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EP0281641B1 - Procédé pour améliorer la résistance contre la corrosion de tuyaux d'installation en cuivre durs, ou demi-durs - Google Patents

Procédé pour améliorer la résistance contre la corrosion de tuyaux d'installation en cuivre durs, ou demi-durs Download PDF

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Publication number
EP0281641B1
EP0281641B1 EP87103276A EP87103276A EP0281641B1 EP 0281641 B1 EP0281641 B1 EP 0281641B1 EP 87103276 A EP87103276 A EP 87103276A EP 87103276 A EP87103276 A EP 87103276A EP 0281641 B1 EP0281641 B1 EP 0281641B1
Authority
EP
European Patent Office
Prior art keywords
tubes
hard
heated
corrosion resistance
semi
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
EP87103276A
Other languages
German (de)
English (en)
Other versions
EP0281641A1 (fr
Inventor
Martin Dr. Bauser
Edmund Klingler
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.)
Wieland Werke AG
Original Assignee
Wieland Werke 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8196808&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0281641(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Wieland Werke AG filed Critical Wieland Werke AG
Priority to DE8787103276T priority Critical patent/DE3760510D1/de
Priority to AT87103276T priority patent/ATE45993T1/de
Priority to EP87103276A priority patent/EP0281641B1/fr
Publication of EP0281641A1 publication Critical patent/EP0281641A1/fr
Application granted granted Critical
Publication of EP0281641B1 publication Critical patent/EP0281641B1/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
    • 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
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G5/00—Cleaning or de-greasing metallic material by other methods; Apparatus for cleaning or de-greasing metallic material with organic solvents

Definitions

  • the invention relates to a method according to the preamble of claim 1.
  • Seamless drawn tubes made of phosphorus-deoxidized copper are produced as hard tube tubes and as soft-annealed tubes, especially coils, and are used extensively for the production of cold and hot water pipes in building construction.
  • the invention is therefore based on the object of specifying a method for improving the corrosion resistance of hard or semi-hard pipes.
  • the object is achieved in that the tubes for combustion of the lubricant residues are heated to a temperature which is below the lower limit of the recrystallization range for the tubes, an oxidizing atmosphere being present inside the tube.
  • the temperature for the heating is selected in accordance with the softening curve for copper.
  • the illustration shows the basic course of a softening curve (hardness as a function of temperature).
  • the course of the curve is particularly dependent on the degree of drawing of the pipes and the duration of the heating. For example, as the degree of drawing increases, the start of recrystallization begins at lower temperatures.
  • the pipes can be heated at higher temperatures if the pipes contain, according to the invention, additions of a maximum of 0.1% iron, cobalt, nickel, zinc, aluminum, lead, chromium, cadmium, magnesium, manganese, titanium, tin and / or zirconium (Specification in percent by weight).
  • the tubes are heated at a take-off speed of 40 to 80 m / min.
  • an oxygen-containing gas is preferably supplied to the interior of the tube in such an amount that it is sufficient for the complete combustion of the lubricant residues. It is recommended to introduce air or oxygen-enriched air into the inside of the pipe.
  • Table II shows the strength values (Brinell hardness HB) and residue values measured on the pipes.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Physics & Mathematics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Heat Treatment Of Articles (AREA)
  • Lubricants (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Metal Extraction Processes (AREA)

Claims (8)

