EP1287175A1 - Alliage d'aluminium inoxydable - Google Patents

Alliage d'aluminium inoxydable

Info

Publication number
EP1287175A1
EP1287175A1 EP01940521A EP01940521A EP1287175A1 EP 1287175 A1 EP1287175 A1 EP 1287175A1 EP 01940521 A EP01940521 A EP 01940521A EP 01940521 A EP01940521 A EP 01940521A EP 1287175 A1 EP1287175 A1 EP 1287175A1
Authority
EP
European Patent Office
Prior art keywords
weight
alloy
content ranges
aluminium
alloys
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.)
Withdrawn
Application number
EP01940521A
Other languages
German (de)
English (en)
Inventor
Lars Auran
Trond Furu
Ole Daaland
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.)
Yara Technology BV
Norsk Hydro Technology AS
Original Assignee
Norsk Hydro Technology BV
Norsk Hydro Technology AS
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 Norsk Hydro Technology BV, Norsk Hydro Technology AS filed Critical Norsk Hydro Technology BV
Priority to EP01940521A priority Critical patent/EP1287175A1/fr
Publication of EP1287175A1 publication Critical patent/EP1287175A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
    • F28F21/081—Heat exchange elements made from metals or metal alloys
    • F28F21/084—Heat exchange elements made from metals or metal alloys from aluminium or aluminium alloys
    • 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
    • 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
    • C22C21/02—Alloys based on aluminium with silicon as the next major constituent
    • 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
    • C22C21/10—Alloys based on aluminium with zinc as the next major constituent

