EP0059742A1 - Verfahren zur herstellung einer hartlötbaren aluminiumlegierung. - Google Patents

Verfahren zur herstellung einer hartlötbaren aluminiumlegierung.

Info

Publication number
EP0059742A1
EP0059742A1 EP81902622A EP81902622A EP0059742A1 EP 0059742 A1 EP0059742 A1 EP 0059742A1 EP 81902622 A EP81902622 A EP 81902622A EP 81902622 A EP81902622 A EP 81902622A EP 0059742 A1 EP0059742 A1 EP 0059742A1
Authority
EP
European Patent Office
Prior art keywords
brazing
alloy
alpha
hours
stages
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
EP81902622A
Other languages
English (en)
French (fr)
Other versions
EP0059742B1 (de
Inventor
Jea Coupry
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.)
Cegedur Societe de Transformation de lAluminium Pechiney SA
Original Assignee
Cegedur Societe de Transformation de lAluminium Pechiney SA
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=9245945&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0059742(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Cegedur Societe de Transformation de lAluminium Pechiney SA filed Critical Cegedur Societe de Transformation de lAluminium Pechiney SA
Priority to AT81902622T priority Critical patent/ATE7406T1/de
Publication of EP0059742A1 publication Critical patent/EP0059742A1/de
Application granted granted Critical
Publication of EP0059742B1 publication Critical patent/EP0059742B1/de
Expired 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

Definitions

  • the invention relates to alloys based on aluminum, which can be brazed, in particular for the manufacture of large devices.
  • alloy 3003 the alloy most suitable for the manufacture of large brazed devices, such as heat exchangers, is alloy 3003, according to the AFNOR NF A 50-541 standard.
  • the duration of the cycle imposed, on the one hand, by the own mass of such devices, on the other hand, by the need to limit the heating and cooling rates to a low value (of the order of a few tens of ° C / hour) to avoid internal stresses of thermal origin and corresponding distortions.
  • brazing time itself (partially or completely liquid brazing) being generally between a few tens of minutes to several hours, the alloy must sufficiently resist creep.
  • the aim of the present invention is therefore to find an alloy based on Al which is brazable and "refractory", that is to say retaining a large fraction of its mechanical characteristics during and after long-term brazing, without alteration. notable for its other properties of use, such as its resistance to corrosion.
  • the alloy according to the invention which meets these requirements, has the following composition (by weight%): Fe 0.10 to 0.7
  • Cu + Mg is greater than or equal to 0.40%.
  • a preferred composition is as follows:
  • V ⁇ 0.4 remains aluminum and usual impurities.
  • the alloy according to the invention has its characteristics of use tion, in particular the best resistance to dissolution by brazing, if between the casting and the subsequent hot deformation, it undergoes a homogenization cycle in two stages: a) the first, by keeping in the field 590-610 ° C for 2 to 36 hours; b) the second, by maintaining between 450 and 550o C between 30 minutes and 24 hours; these two stages being separated or not by a return to ambient temperature (continuous or discontinuous cooling).
  • the simplest and most economical method naturally consists of slow and controlled cooling between the two stages a) and b).
  • the alloy can be used in the form of a homogeneous product to which either the brazing is applied during the actual brazing, or which is brought into contact with another product coated with a brazing alloy, or either of composite product, coated with a brazing alloy, obtained, for example, by hot and / or cold co-laminating (sheets or strips plated on one or two sides).
  • the alloy is brazing, it can also find applications in all cases where the material is brought temporarily to high temperature, such as kitchen utensils, solar collectors, muffler casings, etc.
  • EXAMPLE 1 Three products are produced plated in three layers, each composed of a core alloy and a brazing alloy placed on either side of the core alloy with the thickness per side equal to 5. % of the total thickness.
  • compositions are obtained (% by weight):
  • Product I is an alloy 3003 plated with solder alloy 4343.
  • Products 2 and 3 have a core whose composition is in accordance with the invention; they are also plated with 4343 alloy.
  • the brazing alloys are cast by one. known process (semi-continuous casting) and hot rolled after reheating at 500 ° C to a thickness compatible with the thickness of the plated products.
  • the core alloys are also cast in plates (semi-continuous casting).
  • a homogenization heat treatment is then carried out with maintenance of 20 h at 600 ° C., followed by cooling to 500 ° C. (20 ° C. / h).
  • the clad strip thus obtained is then cold rolled and the composite sheets thus obtained are then annealed to the final thickness.
  • Brazing is carried out in a flow bath after preheating the products for several hours at a temperature slightly below 570o C. Immersion in the salt bath brought to 600 ° C has a duration of two hours.
  • Cooling after brazing is 30 ° C per hour.
  • the depth of dissolution in the three cases examined does not exceed 20 microns.
  • the same core alloys are used.
  • the solder used has the same composition as that of Example 1, but with the addition of 0.3% copper.
  • the plated products are obtained by the same processing technique as that described in Example 1, with the only difference being a plating thickness per side of 15% of the total thickness obtained.
  • a plated composite is produced (plating thickness per side being 10% of the total thickness) of the following composition (% by weight)
  • the transformation of the plated products is carried out in the same way as in Example 1, except with regard to the homogenization supplemented by maintaining for 20 h at 500 ° C.
  • the brazing cycle includes heating under vacuum from 1.33 to 13.3 MPa at a temperature of 560o C, so as to homogenize the temperature of the assembly to be brazed, then a two hour hold in the interval brazing temperature (580-590o C), so as to ensure that the solder passes through the liquid state, always under vacuum.
  • the cooling is then carried out in the brazing furnace, then in air, with a cooling rate sufficiently slow to ensure the thermal equilibrium within the device.
  • the dissolution depth when maintained at the brazing temperature, remains less than 30 microns.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Coating With Molten Metal (AREA)
  • Laminated Bodies (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP81902622A 1980-09-11 1981-09-09 Verfahren zur herstellung einer hartlötbaren aluminiumlegierung Expired EP0059742B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81902622T ATE7406T1 (de) 1980-09-11 1981-09-09 Verfahren zur herstellung einer hartloetbaren aluminiumlegierung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8019876 1980-09-11
FR8019876A FR2489845B1 (fr) 1980-09-11 1980-09-11 Alliage d'aluminium brasable et son procede de fabrication

