[go: up one dir, main page]

FR2426903A1 - Procede de detection des defauts superficiels et sous-jacents dans les produits lamines - Google Patents

Procede de detection des defauts superficiels et sous-jacents dans les produits lamines

Info

Publication number
FR2426903A1
FR2426903A1 FR7815588A FR7815588A FR2426903A1 FR 2426903 A1 FR2426903 A1 FR 2426903A1 FR 7815588 A FR7815588 A FR 7815588A FR 7815588 A FR7815588 A FR 7815588A FR 2426903 A1 FR2426903 A1 FR 2426903A1
Authority
FR
France
Prior art keywords
prods
defects
soln
substance
coated
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
FR7815588A
Other languages
English (en)
Other versions
FR2426903B1 (fr
Inventor
E F Gavrilin
A N Belokur
A L Daiker
V V Basov
A E Konash
N F Moskvin
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.)
INST METALLURG
Original Assignee
INST METALLURG
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 INST METALLURG filed Critical INST METALLURG
Priority to FR7815588A priority Critical patent/FR2426903A1/fr
Publication of FR2426903A1 publication Critical patent/FR2426903A1/fr
Application granted granted Critical
Publication of FR2426903B1 publication Critical patent/FR2426903B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G01N25/72—Investigating presence of flaws

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 Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)

Abstract

L'invention concerne le contrôle non destructif des matériaux. Le procédé faisant l'objet de l'invention est du type comprenant l'application sur le produit 1 d'un revêtement indicateur contenant une substance de fond et une substance de contraste, et est caractérisé notamment en ce que la substance de contraste utilisée est une substance thermosensible changeant de couleur à une température déterminée, et en ce que le revêtement indicateur est appliqué sur le produit 1 à une température relativement basse, puis le produit est chauffé par induction à haute fréquence jusqu'à une température suffisante pour créer le gradient de température nécessaire à la transformation thermochimique de la substance de contraste et son changement de couleur aux endroits où le produit présente des défauts. L'invention peut être utilisée en particulier pour le contrôle de la qualité de la surface des demi-produits laminés à chaud, sans decalaminage de leur surface.
FR7815588A 1978-05-25 1978-05-25 Procede de detection des defauts superficiels et sous-jacents dans les produits lamines Granted FR2426903A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7815588A FR2426903A1 (fr) 1978-05-25 1978-05-25 Procede de detection des defauts superficiels et sous-jacents dans les produits lamines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7815588A FR2426903A1 (fr) 1978-05-25 1978-05-25 Procede de detection des defauts superficiels et sous-jacents dans les produits lamines

Publications (2)

Publication Number Publication Date
FR2426903A1 true FR2426903A1 (fr) 1979-12-21
FR2426903B1 FR2426903B1 (fr) 1981-05-08

Family

ID=9208690

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7815588A Granted FR2426903A1 (fr) 1978-05-25 1978-05-25 Procede de detection des defauts superficiels et sous-jacents dans les produits lamines

Country Status (1)

Country Link
FR (1) FR2426903A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE907946C (de) * 1950-08-25 1954-04-01 Aral Ag B V Verfahren zum Pruefen roehrenfoermiger metallischer Werkstuecke auf Fehler, insbesondere auf Laengsrisse
US3871212A (en) * 1973-05-04 1975-03-18 Goodyear Tire & Rubber System and method for monitoring quality characteristics of a moving web

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE907946C (de) * 1950-08-25 1954-04-01 Aral Ag B V Verfahren zum Pruefen roehrenfoermiger metallischer Werkstuecke auf Fehler, insbesondere auf Laengsrisse
US3871212A (en) * 1973-05-04 1975-03-18 Goodyear Tire & Rubber System and method for monitoring quality characteristics of a moving web

Also Published As

Publication number Publication date
FR2426903B1 (fr) 1981-05-08

Similar Documents

Publication Publication Date Title
CA1013032A (en) Method of testing for and preventing the possibility of cracking, spalling or like defects in a body surface subjected to mechanical forces
FR2426903A1 (fr) Procede de detection des defauts superficiels et sous-jacents dans les produits lamines
US2878151A (en) Method for producing single-fire enameling stock devoid of fish-scaling and product thereof
Lukas et al. Effect of mean stress on short crack threshold
JPS51135590A (en) Surface defect detection method and its equipment
FR2015451A2 (en) Descaling stainless steel
SE405129B (sv) Forfarande for fergning av textilrullar innehallande suntetfibrer med svartferger pa grundval av diazo- eller oxidationsfergningstekniken och enligt extraktionsmetoden
JPS51147378A (en) Flaw detecting method of steel pieces
JPS51114981A (en) Steel surface scar detecting method and equipment
ES362055A1 (es) Procedimiento para producir un material de acero al silicioorientado y no orientado.
JPS5772718A (en) Hot rolling method for steel
JPS53112244A (en) Coiling method for titanium strip
Catot Compressive Stresses Induced in the Rims of Railway Wheels
Koterazawa et al. Propagation of part-through cracks by alternating bending stresses
Fedorov Mechanisms of Crack Initiation and Role of Twins in Dynamic Loading of Fe+ 3. 25% Si Alloy in the 77-573 K Temperature Range
Wu Influence of Residual Copper and Tin and Heating Process on Surface Hot-Shortness or Cracks of Rolled Products of Plain Carbon Steel
JPS53112248A (en) Method and facilities for hot direct rolling of steel material
JPS51121416A (en) Rolls for heat treatment
SU116288A1 (ru) Способ цементации стали в твердом карбюризаторе
Kanno et al. Studies on Crack Formation in Brittle Lacquer Coating: Influence of Loading Time
JPS57155319A (en) Manufacture of steel material for wire having excellent decarburization suppressing property
JPS55128534A (en) Preparation of cold rolled steel plate
Pacl Defects of Oriented Transformer Strips
Blaas Methods of determination of strength of scale adhesion
JPS54155161A (en) Continuous rolling method for rod-hot steel material

Legal Events

Date Code Title Description
ST Notification of lapse