EP1349965B1 - PRODUITS LAMINES OU FILES EN ALLIAGE D'ALUMINIUM AL-Mn A RESISTANCE A LA CORROSION AMELIOREE - Google Patents
PRODUITS LAMINES OU FILES EN ALLIAGE D'ALUMINIUM AL-Mn A RESISTANCE A LA CORROSION AMELIOREE Download PDFInfo
- Publication number
- EP1349965B1 EP1349965B1 EP02700316A EP02700316A EP1349965B1 EP 1349965 B1 EP1349965 B1 EP 1349965B1 EP 02700316 A EP02700316 A EP 02700316A EP 02700316 A EP02700316 A EP 02700316A EP 1349965 B1 EP1349965 B1 EP 1349965B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- product according
- less
- tubes
- annealing
- 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
-
- 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
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
Definitions
- the invention relates to rolled or extruded aluminum alloy products Al-Mn (3000 series according to the nomenclature of the Aluminum Association) with resistance to improved corrosion, in particular tubes intended in particular for pipes or tubes and tapes for heat exchangers for construction automobile.
- Alloys usually used for pipes intended for pipes for the automobile and for tubes and tapes for heat exchangers mechanically assembled automobiles are manganese alloys 3102, 3003 or 3103 according to EN 573-3. These alloys have a good aptitude spinning and satisfactory mechanical characteristics. However, he appeared necessary to improve the corrosion resistance for these applications, which has resulted in the appearance of alloys qualified as "long life”.
- the patent application WO 97/46726 of Reynolds Metals relates to an alloy, known under the name X3030, of composition (% by weight): Mn: 0.1 - 0.5 Cu ⁇ 0.03 Mg ⁇ 0.01 Zn: 0.06 - 1.0 Si: 0.05 - 0.12 Fe ⁇ 0.50 Ti: 0.03 - 0, Cr ⁇ 0.50 remains aluminum.
- the addition of Zn and Ti contributes to the improvement of the corrosion resistance.
- Cr is preferably maintained below 0.20% and the examples show contents of 0.005%, 0.05% and 0.10%.
- Fe is preferably maintained below 0.30%, and the examples show contents of 0.10%, 0.12% and 0.20%.
- the patent application WO 99/18250 of the same company relates to a designated alloy X3020 with better formability than the X3030 by addition of Mg (up to 1%) and Zr (up to 0.30%). Cr is preferably maintained below 0.02%, or even 0.01%. Fe is preferably maintained below 0.30%.
- Patent application WO 00/50656 of Norsk Hydro relates to an alloy of composition: Si: 0.05 - 0.15 Fe: 0.06 - 0.35 Cu ⁇ 0.10 Mn: 0.01-1.0 Mg: 0.02 - 0.60 Cr ⁇ 0.25 Zn: 0.05 - 0.70 Ti ⁇ 0.25 Zr ⁇ 0.20
- Cr is preferably maintained below 0.15% and is only allowed for Reasons for recycling manufacturing scrap other alloys.
- Fe is maintained from preferably below 0.22%.
- the object of the invention is to further improve the corrosion resistance with respect to to existing "long life” alloys.
- the subject of the invention is a rolled or spun product, in particular a tube, of alloy of composition (% by weight): If ⁇ 0.30 Fe: 0.20 - 0.50 Cu ⁇ 0.05 Mn: 0.5 - 1.2 Mg ⁇ 0.05 Zn ⁇ 0.50 Cr: 0.10 - 0.30 Ti ⁇ 0 05 Zr ⁇ 0.05 remains aluminum and unavoidable impurities.
- Preferred contents are: Si ⁇ 0.15 Fe: 0.25 - 0.40 Mn: 0.8 - 1.0 Cr: 0.15 - 0.30 Zn: 0.10 - 0.25
- the subject of the invention is also a method for manufacturing spun tubes of this composition comprising the casting of a billet of the preceding composition, possibly the homogenization of this billet, the spinning of a tube, the drawing of this tube in one or more passes and annealing continuously at a temperature included between 350 and 500 ° C with a rise in temperature of less than 10 seconds, and preferably less than 2 seconds.
