FR2690860A1 - Aluminium@ vacuum brazing to silver@ for high mechanical strength - by using aluminium@, silicon@ based brazing alloy, placing in vacuum furnace, evacuating, rapidly heating, cooling and removing assembly, for electrical and electronic industry - Google Patents

Aluminium@ vacuum brazing to silver@ for high mechanical strength - by using aluminium@, silicon@ based brazing alloy, placing in vacuum furnace, evacuating, rapidly heating, cooling and removing assembly, for electrical and electronic industry Download PDF

Info

Publication number
FR2690860A1
FR2690860A1 FR9205761A FR9205761A FR2690860A1 FR 2690860 A1 FR2690860 A1 FR 2690860A1 FR 9205761 A FR9205761 A FR 9205761A FR 9205761 A FR9205761 A FR 9205761A FR 2690860 A1 FR2690860 A1 FR 2690860A1
Authority
FR
France
Prior art keywords
brazing
alloy
assembly
aluminium
vacuum
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
FR9205761A
Other languages
French (fr)
Other versions
FR2690860B1 (en
Inventor
Kucza Jean-Claude
Chollat Henri
Marichy Gerard
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.)
Pechiney Recherche GIE
Original Assignee
Pechiney Recherche GIE
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 Pechiney Recherche GIE filed Critical Pechiney Recherche GIE
Priority to FR9205761A priority Critical patent/FR2690860B1/en
Publication of FR2690860A1 publication Critical patent/FR2690860A1/en
Application granted granted Critical
Publication of FR2690860B1 publication Critical patent/FR2690860B1/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K1/00—Soldering, e.g. brazing, or unsoldering
    • B23K1/008—Soldering within a furnace

Abstract

The brazing comprises (a) placing an Al-Si(-Mg) or Al-Si-Mg-Bi brazing alloy between the two parts to be brazed and applying a light pressure; (b) placing the assembly in a vacuum furnace and evacuating to an absolute pressure of less than 0.001 Torr; (c) rapidly heating to 560-590 deg.C and holding for 1-5 mins.; (d) furnace cooling to 500 deg.C or below, under vacuum or inert gas; and (e) removing the assembly from the furnace. Also new is a brazed assembly of an Al and an Ag (alloy) part, in which the braze metal is an Al-Si(-Mg) or Al-Si-Mg-Bi alloy. The braze metal is pref. an AA 4043, 4045, 4047, 4004 or 4104 alloy of 10-500 microns thickness. The applied pressure is pref. 0.001-1 MPa. The assembly is pref. heated at more than 30 deg.C/min. to the brazing temp., (with a 1-30 mins. intermediate hold at 400 deg.C). Mg is pref. in the braze metal and/or separately as powder, rod, wire or foil in the furnace. USE/ADVANTAGE - The brazing is esp. useful in the electrical and electronics industries and produces brazed joints having high mechanical strength and high electro (and/or thermo) conductivity. C.f. prior art diffusion bonding, the brazing is rapid, compensates for surface irregularities and uses lower pressures. The obtd. joint may support current densities of up to 700 A/sq.cm.

Description

BRASAGE SOUS VIDE ALUMINIUM-ARGENT ET PRODUIT AINSI OBTENU
Cette invention concerne une methode de brasage sous vide de deux éléments, l'un en Al ou un de ses alliages, l'autre en Ag ou un de ses alliages, à l'aide d'un alliage d'apport type Al-Si ainsi que l'assemblage ainsi obtenu.ALUMINUM-SILVER VACUUM BRAZING AND PRODUCT THUS OBTAINED
This invention relates to a method of vacuum brazing of two elements, one in Al or one of its alloys, the other in Ag or one of its alloys, using an Al-Si type filler alloy. as well as the assembly thus obtained.

On sait que l'argent intervient dans le brasage des métaux et alliages comme constituant essentiel du "métal" d'apport; par contre, le brasage
Ag-Al avec métal d'apport ne semble pas connu.We know that silver is involved in the brazing of metals and alloys as an essential constituent of the filler "metal"; on the other hand, soldering
Ag-Al with filler metal does not seem to be known.

Le problème à résoudre est donc la brasure Al-Ag avec "métal" d'apport en particulier en ce qui concerne les liaisons à réaliser dans les industries électrique et électronique. Ces liaisons doivent posséder, à la fois, une bonne resistance mécanique et une bonne conductibilité électrique (et/ou thermique).The problem to be solved is therefore the Al-Ag solder with filler "metal" in particular as regards the connections to be made in the electrical and electronic industries. These connections must have both good mechanical strength and good electrical (and / or thermal) conductivity.