Publications (2)

Publication Number Publication Date
EP0059742A1 true EP0059742A1 (de) 1982-09-15
EP0059742B1 EP0059742B1 (de) 1984-05-09

Family

ID=9245945

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81902622A Expired EP0059742B1 (de) 1980-09-11 1981-09-09 Verfahren zur herstellung einer hartlötbaren aluminiumlegierung

Country Status (9)

Country Link
EP (1) EP0059742B1 (de)
JP (1) JPS6050867B2 (de)
BE (1) BE890261A (de)
CA (1) CA1158074A (de)
DE (1) DE3163515D1 (de)
ES (1) ES8206652A1 (de)
FR (1) FR2489845B1 (de)
IT (1) IT1139424B (de)
WO (1) WO1982001014A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2614901B1 (fr) * 1987-05-05 1992-07-24 Cegedur Alliages d'aluminium pour echangeur de chaleur brase
DE69531229T2 (de) * 1994-12-19 2004-06-03 Corus Aluminium Walzprodukte Gmbh Hartlotfolie
EP1165851A1 (de) * 1999-03-01 2002-01-02 Alcan International Limited Aluminium-blech herstllungsverfahren
DE10049315A1 (de) * 1999-10-25 2001-04-26 Solvay Fluor & Derivate Flußmittel für die Trockenapplikation
US6756133B2 (en) 2001-03-02 2004-06-29 Pechiney Rolled Products Llc High temperature aluminum alloy brazing sheet and methods of manufacturing and uses therefor
FR2862984B1 (fr) * 2003-11-28 2006-11-03 Pechiney Rhenalu Bande en alliage d'aluminium pour brasage
US20090266530A1 (en) 2008-04-24 2009-10-29 Nicholas Charles Parson Aluminum Alloy For Extrusion And Drawing Processes

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB498227A (en) * 1937-06-04 1939-01-04 Hubert Sutton Improvements in or relating to aluminium alloys
GB572672A (en) * 1941-08-21 1945-10-18 Tennyson Fraser Bradbury Heat treatment of multiple aluminium alloys
GB614898A (en) * 1946-08-13 1948-12-23 Robert Martin Bradbury A new aluminium base alloy
GB1310495A (en) * 1969-03-07 1973-03-21 Pavelle Ltd Production of photographic colour prints
US3714442A (en) * 1971-06-04 1973-01-30 Eastman Kodak Co Exposure control circuitry
US4175855A (en) * 1974-04-04 1979-11-27 Terminal Data Corporation Electronic exposure control
NO144270C (no) * 1975-06-30 1981-07-29 Metallgesellschaft Ag Anvendelse av en aluminium-knalegering som material til fremstilling av deler, som ved siden av god formbarhet og korrosjonsbestandighet maa ha en rekrystallisasjonsterskel som ligger over 400 grader c
ZA775612B (en) * 1977-09-20 1979-08-29 D Vermeulen Improvements in photographic enlarging exposure meters
CH640273A5 (en) * 1978-02-24 1983-12-30 Alusuisse Corrosion-resistant aluminium alloy

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8201014A1 *

Also Published As

Publication number Publication date
FR2489845B1 (fr) 1986-06-06
FR2489845A1 (fr) 1982-03-12
ES505369A0 (es) 1982-08-16
IT8123796A0 (it) 1981-09-04
CA1158074A (fr) 1983-12-06
BE890261A (fr) 1982-03-08
DE3163515D1 (en) 1984-06-14
JPS6050867B2 (ja) 1985-11-11
JPS57501385A (de) 1982-08-05
WO1982001014A1 (en) 1982-04-01
EP0059742B1 (de) 1984-05-09
IT1139424B (it) 1986-09-24
ES8206652A1 (es) 1982-08-16

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