EP0976845A1 - Procédé pour la fabrication de tubes en cuivre - Google Patents

Procédé pour la fabrication de tubes en cuivre Download PDF

Info

Publication number
EP0976845A1
EP0976845A1 EP99114365A EP99114365A EP0976845A1 EP 0976845 A1 EP0976845 A1 EP 0976845A1 EP 99114365 A EP99114365 A EP 99114365A EP 99114365 A EP99114365 A EP 99114365A EP 0976845 A1 EP0976845 A1 EP 0976845A1
Authority
EP
European Patent Office
Prior art keywords
tube
annealing
oxygen
tubes
gas
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
EP99114365A
Other languages
German (de)
English (en)
Other versions
EP0976845B1 (fr
Inventor
Seppo Välimäki
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.)
CUPORI GROUP OY
Original Assignee
Outokumpu Oyj
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 Outokumpu Oyj filed Critical Outokumpu Oyj
Publication of EP0976845A1 publication Critical patent/EP0976845A1/fr
Application granted granted Critical
Publication of EP0976845B1 publication Critical patent/EP0976845B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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

Definitions

  • This invention focuses on a method for producing copper tube and particularly for hard-drawn temper sanitary tube.
  • the extruded tube shell is cold formed until almost its final size, after which the tube undergoes inline annealing in oxidizing conditions in order to adjust the tube to its final size in the cold forming step with finally sand blasting to the inner surface of the tube.
  • the use of organic solvents is avoided and at the same time a tube with excellent corrosion resistance is achieved.
  • the conventional method for treating hard tubes has comprised cold forming steps following extrusion, such as bull-block drawing, straightening and cutting and subsequent degreasing, in which drawing lubricant is removed from the inner surface of the tube. Residual lubricant is removed so that it does not form a carbon film during installation, which in turn would promote pitting.
  • this degreasing step has involved immersing the tubes in an organic solvent such as trichloroethylene.
  • EP patent application 647 723 describes a manufacturing method for half hard or hard tubes, where the intention is for the tube to release as small an amount of copper ions as possible into for example normal drinking water.
  • the tube shell is cold formed to an intermediate size, after which the inner surface is roughened.
  • the roughening can be either performed by sand blasting or etching (Beizen).
  • the tube is routed to annealing treatment at a temperature of 350 - 650 °C, wherein a mixture of shielding gas and oxygen (1-7% O 2 ) is introduced into the tube, in order to form a protective oxide film to the inner surface of the tube.
  • the tube subsequently undergoes cold drawing to a final size, wherein the reduction is about 20%.
  • the tube can be degreased after cold drawing. After the final draw the tube is subjected to further thermal treatment at a temperature of 175 - 275 °C in the presence of oxygenous gas (at least 20% O 2 ). The result of this treatment is that a very stable malachite layer forms rapidly on the inner surface of the tube, which prevents the dissolution of copper ions into drinking water.
  • hard copper tubes suitable for sanitary installations can be manufactured in a simple fashion.
  • the extruded tube shell is drawn using conventional cold forming technology until almost its final size.
  • oxygen or oxygen-enriched gas is conducted into the tube coil, and the tube is heated by inline annealing briefly at a temperature of 450 - 650 °C, preferably 500 - 600 °C. In so doing, any residual lubricants on the inner surface are be burnt off.
  • the tube undergoes a final, approx. 5-20% forming step. After this the tube is cut to the specified size and the inner surface of the tube is sand blasted.
  • the drawing of the tube through the annealing furnace is carried out at such a speed, 100 - 200 m/min, preferably 120 - 160 m/min, that the structure has not time to recrystallize or soften.
  • there is oxygen or oxygen-enriched gas inside the tube with oxygen enrichment of at least 20% and preferably at least 50%.
  • the tube is formed in such a way that its values are well within the region of hard tube.
  • One advantage of drawing after annealing is that the tube will be formed precisely to the tolerance sets.
  • Copper tube was manufactured as normal by extrusion and bull-block drawing, but in the final bull-block drawing the tube was left at a bigger size than the final one.
  • the tube coil was filled with oxygen-containing gas and heated briefly at a temperature of 500-650 °C.
  • the table below lists the properties of the tube after the final drawing (tube size 15 x 1 mm) and a comparison with the requirements set by standard EN1057 for hard tubes. Bending according to the standard means that the bending test is performed in accordance with the conditions laid down in standard EN 10232, so no tear shall be visible to the unaided eye at this stage.
  • the 1 st class mentioned in the test results means that the tube meets the stringent requirements of the standard.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Metal Extraction Processes (AREA)
  • Laminated Bodies (AREA)
  • Heat Treatment Of Articles (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
EP99114365A 1998-07-30 1999-07-21 Procédé pour la fabrication de tubes en cuivre Expired - Lifetime EP0976845B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI981683A FI107543B (fi) 1998-07-30 1998-07-30 Menetelmä kupariputken valmistamiseksi
FI981683 1998-07-30

