EP0647723B1 - Procédé pour la fabrication de tuyaux d'installation en cuivre durs ou demi-durs, étirés sans soudure - Google Patents

Procédé pour la fabrication de tuyaux d'installation en cuivre durs ou demi-durs, étirés sans soudure Download PDF

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Publication number
EP0647723B1
EP0647723B1 EP19940114354 EP94114354A EP0647723B1 EP 0647723 B1 EP0647723 B1 EP 0647723B1 EP 19940114354 EP19940114354 EP 19940114354 EP 94114354 A EP94114354 A EP 94114354A EP 0647723 B1 EP0647723 B1 EP 0647723B1
Authority
EP
European Patent Office
Prior art keywords
pipes
hard
copper
roughened
thermal treatment
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 - Lifetime
Application number
EP19940114354
Other languages
German (de)
English (en)
Other versions
EP0647723A1 (fr
Inventor
Christian Dipl.-Ing. Triquet
Ulrich Fliegner
Jörg Dipl.-Ing. Matussek
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.)
KM Europa Metal AG
Original Assignee
KM Europa Metal AG
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 KM Europa Metal AG filed Critical KM Europa Metal AG
Publication of EP0647723A1 publication Critical patent/EP0647723A1/fr
Application granted granted Critical
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes
    • 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
    • C22F1/02—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working in inert or controlled atmosphere or vacuum
    • 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 invention relates to a method for producing seamless drawn semi-hard / hard installation pipes Copper, on which the inner surfaces of the pipes are roughened become.
  • EP 0 306 810 A2 describes a process for the production Pitting-resistant, hard-drawn pipes made of copper or copper alloys known, in which the pipes are degreased first and then also the inner surfaces of the pipes an abrasive. This will cause roughening of the inner surfaces that make it possible the formation of harmful films, e.g. carbonaceous Film on the inner surfaces of hard-drawn Avoid copper pipes.
  • pitting corrosion processes a Include copper ion migration, but this after others Regularities expire. So it is generally part of the stand the technology that a high corrosion resistance of copper materials, especially one against pitting corrosion Type 1, not at the same time a lower copper ion release of water.
  • the invention is based on the method, to improve this method so that a diminished Copper ion release to drinking water with a normal pH in the range of 6.5 to 9.0 can be guaranteed.
  • the roughness depth Ra can be between 0.3 ⁇ m and 1.0 ⁇ m move.
  • the roughening of the inner surfaces of the intermediate pipes can according to the features of claim 2 by use abrasives or pickling.
  • Blasting media can e.g. Silicon oxide are used.
  • the intermediate tubes are annealed according to the characteristics of claim 3 preferably with a protective gas, the has an oxygen content of 1% to 7%.
  • the annealing process is preferably at a temperature of about 650 ° C performed. This can a thin adherent oxide layer with a thickness of about 0.05 ⁇ m to 0.2 ⁇ m can be generated.
  • the thermal treatment after the hardening process is carried out accordingly Claim 5 useful at a temperature of about 250 ° C.
  • the hardening train is especially with a Internal mandrel performed.
  • the degree of deformation is Average 20%.
  • the heating can be convective, electrically according to claim 8 be carried out inductively or conductively.
  • phosphorus deoxidized copper (SF-Cu) was melted and poured into bars.
  • the Rods then processed into tubes and then up to cold formed to an intermediate dimension.
  • the intermediate tubes were then at a temperature of 650 ° C continuously introducing a gas mixture into the interior of the pipe heat treated.
  • the gas mixture consisted of one Shielding gas with an oxygen content of 3%. It a firmly adhering thin layer formed on the inner surface Copper oxide layer with a layer thickness of 0.15 ⁇ m, their oxygen content by means of X-ray diffractometry 11.2% was determined.
  • the intermediate pipes were under Use a standard drawing oil with the final dimensions a degree of deformation of 20% hard and then inside degreased by the fact that a commercially available degreasing agent through the pipes.
  • Pipe sections cut to length and deburred to 300 mm were then subjected to oxidizing heat treatment in a laboratory furnace with circulated air as the furnace atmosphere at 250 ° C. for a period of 30 minutes.
  • the oxygen content (O 2 content) of the copper oxide layer now formed on the inner surface of the tubes was determined to be 13.8% by means of energy-dispersive analysis (EDX).
  • the upper limit of the measured values for the copper content in drinking water was 1 mg / l.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Claims (8)

