CA1051693A - Process and alloy for brazing aluminum-containing articles - Google Patents
Process and alloy for brazing aluminum-containing articlesInfo
- Publication number
- CA1051693A CA1051693A CA204,512A CA204512A CA1051693A CA 1051693 A CA1051693 A CA 1051693A CA 204512 A CA204512 A CA 204512A CA 1051693 A CA1051693 A CA 1051693A
- Authority
- CA
- Canada
- Prior art keywords
- percent
- weight
- brazing
- alloy
- aluminum
- 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
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
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/28—Selection of soldering or welding materials proper with the principal constituent melting at less than 950 degrees C
- B23K35/286—Al as the principal constituent
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Ceramic Products (AREA)
Abstract
PROCESS AND ALLOY FOR BRAZING
ALUMINUM-CONTAINING ARTICLES
ABSTRACT OF THE DISCLOSURE
An aluminum-silicon base brazing alloy contains between 4 and 20 percent by weight of silicon and between 0.0001 and 1.0 percent by weight, preferably between 0.005 and 0.1 percent by weight, of at least one of the elements sodium, potassium and lith-ium. Optionally,the brazing alloy may further include between 0.01 and 10 percent by weight, preferably between 0.05 and 2 percent by weight, of at least one of the elements bismuth, strontium, bar-ium and antimony as well as between 0.00001 and 1.0 percent by weight, preferably between 0.0002 and 0.1 percent by weight of ber-yllium. The remainder of the alloy consists essentially of aluminum and impurities conditioned by production of the brazing alloy. The alloy is used for the fluxless brazing of aluminum-containing articles in substantially non-oxidizing atmospheres. The elements sodium, potassium and lithium make it possible to relax the require-ments imposed on the brazing atmosphere from those imposed when using similar brazing alloys which, however, do not contain the last-mentioned elements.
ALUMINUM-CONTAINING ARTICLES
ABSTRACT OF THE DISCLOSURE
An aluminum-silicon base brazing alloy contains between 4 and 20 percent by weight of silicon and between 0.0001 and 1.0 percent by weight, preferably between 0.005 and 0.1 percent by weight, of at least one of the elements sodium, potassium and lith-ium. Optionally,the brazing alloy may further include between 0.01 and 10 percent by weight, preferably between 0.05 and 2 percent by weight, of at least one of the elements bismuth, strontium, bar-ium and antimony as well as between 0.00001 and 1.0 percent by weight, preferably between 0.0002 and 0.1 percent by weight of ber-yllium. The remainder of the alloy consists essentially of aluminum and impurities conditioned by production of the brazing alloy. The alloy is used for the fluxless brazing of aluminum-containing articles in substantially non-oxidizing atmospheres. The elements sodium, potassium and lithium make it possible to relax the require-ments imposed on the brazing atmosphere from those imposed when using similar brazing alloys which, however, do not contain the last-mentioned elements.
Description
~5~L693 The invention relates generally to the brazing of articles containing aluminum.
The German Auslegeschrift 1,962,760 discloses a brazing alloy consisting of 4 to 20 percent by weight of silicon and 0.01 to 10 percent by weight, preferably 0.05 to 2 percent by weight, of the elements of the group composed of bismuth, strontium, barium and anti-mony with the remainder consisting oE aluminum and impurities due to the production of the alloy. This publication teaches the use of the brazing alloy as a filler metal for the fluxless brazing of alum-inum-containing articles in a non-oxidizing atmosphere or in a low vacuum.
The German Offenlegungsschrift 2,143,965.6 also discloses a brazing alloy for the fluxless brazing of aluminum-containing ar~
ticles which likewise consists of 4 to 20 percent by weight of silicon and 0.01 to 10 percent by weight, preferably 0.05 to 2 percent by weight, of the elements of the group composed of bismuthl strontium, barium and antimony with the remainder consisting essentially of a-luminum and impurities due to the production of the alloy. The char-acteristic of this alloy resides in the fact that, instead of or together with the bismuth, strontium, barium and antimony, it contains -beryllium in amounts of 0.00001 to 1.0 percent bysweight and, prefer-ably, in amounts of 0.0002 to 0.1 percent by weight.
The foregoing brazing alloys have been found to yield good results in practice. However, they possess the disadvantage that they impose relatively stringent requirements as regards the presence of a non-oxidizing atmosphere or a low vacuum during the brazing operation.
A general object of the invention is, therefore, to provide a novel process and a novel brazing alloy for the brazing of aluminum-containing articles.
A further object of the invention is to provide a process and brazing alloy which enable aluminum-containing articles to be
The German Auslegeschrift 1,962,760 discloses a brazing alloy consisting of 4 to 20 percent by weight of silicon and 0.01 to 10 percent by weight, preferably 0.05 to 2 percent by weight, of the elements of the group composed of bismuth, strontium, barium and anti-mony with the remainder consisting oE aluminum and impurities due to the production of the alloy. This publication teaches the use of the brazing alloy as a filler metal for the fluxless brazing of alum-inum-containing articles in a non-oxidizing atmosphere or in a low vacuum.