Definitions

  • the present invention is directed to a group of corrosion resistant and extrudable aluminium alloys with improved elevated temperature strenght, especially to a AA3000 series type aluminium alloy including controlled amounts of titanium, vanadium and zirconium for improved extrudability and/or drawability.
  • aluminium is well recognized for its corrosion resistance.
  • AA1000 series aluminium alloys are often selected where corrosion resistance is needed.
  • AA1000 series alloys have been replaced with more highly alloyed materials such as the AA3000 series types aluminium alloys.
  • AA3102 and AA3003 are examples of higher strength aluminium alloys having good corrosion resistance.
  • Aluminium alloys of the AA3000 series type have found extensive use in the automotive industry due to their good combination of strength, light weight, corrosion resistance and extrudability. These alloys are often made into tubing for use in heat exchanger or air conditioning condenser applications.
  • U.S. Patent no. 5,286,316 discloses an aluminium alloy with both high extrudability and high corrosion resistance.
  • This alloy consists essentially of about 0.1 - 0.5 % by weight of manganese, about 0.05 - 0.12 % by weight of silicon, about 0.10 - 0.20 % by weight of titanium, about 0.15 - 0.25 % by weight of iron, with the balance aluminium and incidental impurities.
  • the alloy preferably is essentially copper free, with copper being limited to not more than 0.01 %.
  • the alloy disclosed in U.S. Patent no. 5,286,316 offers improved corrosion resistance over AA3102, even more corrosion resistance is desirable.
  • a still further object of the present invention is to provide an aluminium alloy which has good both hot- and cold- formability and corrosion resistance.
  • the present invention provides a corrosion resistant aluminium alloy consisting essentially of, in weight percent, 0,05 - 1 ,00 % of iron, 0,05 - 0,60 % of silicon, less than 0,50 % of copper, up to 1 ,20 % of manganese, 0,02 - 0,20 % of zirconium, up to 0,50 % of chromium, 0,02 to 1 ,00 % of zinc, 0,02 - 0,20 % of titanium, 0,02 - 0,20 % of vanadium, up to 2,00 % of magnesium, up to 0,10 % of antimony, up to 0,02 % of incidental impurities and the balance aluminium.
  • iron preferably is between 0,05 - 0,55 %, more preferably, between 0,05 - 0,25 %. Reducing the Fe content improves the corrosion resistance. Silicon is preferably between 0,05 and 0,20 %, more preferably, not more than 0,15 %. Copper is below 0,50 %, as this elements normally negatively influences the extrusion speed and the corrosion resistance. But in some circumstances some copper might be needed to adjust the electro-potential of the allay. Preferablly the Cu-content is below 0,05 % by weight. Zirconium is preferably between 0,02 and 0,18 %.
  • Zn should always be present in at least 0,02 % by weight in order to improve the general level of corrosion resistance and preferably zinc content is between 0,10 and 0,50 %, more preferably between 0,10 and 0,25 %.
  • Ttitanium is preferably between 0,02 and 0,15 %, and vanadium is preferably between 0,02 and 0,12 %.
  • the preferred amount of manganese is highly dependent on the intended use of the article because manganese impacts extrudability, especially with thin sections. For applications with these type of alloys in which the corrosion resistance and excellent extrudability is the primary concern, manganese is preferably present in amounts between 0,05 - 0,30 % by weight. Fe is preferably present in amounts between 0,05 - 0,25 % by weight.
  • the preferred amount of chromium is between 0,02 and 0,25%.
  • the magnesium amount is preferably below 0,03 %.
  • Zn is preferably present in amounts between 0,10 - 0,5 % by weight.
  • chromium is preferably between 0,02 and 0,18 % by weight and magnesium below 0,30 % by weight, for brazeability reasons.
  • the Fe content should be kept low for improved corrosion resistance.
  • chromium is added to further improve corrosion resistance.
  • Zn is added to further improve corrosion resistance.
  • controlled additions of V, Zr and Ti are made to further improve, corrosion resistance.
  • the role of V, Ti and especially Zr becomes important.
  • the amounts added of each of these elements will depend on the functional requirements, however, the amount of zirconium is preferably between 0,10 and 0,18 % by weight.
  • post heat treatment of the cast alloy in that it is heated to a temperature of between 450 and 550°C with a heating rate of less than 150 °C/hour, and maintain the alloy at that temperature for between 2 and 10 hours.
  • the final product may also for certain applications and especially after cold working, require a "back annealing" treatment consisting of heating the work piece to temperatures between 150 and 350 degrees Centigrade and keep at temperature for between 10 and 10000 min.
  • Zr and Ti in solid solution are used separately to improve corrosion resistance in low alloy highly extrudable alloys e.g. for use in extruded tubes for automotive AC systems.
  • the useful maximum additions of Zr and Ti when added separately is less than 0,2% by weight. Above this level primary compounds are formed that reduces the level of these elements in solid solution.
  • the primary compounds from Zr and Ti (AI3Zr, AI3Ti) may initiate pitting corrosion as they are more noble than the Al matrix. Both Zr and Ti will upon solidification go through a peritectic reaction. The product of this reaction is revealed as a highly concentrated region of the elements in the centre of the grain (large positive partition ratio). These regions or zones will upon rolling or extrusion form a lamellae structure parallel to the surface of the work piece and slow down the corrosion in the through thickness direction.
