EP0128846B1 - Procédé d'amélioration de la cintrabilité d'un tube de cuivre écroui, par recuit partiel - Google Patents

Procédé d'amélioration de la cintrabilité d'un tube de cuivre écroui, par recuit partiel Download PDF

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Publication number
EP0128846B1
EP0128846B1 EP84420101A EP84420101A EP0128846B1 EP 0128846 B1 EP0128846 B1 EP 0128846B1 EP 84420101 A EP84420101 A EP 84420101A EP 84420101 A EP84420101 A EP 84420101A EP 0128846 B1 EP0128846 B1 EP 0128846B1
Authority
EP
European Patent Office
Prior art keywords
cold
improving
worked copper
mpa
flexibility
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.)
Expired
Application number
EP84420101A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0128846A1 (fr
Inventor
Bernard Fargette
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.)
Trefimetaux SAS
Original Assignee
Trefimetaux SAS
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 Trefimetaux SAS filed Critical Trefimetaux SAS
Priority to AT84420101T priority Critical patent/ATE21418T1/de
Publication of EP0128846A1 publication Critical patent/EP0128846A1/fr
Application granted granted Critical
Publication of EP0128846B1 publication Critical patent/EP0128846B1/fr
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon

Definitions

  • the present invention relates to a process for improving the workability of hardened copper tubes. It applies more particularly to straight copper tubes, work hardened, used for sanitary installations whose external diameter is most often between 8 and 22 millimeters, and whose thickness is generally 1 millimeter.
  • These tubes includes bending operations which are carried out either on site with manual benders, or in the workshop with automatic benders with pneumatic or hydraulic control.
  • annealed tube is excluded because of its excessive ductility which leads to unsightly deformations in the case of installations where the tube is visible.
  • annealing which, surprisingly only concerns the external cortical zone of the tube, and leaves the deep zones intact; annealing is carried out at low temperature between 150 and 350 ° C, and for a period of between 5 minutes and 24 hours, and in practice, between 15 minutes and 1 hour, the temperature then being between 260 and 310 ° C.
  • Figure 1 shows the micrographic appearance of a tube treated according to the invention.
  • the recrystallization of the cortical zone inhibits the development of a necking on the external fiber of the tube, during bending, which eliminates practically all the surface defects, while, the elastic limit remaining high, the tubes keep a great rigidity, this which allows their use under the same conditions as the straight work hardened tubes used until now.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Metallurgy (AREA)
  • Materials Engineering (AREA)
  • Heat Treatment Of Articles (AREA)
  • Metal Extraction Processes (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Materials For Medical Uses (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Conductive Materials (AREA)
  • Forging (AREA)
EP84420101A 1983-06-09 1984-06-08 Procédé d'amélioration de la cintrabilité d'un tube de cuivre écroui, par recuit partiel Expired EP0128846B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84420101T ATE21418T1 (de) 1983-06-09 1984-06-08 Verfahren zur erhoehung der flexibilitaet von kaltgezogenen kupferroehren durch randgluehen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8309942A FR2547317B3 (fr) 1983-06-09 1983-06-09 Procede d'amelioration de la cintrabilite d'un tube de cuivre ecroui, par recuit partiel
FR8309942 1983-06-09

Publications (2)

Publication Number Publication Date
EP0128846A1 EP0128846A1 (fr) 1984-12-19
EP0128846B1 true EP0128846B1 (fr) 1986-08-13

Family

ID=9289835

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84420101A Expired EP0128846B1 (fr) 1983-06-09 1984-06-08 Procédé d'amélioration de la cintrabilité d'un tube de cuivre écroui, par recuit partiel

Country Status (6)

Country Link
EP (1) EP0128846B1 (es)
AT (1) ATE21418T1 (es)
DE (1) DE3460477D1 (es)
ES (1) ES8503035A1 (es)
FR (1) FR2547317B3 (es)
IE (1) IE56119B1 (es)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1006273B (de) * 1954-05-10 1957-04-11 Daimler Benz Ag Mechanische Fernschaltung von Wechselgetrieben fuer Omnibusse und andere Grosskraftfahrzeuge
FR2668170B1 (fr) * 1990-10-18 1992-12-11 Trefimetaux Procede d'amelioration de la cintrabilite de tubes de cuivre a l'etat dur par traitement thermique dynamique.
DE4334536A1 (de) * 1993-10-09 1995-04-13 Kabelmetal Ag Verfahren zur Herstellung von nahtlos gezogenen halbharten/harten Installationsrohren

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3708354A (en) * 1971-06-09 1973-01-02 Anaconda American Brass Co Method and apparatus for measuring and controlling the continuous annealing of a long length of metal tubing
US3774431A (en) * 1972-07-10 1973-11-27 Asea Ab Method of manufacturing copper tubes by means of hydrostatic extrusion and press equipment for carrying out the method

Also Published As

Publication number Publication date
ES533241A0 (es) 1985-02-01
IE56119B1 (en) 1991-04-24
FR2547317A1 (fr) 1984-12-14
DE3460477D1 (en) 1986-09-18
ATE21418T1 (de) 1986-08-15
EP0128846A1 (fr) 1984-12-19
FR2547317B3 (fr) 1986-02-28
IE841436L (en) 1984-12-09
ES8503035A1 (es) 1985-02-01

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