Publications (2)

Publication Number Publication Date
EP0976845A1 true EP0976845A1 (fr) 2000-02-02
EP0976845B1 EP0976845B1 (fr) 2003-07-16

Family

ID=8552250

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99114365A Expired - Lifetime EP0976845B1 (fr) 1998-07-30 1999-07-21 Procédé pour la fabrication de tubes en cuivre

Country Status (9)

Country Link
EP (1) EP0976845B1 (fr)
AT (1) ATE245208T1 (fr)
DE (1) DE69909565T2 (fr)
DK (1) DK0976845T3 (fr)
ES (1) ES2202969T3 (fr)
FI (1) FI107543B (fr)
NO (1) NO312619B1 (fr)
PL (1) PL189820B1 (fr)
PT (1) PT976845E (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1167563A1 (fr) * 2000-06-20 2002-01-02 Outokumpu Oyj Procédé de fabrication de tuyaux en cuivre ou en alliage de cuivre avec revêtement intérieur
WO2004055230A1 (fr) * 2002-12-18 2004-07-01 Outokumpu Oyj Procede et dispositif permettant de traiter la surface interieure d'un tuyau en cuivre ou en alliage de cuivre
CN101492798B (zh) * 2009-03-13 2010-12-29 无锡隆达金属材料有限公司 铜合金管材无酸洗制造工艺
CN111979390A (zh) * 2020-07-02 2020-11-24 中国船舶重工集团公司第七二五研究所 一种去除小口径海水铜镍管内表面残碳的方法

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110605304A (zh) * 2019-09-18 2019-12-24 上海海亮铜业有限公司 铝黄铜薄壁管生产工艺

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1461961A (en) * 1973-07-06 1977-01-19 Liege Usines Cuivre Zinc Method of cleaning the internal surfaces of copper tubes
GB2055061A (en) * 1979-07-31 1981-02-25 Liege Usines Cuivre Zinc Improvements concerning copper or copper-alloy tubes for pipes used in sanitary, condenser and other installations
DE3003228B1 (de) * 1980-01-30 1981-03-26 Wieland-Werke Ag, 89079 Ulm Verfahren zur Verbesserung der Korrosionsbestaendigkeit von Installationsrohren aus Kupfer
US4351678A (en) * 1980-08-06 1982-09-28 Usines A Cuivre Et A Zinc De Liege Method of making corrosion resistant phosphorous copper or phosphorous copper alloy pipes
US4393566A (en) * 1980-05-10 1983-07-19 Kabel-Und Metallwerke Gutehoffnungshutte Ag Processing of copper tubing
EP0281641A1 (fr) 1987-03-07 1988-09-14 Wieland-Werke Ag Procédé pour améliorer la résistance contre la corrosion de tuyaux d'installation en cuivre durs, ou demi-durs
EP0306810A2 (fr) 1987-09-10 1989-03-15 KM Europa Metal Aktiengesellschaft Procédé pour la fabrication de tubes en cuivre ou en alliages cuivreux étirés à froid et résistant à la corrosion
EP0335999A1 (fr) * 1988-04-08 1989-10-11 Wieland-Werke AG Méthode de nettoyage des tubes métalliques, en particulier des tubes en cuivre
EP0356732A1 (fr) * 1988-08-12 1990-03-07 KM-kabelmetal Aktiengesellschaft Tuyau oxydé intérieurement
EP0647723A1 (fr) * 1993-10-09 1995-04-12 KM Europa Metal Aktiengesellschaft Procédé pour la fabrication de tuyaux d'installation en cuivre durs ou demi-durs, étirés sans soudure