- the subject of the invention is also a process for producing strips of this composition, comprising the casting of a plate, its hot rolling and then cold rolling, and continuous annealing at a temperature between 350 and 500 ° C with a temperature rise of less than 10 minutes, and preferably less than 2 minutes.
- the alloy according to the invention has a manganese content of the same order as alloys 3003 or 3103 and contains practically no copper or magnesium. Unlike the teaching of the prior art which advocates Low iron levels for corrosion resistance, the alloy presents a good behavior with an iron content greater than 0.20% and up to 0.50%. This avoids the use of a more expensive pure aluminum base. Unlike also the teaching of the prior art, a chromium content greater than 0.10%, and preferably 0.15% has been found to be favorable for resistance to corrosion. Addition of zinc at a low level of less than 0.50%, and preferably 0.20%, is also favorable.
- the process for manufacturing spun products includes the billet casting of the indicated alloy, the homogenization of the billets, their reheating and spinning to obtain a tube in straight length or in a crown, and one or more stretching passes to bring the product to the desired dimensions.
- the tube is then annealed by scrolling at high speed in a passage oven, preferably an induction furnace.
- the heating of the spun product is very fast, less than 10 seconds, and preferably 2 seconds, and the product scrolls to a speed between 20 and 200 m / min.
- the oven temperature is maintained between 350 and 500 ° C.
- the product can then be re-stretched to increase the mechanical resistance.
- This continuous annealing leads to an equiaxized fine grain microstructure, of a size of average grain, measured by the intercepts method, less than 40 ⁇ m, and typically of the order of 30 ⁇ m, whereas with conventional annealing in an oven static, the grains are elongated with a much larger grain size, the order of 180 ⁇ m in the spinning direction and 70 ⁇ m in the direction perpendicular to the spinning.
- the presence of chromium still tends to decrease the size of grain in increasing the density of recrystallization sites, which has a beneficial effect on the corrosion resistance.
- the method of manufacturing the strips comprises casting a plate of the composition according to the invention, optionally the homogenization of this plate, the hot rolling of this plate to obtain a strip, the cold rolling of this band to the desired thickness and a final recrystallization annealing at a temperature between 350 and 600 ° C.
- This final annealing is preferably done in continuous in a through furnace with a temperature rise of less than 10 minutes, and preferably less than 2 minutes, which leads to a grain size Fine.
- the hot rolled strip can also be obtained directly by casting continuous, for example by casting between two cooled rolls.
- the products according to the invention have a better resistance to corrosion than the 3003 or the 3103, and at least as good as the "long life" alloys of art mechanical characteristics and formability equivalent to 3003 or at 3103, and a cost of economic development. They have a potential to electrochemical corrosion almost identical to that of 3003 or 3103, so that there is no difference in the behavior of the galvanic couples, by example the tube-fin pair of heat exchangers. Spun products Furthermore, they have a spinning ability at least as good as that of alloys 3003 or 3103.
- the products spun according to the invention can be used in particular as fuel, oil or brake fluid lines for automobiles and as tubes for heat exchangers cooling systems engine and cabin air conditioning of motor vehicles.
- Bands can be used in the same exchangers for collectors, evaporators or fins.
- the alloys A, B and C correspond to compositions of 3003, 3103 and X3020 of the prior art.
- the alloys D and E differ from the composition according to the invention by a lower iron for D and titanium instead of chromium for E.
- the alloy F is in accordance with the invention.
- the compositions of the alloys (% by weight) are shown in Table 1. Ref.
- the billets were spun into tube crowns and then stretched to obtain a diameter of 12 mm and a thickness of 1.25 mm. No significant difference was recorded for the 6 alloys for their spinning or drawability.
