP 56030651A JP 3065181 A JP3065181 A JP 3065181A JP S57144457 A JPS57144457 A JP S57144457A
Authority
JP
Japan
Prior art keywords
bar
ultrasonic waves
round steel
flaw detection
steel bar
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.)
Granted
Application number
JP56030651A
Other languages
Japanese (ja)
Other versions
JPS6411144B2 (en
Inventor
Masayoshi Iwasaki
Akio Suzuki
Hitoshi Uchiumi
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.)
Kobe Steel Ltd
Original Assignee
Kobe Steel 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 Kobe Steel Ltd filed Critical Kobe Steel Ltd
Priority to JP56030651A priority Critical patent/JPS57144457A/en
Publication of JPS57144457A publication Critical patent/JPS57144457A/en
Publication of JPS6411144B2 publication Critical patent/JPS6411144B2/ja
Granted 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
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
    • G01N29/27—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the material relative to a stationary sensor
    • 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
    • G01N29/22—Details, e.g. general constructional or apparatus details
    • G01N29/32—Arrangements for suppressing undesired influences, e.g. temperature or pressure variations, compensating for signal noise
    • 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
    • G01N2291/04—Wave modes and trajectories
    • G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
    • 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
    • G01N2291/26—Scanned objects
    • G01N2291/262—Linear objects
    • G01N2291/2626—Wires, bars, rods
    • 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
    • G01N2291/26—Scanned objects
    • G01N2291/263—Surfaces
    • G01N2291/2634—Surfaces cylindrical from outside

Landscapes

  • Physics & Mathematics (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 flaw detection right under the surface of a material with good sensitivity by making ultrasonic waves incident to a round steel bar at a 45+ or -8 deg. angle of refraction thereto, and detecting the reflection signal from the area near the 1st reflection position where ultrasonic waves converge. CONSTITUTION:While a round steel bar 2 which is held sandwiched from above and below at the front and rear of a water tank 1 is revoleved around its axial center by means of skew rolls 3 and pinch rolls 4, the bar 2 is conveyed at a constant speed in a longitudinal direction, and ultrasonic waves are transmitted from a probe 9, whereby the flaw detection is accomplished. In this case, the ultrasonic waves are made incident to the bar 2 from the outside surface thereof in such a way that the angle alpha of refraction attains 45+ or -8 deg., and these are converged at the 1st reflection position 1B where the ultrasonic waves entering the inside of the bar 2 reflect on the material surface. A flaw detector 12 gates the range G before and behind the point 1B, detects the reflection signal generated from the range G and detects the non-metallic inclusions existing within the range of about 10% below the surface in the bar 2. Thereby, defects are detected with high sensitivity and the influence of surface roughness is eliminated.
JP56030651A 1981-03-03 1981-03-03 Ultrasonic flaw detection for round steel bar Granted JPS57144457A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56030651A JPS57144457A (en) 1981-03-03 1981-03-03 Ultrasonic flaw detection for round steel bar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56030651A JPS57144457A (en) 1981-03-03 1981-03-03 Ultrasonic flaw detection for round steel bar

Publications (2)

Publication Number Publication Date
JPS57144457A true JPS57144457A (en) 1982-09-07
JPS6411144B2 JPS6411144B2 (en) 1989-02-23

Family

ID=12309695

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56030651A Granted JPS57144457A (en) 1981-03-03 1981-03-03 Ultrasonic flaw detection for round steel bar

Country Status (1)

Country Link
JP (1) JPS57144457A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6417462U (en) * 1987-07-20 1989-01-27
KR100521078B1 (en) * 2002-03-21 2005-10-12 팬아시아 페이퍼 코리아 주식회사 Roll Ultrasonic Test Method and its Apparatus
JP2009150679A (en) * 2007-12-19 2009-07-09 Sanyo Special Steel Co Ltd Surface flaw evaluation device of round bar steel by submerged ultrasonic flaw detection using electron scanning type array prob,e and surface flaw evaluation method of round bar steel
JP2009168229A (en) * 2008-01-21 2009-07-30 Nsk Ltd Manufacturing method of raceway member for rolling device
CN110988127A (en) * 2019-12-16 2020-04-10 宝钢特钢韶关有限公司 Signal identification method for detecting defects on surface and near surface of round bar by rotary ultrasonic

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SOCIETY OF AUTOMOTIVE ENGINEERS INC=1980 *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6417462U (en) * 1987-07-20 1989-01-27
KR100521078B1 (en) * 2002-03-21 2005-10-12 팬아시아 페이퍼 코리아 주식회사 Roll Ultrasonic Test Method and its Apparatus
JP2009150679A (en) * 2007-12-19 2009-07-09 Sanyo Special Steel Co Ltd Surface flaw evaluation device of round bar steel by submerged ultrasonic flaw detection using electron scanning type array prob,e and surface flaw evaluation method of round bar steel
JP2009168229A (en) * 2008-01-21 2009-07-30 Nsk Ltd Manufacturing method of raceway member for rolling device
CN110988127A (en) * 2019-12-16 2020-04-10 宝钢特钢韶关有限公司 Signal identification method for detecting defects on surface and near surface of round bar by rotary ultrasonic

Also Published As

Publication number Publication date
JPS6411144B2 (en) 1989-02-23

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