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1461961A (en) * 1973-07-06 1977-01-19 Liege Usines Cuivre Zinc Method of cleaning the internal surfaces of copper tubes
GB2055061A (en) * 1979-07-31 1981-02-25 Liege Usines Cuivre Zinc Improvements concerning copper or copper-alloy tubes for pipes used in sanitary, condenser and other installations
DE3003228B1 (de) * 1980-01-30 1981-03-26 Wieland-Werke Ag, 89079 Ulm Verfahren zur Verbesserung der Korrosionsbestaendigkeit von Installationsrohren aus Kupfer
US4393566A (en) * 1980-05-10 1983-07-19 Kabel-Und Metallwerke Gutehoffnungshutte Ag Processing of copper tubing
US4351678A (en) * 1980-08-06 1982-09-28 Usines A Cuivre Et A Zinc De Liege Method of making corrosion resistant phosphorous copper or phosphorous copper alloy pipes
EP0281641A1 (fr) 1987-03-07 1988-09-14 Wieland-Werke Ag Procédé pour améliorer la résistance contre la corrosion de tuyaux d'installation en cuivre durs, ou demi-durs
EP0306810A2 (fr) 1987-09-10 1989-03-15 KM Europa Metal Aktiengesellschaft Procédé pour la fabrication de tubes en cuivre ou en alliages cuivreux étirés à froid et résistant à la corrosion
EP0335999A1 (fr) * 1988-04-08 1989-10-11 Wieland-Werke AG Méthode de nettoyage des tubes métalliques, en particulier des tubes en cuivre
EP0356732A1 (fr) * 1988-08-12 1990-03-07 KM-kabelmetal Aktiengesellschaft Tuyau oxydé intérieurement
EP0647723A1 (fr) * 1993-10-09 1995-04-12 KM Europa Metal Aktiengesellschaft Procédé pour la fabrication de tuyaux d'installation en cuivre durs ou demi-durs, étirés sans soudure

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1167563A1 (fr) * 2000-06-20 2002-01-02 Outokumpu Oyj Procédé de fabrication de tuyaux en cuivre ou en alliage de cuivre avec revêtement intérieur
WO2004055230A1 (fr) * 2002-12-18 2004-07-01 Outokumpu Oyj Procede et dispositif permettant de traiter la surface interieure d'un tuyau en cuivre ou en alliage de cuivre
EA011199B1 (ru) * 2002-12-18 2009-02-27 Отокумпу Оюй Способ и устройство для обработки внутренней поверхности трубки из меди или медного сплава
CN101492798B (zh) * 2009-03-13 2010-12-29 无锡隆达金属材料有限公司 铜合金管材无酸洗制造工艺
CN111979390A (zh) * 2020-07-02 2020-11-24 中国船舶重工集团公司第七二五研究所 一种去除小口径海水铜镍管内表面残碳的方法

Also Published As

Publication number Publication date
DE69909565D1 (de) 2003-08-21
FI107543B (fi) 2001-08-31
DK0976845T3 (da) 2003-10-27
PL189820B1 (pl) 2005-09-30
NO993683D0 (no) 1999-07-29
ES2202969T3 (es) 2004-04-01
DE69909565T2 (de) 2004-01-29
EP0976845B1 (fr) 2003-07-16
FI981683A (fi) 2000-01-31
FI981683A0 (fi) 1998-07-30
NO993683L (no) 2000-01-31
PT976845E (pt) 2003-10-31
ATE245208T1 (de) 2003-08-15
NO312619B1 (no) 2002-06-10
PL334652A1 (en) 2000-01-31

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