- Corrosion resistance was measured using the salt water acetic acid test (SWAAT) according to ASTM G85. The measurements were made for three cycle times: 100, 400 and 800 cycles, on two tubes per alloy and per length of length 200 mm. At the end of the test, the tubes were removed from the chamber and stripped in a solution of nitric acid concentrated to 68% in order to dissolve the corrosion products. On each tube, the depth of the deepest pits is then measured and the average for each tube is calculated and the average P av of the values obtained for the two tubes. The corrosion resistance is better than P moy is weak. The results are shown in Table 3. Alloy AT B VS D E F 100 cycles 273 220 101 91 164 91 400 cycles 462 375 213 134 151 124 800 cycles 1054 431 368 260 387 249
- alloy F according to the invention is the one that gives the best results, and therefore the iron content of 0.27% does not impair the corrosion resistance, and the addition of 0.20% chromium for alloys D and F has a marked effect beneficial.
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- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Of Metal (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Heat Treatment Of Steel (AREA)
- Laminated Bodies (AREA)
- Powder Metallurgy (AREA)
Description
Mn: 0,1 - 0,5 Cu < 0,03 Mg < 0,01 Zn: 0,06 - 1,0 Si: 0,05 - 0,12 Fe < 0,50 Ti : 0,03 - 0,30 Cr < 0,50 reste aluminium. L'addition de Zn et de Ti contribue à l'amélioration de la résistance à la corrosion. Cr est maintenu de préférence en dessous de 0,20% et les exemples montrent des teneurs de 0,005%, 0,05% et 0,10%. Fe est maintenu de préférence en dessous de 0,30%, et les exemples montrent des teneurs de 0,10%, 0,12% et 0,20%.
Si < 0,30 Fe: 0,20 - 0,50 Cu < 0,05 Mn : 0,5 - 1,2 Mg < 0,05 Zn < 0,50 Cr : 0,10 - 0,30 Ti < 0,05 Zr < 0,05 reste aluminium et impuretés inévitables.
Ref. | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti |
A | 0,09 | 0,19 | 0,15 | 1,05 | - | - | - | - |
B | 0,12 | 0,55 | - | 1,10 | - | - | - | - |
C | 0,07 | 0,08 | - | 0,95 | - | - | 0,17 | 0,14 |
D | 0,08 | 0,10 | - | 1,00 | - | 0,20 | 0,01 | 0,02 |
E | 0,07 | 0,26 | - | 0,98 | - | 0,01 | 0,01 | 0,14 |
F | 0,08 | 0,27 | - | 0,98 | - | 0,19 | 0,17 | 0,01 |
Alliage | A B C | D | E | F | ||
Rm | 116 | 120 | 106 | 112 | 112 | 116 |
R0,2 | 102 | 113 | 95 | 106 | 98 | 108 |
Alliage | A | B | C | D | E | F |
100 cycles | 273 | 220 | 101 | 91 | 164 | 91 |
400 cycles | 462 | 375 | 213 | 134 | 151 | 124 |
800 cycles | 1054 | 431 | 368 | 260 | 387 | 249 |
Claims (15)
- Produit laminé ou filé, notamment un tube, en alliage de composition (% en poids) :
Si < 0,30 Fe: 0,20 - 0,50 Cu < 0,05 Mn : 0,5 - 1,2 Mg < 0,05 Zn < 0,50 Cr: 0,10 - 0,30 Ti < 0,05 Zr < 0,05 reste aluminium et impuretés inévitables. - Produit selon la revendication 1, caractérisé en ce que Si < 0,20
- Produit selon l'une des revendications 1 ou 2, caractérisé en ce que Fe : 0,25 - 0,40.
- Produit selon l'une des revendications 1 à 3, caractérisé en ce que Mn : 0,8 - 1,0.
- Produit selon l'une des revendications 1 à 4, caractérisé en ce que Cr : 0,15 - 0,30.
- Produit selon l'une des revendications 1 à 5, caractérisé en ce que Zn : 0,10 - 0,25.
- Produit filé selon l'une des revendications 1 à 6, caractérisé en ce que sa taille de grain est inférieure à 40 µm.