Le procédé selon l'invention consiste à placer entre les deux éléments à assembler un alliage de brasure de la famille des Ai-Si, Ai-Si-Mg ou Ai -Si -Mg-Bi (en particulier les alliages 4043, 4045, 4047, 4004 et 4104, selon les désignations de l'Aluminum Association), ayant une épaisseur comprise entre 10 et 500 pm, à appliquer une pression de l'ordre de 0,001 à 1 MPa, à placer le montage dans l'enceinte d'un four sous vide, à évacuer l'enceinte pour atteindre une pression absolue C 1,33.10 1 Pa (1.10-3 Torr) et à l'y maintenir, à chauffer rapidement, de préférence à une vitesse supérieure à 30 C/min jusqu'à la température de brasage, à maintenir l'assemblage entre 560 et 590 C, durant 1 à 5 min et à laisser refroidir sous vide ou sous gaz neutre jusqu a ce que la pièce ait une température inferieure ou égale à 500 C, avant extraction de l'assemblage.The method according to the invention consists in placing between the two elements to be assembled a brazing alloy of the family of Ai-Si, Ai-Si-Mg or Ai -Si -Mg-Bi (in particular the alloys 4043, 4045, 4047 , 4004 and 4104, according to the designations of the Aluminum Association), having a thickness of between 10 and 500 μm, applying a pressure of the order of 0.001 to 1 MPa, placing the assembly in the enclosure of a vacuum oven, to evacuate the enclosure to reach an absolute pressure C 1.33.10 1 Pa (1.10-3 Torr) and to keep it there, to heat quickly, preferably at a speed higher than 30 C / min until at the brazing temperature, maintain the assembly between 560 and 590 C, for 1 to 5 min and allow to cool under vacuum or neutral gas until the part has a temperature below or equal to 500 C, before extraction of the assembly.

De manière classique en brasage sous vide, l'effet getter est réalise par évaporation de magnésium introduit dans le métal d'apport et/ou séparément au moyen de poudre, barreau, fil, plaquettes, placés dans le four.Conventionally in vacuum brazing, the getter effect is achieved by evaporation of magnesium introduced into the filler metal and / or separately by means of powder, bar, wire, plates, placed in the oven.

De maniere préférentielle, au cours de la montée en température, on ménage un palier de 1 à 30 min à 400"C environ, qui dépend de la géométrie des pièces à assembler. Preferably, during the temperature rise, a level of 1 to 30 min at approximately 400 ° C. is maintained, which depends on the geometry of the parts to be assembled.

L'invention sera mieux comprise à l'aide de l'exemple suivant.The invention will be better understood using the following example.

EXEMPLE 1
Un alliage d'Al 3003 de 2 mm d'épaisseur, a été assemblé à de l'Ag sous forme d'une bande de 2 mm d'epaisseur avec interposition d'un alliage 4104 de 50 #m d'épaisseur.EXAMPLE 1
A 2 mm thick Al 3003 alloy was assembled with Ag in the form of a 2 mm thick strip with the interposition of a 4104 alloy 50 μm thick.

Ces éléments ont été prealablement polis au papier métallographique 600 et dégraissés à l'acétone. These elements were previously polished with metallographic paper 600 and degreased with acetone.

Ils ont ete mis en contact avec une légère pression (0,05 MPa) et ont subi le cycle de brasage suivant sous une pression de 0,5.10 4 Torr
(0,665.10 2 Pa)
20"C 40"C/min 400 C, maintien 10 min 40"C/min 570 C,
maintien 2 min, reft sous vide --- > 100"C
La liaison obtenue est représentée en coupe macrographique (x 20) à la fig. 1 et en coupe micrographique (x 200) à la fig. 2.They were brought into contact with a slight pressure (0.05 MPa) and underwent the following brazing cycle under a pressure of 0.5.10 4 Torr
(0.665.10 2 Pa)
20 "C 40" C / min 400 C, hold 10 min 40 "C / min 570 C,
hold 2 min, vacuum reft ---> 100 "C
The connection obtained is shown in macrographic section (x 20) in FIG. 1 and in micrographic section (x 200) in fig. 2.

On remarque une bonne liaison metallurgique entre les 2 composants.We notice a good metallurgical bond between the 2 components.

Ce procédé offre par rapport au soudage par diffusion les avantages suivants - l'interface liquide compense les irrégularités eventuelles des surfaces
à assembler - les pressions d'accostage sont plus faibles - les temps de brasage sont courts, voire même très courts.This process offers the following advantages over diffusion welding - the liquid interface compensates for any surface irregularities
to be assembled - docking pressures are lower - brazing times are short, even very short.