  • V is an element with much the same behaviour and effect as Zr and Ti, but has up to now not been used much in these type of alloys. V will improve the mechanical properties in the same way as Zr and Ti, but do not have the same effect on corrosion unless the Zr-content is higher than the V-content.
  • the transition elements such as Zr, Ti, and V are known to improve formability by increasing the work hardening coefficient ("n").
  • the "n” increases with increased amount of the transition elements almost linearly up to some 0,5%.
  • Zr, Ti and V up to 0,45% of the transition elements may be added without the formation of deleterious primary particles of the type AI3Zr, as opposed to below 0,2% if only one of the elements is added. But it has found otherwise that above a total level of 0,3 % by weight some characteristics are negatively influenced.
  • Zr, Ti and V, and in particular Zr are known to impede the tendency of recrystalization, provided optimum heat treatment before high temperature processing.
  • the ability to retard recrystalization is related to the number and size of small coherent/semi-coherent precipitates that are stable at temperature up to 300- 400 degrees Centigrade for prolonged times.
  • the fine polygenized structure that will result from back annealing at temperatures in the 150 to 350 degrees Centigrade range will have higher mechanical strength than the corresponding recrystalized structure resulting in the absence of such transition elements.
  • the density of these precipitates increases with increased amount of the transition elements, therefore combining the three elements would improve the mechanical property in the temperature range from ambient temperature to approx. 400 degrees Centigrade.
  • Billets with different content of Zr, V and Ti were cast using the laboratory casting equipment at Sunndals ⁇ ra. For each alloy, four billets with a diameter of 95 mm and a length of 1.1 m were produced. At the beginning of the casting the casting speed was 115 mm/min, increasing to 240 mm/min after 15 cm cast billet. The temperature in the launder was set to be 705°C and the temperature was recorded during casting. Grain refiner (Ti 5 B-wire) were added in the furnace before the casting.
  • each billet were cut, producing three samples for extrusion and two samples for spectrographic analysis (first one sample for spectrographic analysis, then two samples for extrusion, then the second sample for spectrographic analysis (i.e. -in the middle of the billet) and finally the third sample for extrusion).
  • Samples from the as-cast material (-middle of the billet) was etched to reveal feathery crystals, in addition samples were prepared to show grain structure and particle structure. Hardness and conductivity measurements were carried out for each alloy on specimens (2 cm x 2 cm x 1 cm) that were grinded to a grit size of 2000.
  • Fig. 1 a diagram showing for the alloys 1-11 in the Y-axis the electrical conductivity (in MS/m) in function of the total amount of Ti, V and Zr (wt % in X-axis),
  • Fig. 2 a diagram showing for the alloys 1-11 in the Y-axis the main extrusion force (in kN) in function of the total amount of Ti, V and Zr (wt% in X-axis)
  • Fig. 3 a diagram showing for the alloys 1-11 in the Y-axis the yield strength (round dots) and the ultimate tensile strength (square dots) in function of the total amount of Ti, V and Zr (wt% in X-axis).
  • Fig. 4 a diagram showing for the alloys 41-56 in the Y-axis the electrical conductivity (in
  • Fig. 5 a diagram showing for the alloys 41-56 in the Y-axis the break through pressure
  • Fig. 6 a diagram showing for the alloys 41-56 in the Y-axis the breakthrough pressure (in kN) of the alloy after homogenizing at 470°C for 1 hour in function of the total amount of Ti, V and Zr (wt % in X-axis)
  • Fig. 7 a diagram showing for the alloys 41-56 in the Y-axis the yield strenght (in MPa) of the alloy after extrusion in function of the total amount of Ti, V and ZR (wt % in
  • Fig. 8 a diagram showing for the alloys 41-56 in the Y-axis the ultimate tensile strenght
  • Fig. 9 a diagram showing for the alloys 41 -56 in the Y-axis yield strenght (in MPa) of the alloy after extrusion and subsequently homogenizing at 470°C for 1 hour in function of the total amount of Ti, V and ZR (wt % in X-axis), Fig. 10 a diagram showing for the alloys 41-56 in the Y-axis the ultimate tensile strenght
  • Fig. 11 a diagram showing for the alloys 41-56 in the Y-axis the ultimate tensile strenght
  • the as-cast material represents the starting point for the extrusion process and the following mechanical and corrosion testing. An investigation of the starting material has been carried out, and the results are shown in the following. Samples from the as-cast material were investigated to find the actual chemical composition and to reveal the microstructure (grain structure and particle structure) in the various alloys. The chemical composition of the material was obtained by spectrographic analysis, and the results are listed in Table 1 (alloys 1-11), Table 2 (alloys 20-35) and Table 3 (alloys 41-56).
  • the specimens for the SWAAT testing were taken from the first of the four extrusion trials for each alloy. Specimens of 30 cm length were cut from the extruded tubes and then placed in a SWAAT chamber. The results from the SWAAT test are shown Tables 4 and 5.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Extrusion Of Metal (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Chemically Coating (AREA)
  • Air Bags (AREA)
  • Heat Treatment Of Steel (AREA)
  • Prevention Of Electric Corrosion (AREA)
  • Cookers (AREA)
  • Cell Electrode Carriers And Collectors (AREA)