- Procédé de fabrication de tubes filés selon l'une des revendications 1 à 7, comportant la coulée d'une billette, éventuellement l'homogénéisation de cette billette, le filage d'un tube, l'étirage de ce tube en une ou plusieurs passes et le recuit en continu à une température comprise entre 350 et 500°C avec une montée en température de moins de 10 s.
- Procédé selon la revendication 8, caractérisé en ce que la montée en température se fait en moins de 2 s.
- Procédé selon l'une des revendications 8 ou 9, caractérisé en ce que le recuit se fait dans un four à induction.
- Procédé selon l'une des revendications 8 à 10, caractérisé en ce que le recuit est suivi d'un étirage.
- Utilisation d'un produit filé selon l'une des revendications 1 à 7 comme tube de canalisation pour l'automobile.
- Utilisation d'un produit filé selon l'une des revendications 1 à 7 comme tube d'échangeur thermique d'automobile.
- Procédé de fabrication de bandes selon l'une des revendications 1 à 7, comportant la coulée d'une plaque, éventuellement l'homogénéisation de cette plaque, le laminage à chaud de cette plaque pour obtenir une bande, le laminage à froid de cette bande jusqu'à l'épaisseur désirée et un recuit final de recristallisation à une température comprise entre 350 et 600°C, avec une montée en température de moins de 10 minutes, et de préférence de moins de 2 minutes.
- Utilisation d'une bande selon l'une des revendications 1 à 7 comme élément d'échangeur thermique d'automobile.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0100432A FR2819525B1 (fr) | 2001-01-12 | 2001-01-12 | PRODUITS LAMINES OU FILES EN ALLIAGE D'ALUMINIUM Al-Mn A RESISTANCE A LA CORROSION AMELIOREE |
FR0100432 | 2001-01-12 | ||
PCT/FR2002/000059 WO2002055750A2 (fr) | 2001-01-12 | 2002-01-09 | PRODUITS LAMINES OU FILES EN ALLIAGE D'ALUMINIUM AL-Mn A RESISTANCE A LA CORROSION AMELIOREE |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1349965A2 EP1349965A2 (fr) | 2003-10-08 |
EP1349965B1 true EP1349965B1 (fr) | 2005-02-16 |
Family
ID=8858779
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02700316A Expired - Lifetime EP1349965B1 (fr) | 2001-01-12 | 2002-01-09 | PRODUITS LAMINES OU FILES EN ALLIAGE D'ALUMINIUM AL-Mn A RESISTANCE A LA CORROSION AMELIOREE |
Country Status (7)
Country | Link |
---|---|
US (1) | US6896749B2 (fr) |
EP (1) | EP1349965B1 (fr) |
AT (1) | ATE289364T1 (fr) |
AU (1) | AU2002233405A1 (fr) |
DE (1) | DE60202994T2 (fr) |
FR (1) | FR2819525B1 (fr) |
WO (1) | WO2002055750A2 (fr) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6722286B2 (en) | 1999-12-14 | 2004-04-20 | Hitachi, Ltd. | Structure and railway car |
CN100469926C (zh) * | 2004-02-13 | 2009-03-18 | 株式会社电装 | 换热器用铝合金挤压材料及其制造方法 |
JP5191144B2 (ja) * | 2007-03-02 | 2013-04-24 | 矢崎総業株式会社 | 素線、電線及び素線の製造方法 |
FR2919306B1 (fr) * | 2007-07-27 | 2009-10-02 | Alcan Rhenalu Sa | Produits files en alliage d'aluminium al-mn a resistance mecanique amelioree |
FR2919307B1 (fr) * | 2007-07-27 | 2009-10-02 | Alcan Rhenalu Sa | Produit file en alliage d'aluminium ai-mg-si a resistance a la corrosion amelioree |