De plus, il a été vérifié qu'en ce qui concerne les applications électriques, la liaison ainsi formée supporte des densités de courant très élevées, pouvant aller jusqu'à 700 A/cm2 In addition, it has been verified that with regard to electrical applications, the bond thus formed withstands very high current densities, up to 700 A / cm2

Claims (1)

REVENDICATIONS 1. Procédé de brasure sous vide de l'Al ou ses alliages et de l'Ag ou ses alliages, caractérisé en ce que a) on place entre les 2 éléments à assembler un alliage de brasure Al-Si, Al-Si-Mg et Al-Si-Mg-Bi. b) on applique une légère pressionCLAIMS 1. Process for vacuum brazing of Al or its alloys and Ag or its alloys, characterized in that a) an Al-Si, Al-Si- brazing alloy is placed between the 2 elements to be assembled Mg and Al-Si-Mg-Bi. b) light pressure is applied c) on place l'ensemble dans l'enceinte d'un four à vide c) the assembly is placed in the enclosure of a vacuum oven d) on évacue l'enceinte jusqu'à une pression absolue inférieure à Torr 3 Torr (1,33.10 I Pa) et on l'y maintient  d) the enclosure is evacuated to an absolute pressure below Torr 3 Torr (1.33.10 I Pa) and is maintained there e) on élève rapidement la température jusqu'à 560"C-590"C, laquelle est e) the temperature is rapidly raised to 560 "C-590" C, which is maintenue entre 1 et 5 min maintained between 1 and 5 min f) on laisse refroidir l'assemblage dans l'enceinte sous vide ou sous f) the assembly is allowed to cool in the vacuum chamber or under gaz neutre jusqu'à une température z 5000C neutral gas up to temperature z 5000C g) on sort l'assemblage de l'enceinte. g) the assembly is removed from the enclosure. 2. Procédé selon la revendication 1 caractérisé en ce que la vitesse de2. Method according to claim 1 characterized in that the speed of montée en température de l'étape e) est supérieure à 30"C/min.  temperature rise in step e) is greater than 30 "C / min. 3. Procedé selon l'une des revendications 1 ou 2 caractérisé en ce qu au3. Method according to one of claims 1 or 2 characterized in that at cours de la montée en température e), on effectue un palier de 1 à during the rise in temperature e), a step is carried out from 1 to 30 min à 400"C env. 30 min at 400 "C approx. 4. Procédé selon l'une quelconque des revendications 1 à 3 caractérisé en4. Method according to any one of claims 1 to 3 characterized in ce que l'épaisseur de l'alliage de brasure Al-Si est comprise entre 10 that the thickness of the Al-Si brazing alloy is between 10 et 500 rm.  and 500 rm. 5. Procédé selon l'une des revendications 1 à 4 caractérisé en ce que la5. Method according to one of claims 1 to 4 characterized in that the pression à l'étape b) est maintenue entre 0,001 et 1 MPa. pressure in step b) is maintained between 0.001 and 1 MPa. 6. Procédé selon l'une des revendications 1 à 4 caractérisé en ce que6. Method according to one of claims 1 to 4 characterized in that l'alliage de brasure est le 4104. the brazing alloy is 4104. 7. Assemblage brasé constitué d'un élément Al ou de ses alliages et d'un7. Brazed assembly consisting of an Al element or its alloys and a élément Ag ou un de ses alliages caractérisé en ce que le "métal" element Ag or one of its alloys characterized in that the "metal" d'apport est un alliage Al-Si, Al-Si-Mg ou Al-Si-Mg-Bi.  filler is an Al-Si, Al-Si-Mg or Al-Si-Mg-Bi alloy.
FR9205761A 1992-05-06 1992-05-06 ALUMINUM-SILVER VACUUM BRAZING AND THE PRODUCT OBTAINED THEREBY. Expired - Fee Related FR2690860B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9205761A FR2690860B1 (en) 1992-05-06 1992-05-06 ALUMINUM-SILVER VACUUM BRAZING AND THE PRODUCT OBTAINED THEREBY.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9205761A FR2690860B1 (en) 1992-05-06 1992-05-06 ALUMINUM-SILVER VACUUM BRAZING AND THE PRODUCT OBTAINED THEREBY.

Publications (2)

Publication Number Publication Date
FR2690860A1 true FR2690860A1 (en) 1993-11-12
FR2690860B1 FR2690860B1 (en) 1994-06-17

Family

ID=9429719

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9205761A Expired - Fee Related FR2690860B1 (en) 1992-05-06 1992-05-06 ALUMINUM-SILVER VACUUM BRAZING AND THE PRODUCT OBTAINED THEREBY.