1. Méthode destinée à améliorer la résistance à la corrosion de tubes en cuivre desoxydé au phosphore, écrouis ou demi-durs étirés à leur dimension finale, moyennant l'élimination du lubrifiant résiduel se trouvant sur la surface intérieure du tube, caractérisée en ce que les tubes sont chauffés à une température inférieure aux températures de recristallisation des tubes afin de brûler le lubrifiant résiduel et qu'il y a une atmosphère oxydant dans le tube.
2. Méthode selon la revendication 1, caractérisée en ce que la température de réchauffement est choisie selon le diagramme d'adoucissement du cuivre.
3. Méthode selon les revendications 1 ou 2, caractérisée en ce que les tubes sont réchauffés à une température entre 250 et 350°C.
4. Méthode selon les revendications 1 à 3, caractérisée en ce que les tubes contenant des additifs ne dépassant pas un total de 0,1% de fer, cobalt, nickel, zinc, aluminium, plomb, chrome, cadmium, magnésium, manganèse, titane, étain et/ou zirconium sont réchauffés à une température plus élevée que les tubes sans additifs.
5. Méthode selon une ou plusieurs des revendications 1 à 4, caractérisée en ce que les tubes sont réchauffés de façon continue à une vitesse entre 40 et 80 m/min.
6. Méthode selon une ou plusieurs des revendications 1 à 5, caractérisée en ce que l'intérieur du tube est rempli de suffisamment de gaz oxygéné pour brûler le lubrifiant résiduel complètement.
7. Méthode selon revendication 6, caractérisée en ce que de l'air est introduit dans le tube.
8. Méthode selon revendication 6, caractérisée en ce que de l'air oxygéné est introduit dans le tube.
EP87103276A 1987-03-07 1987-03-07 Procédé pour améliorer la résistance contre la corrosion de tuyaux d'installation en cuivre durs, ou demi-durs Expired EP0281641B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DE8787103276T DE3760510D1 (en) 1987-03-07 1987-03-07 Process for improving the corrosion resistance of hard or semi-hard copper fitting tubes
AT87103276T ATE45993T1 (de) 1987-03-07 1987-03-07 Verfahren zur verbesserung der korrosionsbestaendigkeit von harten bzw. halbharten installationsrohren aus kupfer.
EP87103276A EP0281641B1 (fr) 1987-03-07 1987-03-07 Procédé pour améliorer la résistance contre la corrosion de tuyaux d'installation en cuivre durs, ou demi-durs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP87103276A EP0281641B1 (fr) 1987-03-07 1987-03-07 Procédé pour améliorer la résistance contre la corrosion de tuyaux d'installation en cuivre durs, ou demi-durs

Publications (2)

Publication Number Publication Date
EP0281641A1 EP0281641A1 (fr) 1988-09-14
EP0281641B1 true EP0281641B1 (fr) 1989-08-30

Family

ID=8196808

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87103276A Expired EP0281641B1 (fr) 1987-03-07 1987-03-07 Procédé pour améliorer la résistance contre la corrosion de tuyaux d'installation en cuivre durs, ou demi-durs

Country Status (3)

Country Link
EP (1) EP0281641B1 (fr)
AT (1) ATE45993T1 (fr)
DE (1) DE3760510D1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3827353A1 (de) * 1988-08-12 1990-02-22 Kabelmetal Ag Innenoxidierte rohre
DE4334536A1 (de) * 1993-10-09 1995-04-13 Kabelmetal Ag Verfahren zur Herstellung von nahtlos gezogenen halbharten/harten Installationsrohren
FI107543B (fi) 1998-07-30 2001-08-31 Outokumpu Oy Menetelmä kupariputken valmistamiseksi
FI120359B (fi) * 2002-12-18 2009-09-30 Cupori Group Oy Menetelmä ja laitteisto kupari- tai kupariseosputken sisäpinnan käsittelemiseksi
DE102007055446A1 (de) * 2007-11-12 2009-05-14 Hansgrohe Ag Bereitstellung von wasserführenden Bauteilen aus Messinglegierungen mit verringerter Metallionenfreisetzung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU67959A1 (fr) * 1973-07-06 1975-04-11
FR2308436A1 (fr) * 1975-04-25 1976-11-19 Cit Alcatel Traitement des tubes en cuivre et alliages en vue de l'elimination des produits carbones subsistant a leur surface
DE2928084C2 (de) * 1979-07-12 1987-01-02 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zum Behandeln von Kupferrohren
DE3003228C2 (de) 1980-01-30 1981-11-26 Wieland-Werke Ag, 7900 Ulm Verfahren zur Verbesserung der Korrosionsbeständigkeit von Installationsrohren aus Kupfer

Also Published As

Publication number Publication date
EP0281641A1 (fr) 1988-09-14
ATE45993T1 (de) 1989-09-15
DE3760510D1 (en) 1989-10-05

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