BRPI0915111B1 (pt) * | 2008-06-10 | 2019-12-17 | Rio Tinto Alcan International Limited | processo para fabricar uma tubulação de liga de alumínio extrudada ou estirada, e tubos extrudados trocadores de calor de liga de alumínio |
CN102506602A (zh) * | 2011-09-26 | 2012-06-20 | 江苏格林威尔金属材料科技有限公司 | 热交换器用铝合金内槽圆管及其制造方法 |
CN103014385B (zh) * | 2012-12-03 | 2016-01-06 | 滁州迪蒙德模具制造有限公司 | 高耐磨铝合金发泡模铸件的加工工艺 |
CN105132752A (zh) * | 2015-08-06 | 2015-12-09 | 苏州好洁清洁器具有限公司 | 一种高性能铝合金管材及其加工方法 |
CN105734354B (zh) * | 2016-03-31 | 2017-09-12 | 河南机电高等专科学校 | 一种铝锡铜合金基轴瓦材料及其制备方法 |
CN105626695B (zh) * | 2016-03-31 | 2018-05-04 | 河南机电高等专科学校 | 一种铝基-钢双金属轴瓦材料及其制备工艺 |
CN105734363B (zh) * | 2016-04-27 | 2017-09-05 | 贵州航天风华精密设备有限公司 | 一种铝镁合金构件的成型方法 |
US11255002B2 (en) | 2016-04-29 | 2022-02-22 | Rio Tinto Alcan International Limited | Corrosion resistant alloy for extruded and brazed products |
CN112254563A (zh) * | 2019-07-22 | 2021-01-22 | 海德鲁铝业(苏州)有限公司 | 具有高耐腐蚀性的长寿命铝合金和由该合金生产的螺旋槽管 |
WO2022120639A1 (fr) | 2020-12-09 | 2022-06-16 | Hydro Extruded Solutions As | Alliage d'aluminium ayant une résistance et une recyclabilité améliorées |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4167410A (en) * | 1977-03-03 | 1979-09-11 | Swiss Aluminium Ltd. | Alloy for use in brazed assemblies |
US4334935A (en) * | 1980-04-28 | 1982-06-15 | Alcan Research And Development Limited | Production of aluminum alloy sheet |
FR2614901B1 (fr) * | 1987-05-05 | 1992-07-24 | Cegedur | Alliages d'aluminium pour echangeur de chaleur brase |
US5906689A (en) * | 1996-06-06 | 1999-05-25 | Reynolds Metals Company | Corrosion resistant aluminum alloy |
US5976278A (en) * | 1997-10-03 | 1999-11-02 | Reynolds Metals Company | Corrosion resistant, drawable and bendable aluminum alloy, process of making aluminum alloy article and article |
US6284386B1 (en) * | 1998-05-15 | 2001-09-04 | Alcan International Limited | Aluminum alloy products with high resistance to pitting corrosion |
US20020007881A1 (en) * | 1999-02-22 | 2002-01-24 | Ole Daaland | High corrosion resistant aluminium alloy |
-
2001
- 2001-01-12 FR FR0100432A patent/FR2819525B1/fr not_active Expired - Lifetime
-
2002
- 2002-01-09 DE DE60202994T patent/DE60202994T2/de not_active Expired - Lifetime
- 2002-01-09 EP EP02700316A patent/EP1349965B1/fr not_active Expired - Lifetime
- 2002-01-09 US US10/416,511 patent/US6896749B2/en not_active Expired - Lifetime
- 2002-01-09 AT AT02700316T patent/ATE289364T1/de not_active IP Right Cessation
- 2002-01-09 AU AU2002233405A patent/AU2002233405A1/en not_active Abandoned
- 2002-01-09 WO PCT/FR2002/000059 patent/WO2002055750A2/fr not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
AU2002233405A1 (en) | 2002-07-24 |
WO2002055750A2 (fr) | 2002-07-18 |
FR2819525A1 (fr) | 2002-07-19 |
US6896749B2 (en) | 2005-05-24 |
DE60202994T2 (de) | 2006-04-13 |
FR2819525B1 (fr) | 2003-02-28 |
US20040040634A1 (en) | 2004-03-04 |
WO2002055750A3 (fr) | 2002-09-26 |
DE60202994D1 (de) | 2005-03-24 |
EP1349965A2 (fr) | 2003-10-08 |
ATE289364T1 (de) | 2005-03-15 |
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