  1. Procédé de fabrication de tubes d'installation semi-durs/durs, étirés, sans soudure, en cuivre, pour lequel les surfaces intérieures des tubes sont rendues rugueuses, caractérisé en ce que
    d'abord on reforme à froid, par étirage à une dimension intermédiaire, des ébauches de tube ayant été reformées à chaud, à partir de barres coulées, puis l'on rend ensuite rugueuses les surfaces intérieures de ces tubes intermédiaires, puis l'on recuit ces tubes intermédiaires à une température de 350° à 650°C, ainsi que dans une atmosphère de gaz protecteur contenant de l'oxygène, introduite à l'intérieur du tube, et
    ensuite les tubes intermédiaires sont soumis à un étirage de durcissement les rendant semi-durs/durs, auquel fait suite un traitement thermique conduit à une température de 175°C à 275°C, avec introduction d'un mélange de gaz contenant de l'oxygène, à l'intérieur du tube.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    les surfaces intérieures des tubes intermédiaires sont rendues rugueuses par un processus de projection ou de décapage.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    le processus de recuit est conduit sous une atmosphère de gaz protecteur à l'intérieur du tube, avec une proportion en oxygène de 1 % à 7 %.
  4. Procédé selon l'une des revendications 1 à 3,
    caractérisé en ce que
    le processus de recuit est conduit à une température d'environ 650°C.
  5. Procédé selon l'une des revendications 1 à 4,
    caractérisé en ce que
    le traitement thermique s effectuant après l'étirage de durcissement est conduit à une température d'environ 250°C.
  6. Procédé selon l'une des revendications 1 à 5,
    caractérisé en ce qu'
    on dégraisse la surface intérieure du tube après avoir effectué l'étirage de durcissement.
  7. Procédé selon l'une des revendications 1 à 6,
    caractérisé en ce que
    lors du traitement thermique des tubes, après l'étirage de durcissement, on utilise un mélange de gaz comportant au moins 20 % d'oxygène.
  8. Procédé selon l'une des revendications 1 à 7,
    caractérisé en ce que
    le chauffage effectué lors du traitement thermique est effectué selon un processus de convexion, d'induction électrique ou de conduction.
EP19940114354 1993-10-09 1994-09-13 Procédé pour la fabrication de tuyaux d'installation en cuivre durs ou demi-durs, étirés sans soudure Expired - Lifetime EP0647723B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19934334536 DE4334536A1 (de) 1993-10-09 1993-10-09 Verfahren zur Herstellung von nahtlos gezogenen halbharten/harten Installationsrohren
DE4334536 1993-10-09

Publications (2)

Publication Number Publication Date
EP0647723A1 EP0647723A1 (fr) 1995-04-12
EP0647723B1 true EP0647723B1 (fr) 2000-04-12

Family

ID=6499828

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940114354 Expired - Lifetime EP0647723B1 (fr) 1993-10-09 1994-09-13 Procédé pour la fabrication de tuyaux d'installation en cuivre durs ou demi-durs, étirés sans soudure

Country Status (4)

Country Link
EP (1) EP0647723B1 (fr)
DE (2) DE4334536A1 (fr)
DK (1) DK0647723T3 (fr)
ES (1) ES2144475T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533410B4 (de) * 1995-09-09 2005-11-24 Km Europa Metal Ag Verfahren zur Erzeugung einer Schutzschicht an der inneren Oberfläche eines Kupferrohrs sowie Verwendung von Ziehmitteln
DE19819925A1 (de) * 1998-05-05 1999-11-11 Km Europa Metal Ag Verfahren zur Erzeugung einer Schutzschicht auf der inneren Oberfläche eines Kupferrohrs
FI107543B (fi) * 1998-07-30 2001-08-31 Outokumpu Oy Menetelmä kupariputken valmistamiseksi
US6293336B1 (en) 1999-06-18 2001-09-25 Elkay Manufacturing Company Process and apparatus for use with copper containing components providing low copper concentrations portable water
FI115120B (fi) * 2003-03-07 2005-03-15 Outokumpu Oy Menetelmä putken sisäpinnan käsittelemiseksi
DE102007055446A1 (de) * 2007-11-12 2009-05-14 Hansgrohe Ag Bereitstellung von wasserführenden Bauteilen aus Messinglegierungen mit verringerter Metallionenfreisetzung
TWI719750B (zh) * 2019-12-10 2021-02-21 金允成企業股份有限公司 鋁合金管件鍛抽成型方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU4928979A (en) * 1978-08-07 1980-02-14 Crane Enfield Metals Pty Limited Production of copper tubing
LU81564A1 (fr) * 1979-07-31 1981-03-24 Liege Usines Cuivre Zinc Procede de fabrication de tubes,tubes obtenus par ce procede et leur utilisation dans des condenseurs et des echangeurs de chaleur
DE3018036A1 (de) * 1980-05-10 1981-11-12 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren von behandlung von kupferrohren
FR2547317B3 (fr) * 1983-06-09 1986-02-28 Trefimetaux Procede d'amelioration de la cintrabilite d'un tube de cuivre ecroui, par recuit partiel
DE3760510D1 (en) * 1987-03-07 1989-10-05 Wieland Werke Ag Process for improving the corrosion resistance of hard or semi-hard copper fitting tubes
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.

Also Published As

Publication number Publication date
DE4334536A1 (de) 1995-04-13
ES2144475T3 (es) 2000-06-16
EP0647723A1 (fr) 1995-04-12
DK0647723T3 (da) 2000-08-28
DE59409284D1 (de) 2000-05-18

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