Abstract

L'invention concerne un alliage à base d'aluminium contenant 0,05 à 1,00 % en poids de fer, 0,05 à 0,60 % en poids de silicium, moins de 0,50 % en poids de cuivre, jusqu'à 1,20 % en poids de manganèse, 0,02 à 0,20 % en poids de zirconium, jusqu'à 0,50 % en poids de chrome, 0,02 à 1,00 % en poids de zinc, 0,02 à 0,20 % en poids de titane, 0,02 à 0,20 % en poids de vanadium, jusqu'à 2,00 % en poids de magnésium, jusqu'à 0,10 % en poids d'antimoine, jusqu'à 0,02 % en poids d'impuretés accidentelles et le reste d'aluminium, la quantité totale de Ti plus Cr plus V étant inférieure à 0,3 % en poids et la quantité de V étant inférieure à la quantité de Cr. Ledit alliage à base d'aluminium présente une résistance élevée à la corrosion et une bonne aptitude à l'extrusion.
EP01940521A 2000-05-22 2001-05-21 Alliage d'aluminium inoxydable Withdrawn EP1287175A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01940521A EP1287175A1 (fr) 2000-05-22 2001-05-21 Alliage d'aluminium inoxydable

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP00201808A EP1158063A1 (fr) 2000-05-22 2000-05-22 Alliage d'aluminium présentant une grande résistance à la corrosion
EP00201808 2000-05-22
PCT/EP2001/005920 WO2001090430A1 (fr) 2000-05-22 2001-05-21 Alliage d'aluminium inoxydable
EP01940521A EP1287175A1 (fr) 2000-05-22 2001-05-21 Alliage d'aluminium inoxydable

Publications (1)

Publication Number Publication Date
EP1287175A1 true EP1287175A1 (fr) 2003-03-05

Family

ID=8171530

Family Applications (2)

Application Number Title Priority Date Filing Date
EP00201808A Withdrawn EP1158063A1 (fr) 2000-05-22 2000-05-22 Alliage d'aluminium présentant une grande résistance à la corrosion
EP01940521A Withdrawn EP1287175A1 (fr) 2000-05-22 2001-05-21 Alliage d'aluminium inoxydable

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP00201808A Withdrawn EP1158063A1 (fr) 2000-05-22 2000-05-22 Alliage d'aluminium présentant une grande résistance à la corrosion

Country Status (12)

Country Link
US (1) US20030165397A1 (fr)
EP (2) EP1158063A1 (fr)
JP (1) JP2003534455A (fr)
KR (1) KR20030013427A (fr)
CN (1) CN1443249A (fr)
AU (1) AU2001274064A1 (fr)
BR (1) BR0111053A (fr)
CA (1) CA2409870A1 (fr)
IS (1) IS6629A (fr)
NO (1) NO20025562L (fr)
RU (1) RU2002134484A (fr)
WO (1) WO2001090430A1 (fr)

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CN103526081B (zh) * 2013-10-30 2015-08-05 邹平宏皓工业型材科技有限公司 一种耐腐蚀铝合金
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US11255002B2 (en) 2016-04-29 2022-02-22 Rio Tinto Alcan International Limited Corrosion resistant alloy for extruded and brazed products
KR102570708B1 (ko) * 2017-03-27 2023-08-24 후루카와 덴키 고교 가부시키가이샤 알루미늄 합금재 그리고 이것을 사용한 도전 부재, 도전 부품, 스프링용 부재, 스프링용 부품, 반도체 모듈용 부재, 반도체 모듈용 부품, 구조용 부재 및 구조용 부품
EP3643801A4 (fr) * 2017-06-21 2020-11-11 Obshchestvo S Ogranichennoy Otvetstvennost'yu "Obedinennaya Kompaniya Rusal Inzhenerno-Tekhnologicheskiy Tsentr" Alliage à base d'aluminium
RU2672977C1 (ru) * 2017-11-01 2018-11-21 Федеральное государственное унитарное предприятие "Всероссийский научно-исследовательский институт авиационных материалов" (ФГУП "ВИАМ") АЛЮМИНИЕВЫЙ СПЛАВ СИСТЕМЫ Al-Mg-Si
CN108950329A (zh) * 2018-08-17 2018-12-07 江苏亨通电力特种导线有限公司 一种半软化高铜低锰铝合金材料及其制作工艺
US11939654B2 (en) * 2020-02-17 2024-03-26 Hydro Extruded Solutions As Method for producing a corrosion and high temperature resistant aluminum alloy extrusion material
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CN115052708A (zh) * 2020-02-17 2022-09-13 海德鲁挤压解决方案股份有限公司 高耐腐蚀和耐热铝合金
CN112410620B (zh) * 2020-11-13 2021-09-07 上海华峰铝业股份有限公司 一种高耐腐蚀高延展性铝合金及其制品、制品的制备方法
US20220267884A1 (en) * 2021-02-17 2022-08-25 Northwestern University Ultra-strong aluminum alloys for ambient and high-temperature applications
NO20211429A1 (en) * 2021-11-24 2023-05-25 Norsk Hydro As A 6xxx aluminium alloy with improved properties and a process for manufacturing extruded products
CN114214545B (zh) * 2021-12-14 2022-06-17 江苏鼎胜新能源材料股份有限公司 一种新能源锂电池高耐腐蚀性盖板用铝材料及其制备方法
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RU2002134484A (ru) 2004-06-27
NO20025562D0 (no) 2002-11-20
AU2001274064A1 (en) 2001-12-03
EP1158063A1 (fr) 2001-11-28
NO20025562L (no) 2002-12-20
CN1443249A (zh) 2003-09-17
JP2003534455A (ja) 2003-11-18
BR0111053A (pt) 2003-04-15
WO2001090430A1 (fr) 2001-11-29
IS6629A (is) 2002-11-19
CA2409870A1 (fr) 2001-11-29
US20030165397A1 (en) 2003-09-04

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