Country Status (1)

Country Link
FR (1) FR2690860B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2818579A1 (en) * 2000-12-22 2002-06-28 Lorraine Carbone METHOD FOR MANUFACTURING A PLATED PRODUCT COMPRISING A STEEL SUPPORT PART AND AN ANTI-CORROSION METAL COATING
US6800150B2 (en) 2002-04-29 2004-10-05 Le Carbone Lorraine Manufacturing process for an element of a chemical device comprising a support part in metal and an anticorrosion metallic coating
EP1224050B1 (en) * 1999-10-25 2005-05-04 Metglas, Inc. Process for manufacturing of brazed multi-channeled structures

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2054857A5 (en) * 1969-07-29 1971-05-07 Martin Marietta Corp Vacuum-furnace hard-soldering of alumin- - ium or aluminium alloy components
GB2059843A (en) * 1979-10-09 1981-04-29 Tri Delta Ind Inc Method of metallurgically joining metals respectively of relatively high and low melting points
EP0241125A1 (en) * 1986-03-18 1987-10-14 KAISER ALUMINUM & CHEMICAL CORPORATION Thermal treatment of brazed products for improved corrosion resistance

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2054857A5 (en) * 1969-07-29 1971-05-07 Martin Marietta Corp Vacuum-furnace hard-soldering of alumin- - ium or aluminium alloy components
GB2059843A (en) * 1979-10-09 1981-04-29 Tri Delta Ind Inc Method of metallurgically joining metals respectively of relatively high and low melting points
EP0241125A1 (en) * 1986-03-18 1987-10-14 KAISER ALUMINUM & CHEMICAL CORPORATION Thermal treatment of brazed products for improved corrosion resistance

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1224050B1 (en) * 1999-10-25 2005-05-04 Metglas, Inc. Process for manufacturing of brazed multi-channeled structures
FR2818579A1 (en) * 2000-12-22 2002-06-28 Lorraine Carbone METHOD FOR MANUFACTURING A PLATED PRODUCT COMPRISING A STEEL SUPPORT PART AND AN ANTI-CORROSION METAL COATING
WO2002051576A1 (en) * 2000-12-22 2002-07-04 Le Carbone Lorraine Method for making a plated product comprising a steel support component and an anti-corrosive metal coating
US6702177B2 (en) 2000-12-22 2004-03-09 Le Carbone Lorraine Manufacturing process for a plated product comprising a support part in steel and an anticorrosion metallic coating
US6800150B2 (en) 2002-04-29 2004-10-05 Le Carbone Lorraine Manufacturing process for an element of a chemical device comprising a support part in metal and an anticorrosion metallic coating

Also Published As

Publication number Publication date
FR2690860B1 (en) 1994-06-17

Similar Documents

Publication Publication Date Title
US3482305A (en) Method of bonding aluminum
KR100764269B1 (en) Method for forming sputter target assemblies
CA2432650C (en) Method for making a plated product comprising a steel support component and an anti-corrosive metal coating
CN107662045A (en) The manufacture method of alloy product
EP0296942B1 (en) Process for furnace brazing of two workpieces in a rarefied or controlled atmosphere
EP0002419B1 (en) Process for bonding workpieces of aluminium-base alloys and steel
CN110608931A (en) High-flux preparation method for preparing metal diffusion couples with large melting point difference
KR101261078B1 (en) Method for forming a tight-fitting silver surface on an aluminium piece
FR2690860A1 (en) Aluminium@ vacuum brazing to silver@ for high mechanical strength - by using aluminium@, silicon@ based brazing alloy, placing in vacuum furnace, evacuating, rapidly heating, cooling and removing assembly, for electrical and electronic industry
CN114453693A (en) Contact reaction brazing process for connecting TZM alloy and graphite by pure zirconium layer
EP2170136B1 (en) Cooking utensil made from cast aluminium compatible with induction heating and method for production
CN107297554B (en) A method of high-volume fractional SiCp/Al composite material is connected based on nano-multilayer film self- propagating
JPH07330455A (en) Method for joining ceramic material and metallic material
JP4986843B2 (en) Electronic component package, its lid, lid for the lid, and method for manufacturing the lid
US3628233A (en) Method for the low-temperature joining of carbides
RU2074797C1 (en) Method of welding zirconium to structural metal
FR2556070A1 (en) Method for manufacturing a mechanical sealing gasket for a rotary machine
WO2022262297A1 (en) Method for manufacturing x-ray tube anode target material
RU2098243C1 (en) Method of contact-reaction soldering of copper-steel structures
FR2518440A1 (en) PROCESS FOR SOLDING COPPER ON COPPER OR ON STEEL ALLOYS
KR101152979B1 (en) Method of binding bertween electric contact and solder
FR2810395A1 (en) Heat dissipator for electronic tubes has sealed metal jacket enclosing metal matrix with diamond particles
KR820000650B1 (en) Process for assembling aluminiumbased members and steels members
CN115302207A (en) Manufacturing method of composite base and composite base
RU2109606C1 (en) Method of making soldered telescopic structures

Legal Events

Date Code Title Description
ST Notification of lapse
ST Notification of lapse