EP0647723B1 - Verfahren zur Herstellung von nahtlos gezogenen halbharten/harten Installationsrohren - Google Patents
Verfahren zur Herstellung von nahtlos gezogenen halbharten/harten Installationsrohren Download PDFInfo
- 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
Links
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)
Description
Claims (8)
- Verfahren zur Herstellung von nahtlos gezogenen halbharten/harten Installationsrohren aus Kupfer, bei welchem die Innenoberflächen der Rohre aufgerauht werden, dadurch gekennzeichnet, daß zunächst aus gegossenen Stangen warmumgeformte Vorrohre durch Ziehen auf eine Zwischenabmessung kaltumgeformt werden, worauf die Innenoberflächen dieser Zwischenrohre aufgerauht und dann diese aufgerauhten Zwischenrohre bei einer Temperatur von 350 °C bis 650 °C sowie bei in das Rohrinnere eingeleitetem, Sauerstoff enthaltendem Schutzgas geglüht werden, und daß danach die Zwischenrohre einem halbharten/harten Härtezug unterworfen werden, an den sich eine thermische Behandlung mit einer Temperatur von 175 °C bis 275 °C unter Einleitung eines sauerstoffhaltigen Gasgemisches in das Rohrinnere anschließt.
- Verfahren nach Patentanspruch 1, dadurch gekennzeichnet, daß die Innenoberflächen der Zwischenrohre durch Strahlen oder Beizen aufgerauht werden.
- Verfahren nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, daß der Glühvorgang bei einer Schutzgasatmosphäre im Rohrinneren mit einem Sauerstoffanteil von 1 % bis 7 % durchgeführt wird.
- Verfahren nach einem der Patentansprüche 1 bis 3, dadurch gekennzeichnet, daß der Glühvorgang bei einer Temperatur von etwa 650 °C durchgeführt wird.
- Verfahren nach einem der Patentansprüche 1 bis 4, dadurch gekennzeichnet, daß die nach dem Härtezug erfolgende thermische Behandlung bei einer Temperatur von etwa 250 °C durchgeführt wird.
- Verfahren nach einem der Patentansprüche 1 bis 5, dadurch gekennzeichnet, daß nach dem Härtezug die Innenoberfläche der Rohre entfettet wird.
- Verfahren nach einem der Patentansprüche 1 bis 6, dadurch gekennzeichnet, daß bei der thermischen Behandlung der Rohre nach dem Härtezug ein Gasgemisch mit mindestens 20 % Sauerstoff verwendet wird.
- Verfahren nach einem der Patentansprüche 1 bis 7, dadurch gekennzeichnet, daß die Erwärmung bei der thermischen Behandlung konvektiv, elektrisch induktiv oder konduktiv durchgeführt wird.
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 (de) | 1995-04-12 |
| EP0647723B1 true EP0647723B1 (de) | 2000-04-12 |
Family
ID=6499828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19940114354 Expired - Lifetime EP0647723B1 (de) | 1993-10-09 | 1994-09-13 | Verfahren zur Herstellung von nahtlos gezogenen halbharten/harten Installationsrohren |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0647723B1 (de) |
| DE (2) | DE4334536A1 (de) |
| DK (1) | DK0647723T3 (de) |
| ES (1) | ES2144475T3 (de) |
Families Citing this family (7)
| 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)
| 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. |
-
1993
- 1993-10-09 DE DE19934334536 patent/DE4334536A1/de not_active Withdrawn
-
1994
- 1994-09-13 EP EP19940114354 patent/EP0647723B1/de not_active Expired - Lifetime
- 1994-09-13 ES ES94114354T patent/ES2144475T3/es not_active Expired - Lifetime
- 1994-09-13 DK DK94114354T patent/DK0647723T3/da active
- 1994-09-13 DE DE59409284T patent/DE59409284D1/de not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| DE59409284D1 (de) | 2000-05-18 |
| DK0647723T3 (da) | 2000-08-28 |
| DE4334536A1 (de) | 1995-04-13 |
| ES2144475T3 (es) | 2000-06-16 |
| EP0647723A1 (de) | 1995-04-12 |
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