The German Offenlegungsschrift 2,143,965.6 also discloses a brazing alloy for the fluxless brazing of aluminum-containing ar~
ticles which likewise consists of 4 to 20 percent by weight of silicon and 0.01 to 10 percent by weight, preferably 0.05 to 2 percent by weight, of the elements of the group composed of bismuthl strontium, barium and antimony with the remainder consisting essentially of a-luminum and impurities due to the production of the alloy. The char-acteristic of this alloy resides in the fact that, instead of or together with the bismuth, strontium, barium and antimony, it contains -beryllium in amounts of 0.00001 to 1.0 percent bysweight and, prefer-ably, in amounts of 0.0002 to 0.1 percent by weight.
The foregoing brazing alloys have been found to yield good results in practice. However, they possess the disadvantage that they impose relatively stringent requirements as regards the presence of a non-oxidizing atmosphere or a low vacuum during the brazing operation.
A general object of the invention is, therefore, to provide a novel process and a novel brazing alloy for the brazing of aluminum-containing articles.
A further object of the invention is to provide a process and brazing alloy which enable aluminum-containing articles to be
-2-i1693 1 brazed more economically than was possible heretofore.
Another object of the invention is to provide a process and brazing alloy which enable aluminum-containing articles to be brazed in a simpler manner than was possible until now.
An additional ob~ect of the invention is to provide a process and brazing alloy for brazing aluminum-containing articles which enable higher quality ~oints to be achieved than was possible heretofore.
It is also an object of the invention to provide a pro-cess and brazing alloy for brazing in a non-oxidizing atmosphere or in a low vacuum which enable the requirements imposed on the bra-zing atmosphere by the conventional brazing alloys to be lessened.
In accordance with the foregoing objects and others which will become apparent, the invention provides, as one of its features, in a process of brazing aluminum-containing articles, for the step of brazing the articles with an aluminum-silicon base brazing alloy which includes at least one substance selected from the group con-sisting of sodium, potassium and lithium. This permits a relaxation of the requirements imposed on the brazing atmosphere from those im- ;
posed when using similar brazing alloys which are free of sodium, potassium and/or lithium.
The brazing alloy according to the invention may include about 4 to 20 percent by weight of silicon, about 0.01 to 10 percent by weight, preferably 0.05 to 2 percent by weight, of at least one of the elements selected from the group composed of bismuth, stron-tium, barium and antimony and O.OOOOl ~to 1.0 percent by weight, pre- -ferably 0.0002 to 0.1 percent by weight, of beryllium with the balance of the alloy being essentially aluminum. It is also possible for at least one of the elements bismuth, strontium, barium and antimony to be present without beryllium or, conversely, for '~.
Another object of the invention is to provide a process and brazing alloy which enable aluminum-containing articles to be brazed in a simpler manner than was possible until now.
An additional ob~ect of the invention is to provide a process and brazing alloy for brazing aluminum-containing articles which enable higher quality ~oints to be achieved than was possible heretofore.
It is also an object of the invention to provide a pro-cess and brazing alloy for brazing in a non-oxidizing atmosphere or in a low vacuum which enable the requirements imposed on the bra-zing atmosphere by the conventional brazing alloys to be lessened.
In accordance with the foregoing objects and others which will become apparent, the invention provides, as one of its features, in a process of brazing aluminum-containing articles, for the step of brazing the articles with an aluminum-silicon base brazing alloy which includes at least one substance selected from the group con-sisting of sodium, potassium and lithium. This permits a relaxation of the requirements imposed on the brazing atmosphere from those im- ;
posed when using similar brazing alloys which are free of sodium, potassium and/or lithium.
The brazing alloy according to the invention may include about 4 to 20 percent by weight of silicon, about 0.01 to 10 percent by weight, preferably 0.05 to 2 percent by weight, of at least one of the elements selected from the group composed of bismuth, stron-tium, barium and antimony and O.OOOOl ~to 1.0 percent by weight, pre- -ferably 0.0002 to 0.1 percent by weight, of beryllium with the balance of the alloy being essentially aluminum. It is also possible for at least one of the elements bismuth, strontium, barium and antimony to be present without beryllium or, conversely, for '~.
-3- ;
~5~6~33 beryllium to be present without any ~f the elements bismuth, strontium, barium and antimony being present.
One of the important features of the invention resides in the presence of at least one of the elements sodium, potassium and lithium. The elements sodium, potassium and/or lithium may be pre-sent alone, that is, without the elements of the group composed of bismuth, strontium; barium, antimony and beryllium being present.
Advantageously, however, the elements sodium, potassium and/or li-thium are present together with one or more of the elements bismuth, strontium, barium, antimony and beryllium. The brazing alloy in accordance with the invention may contain about 0.0001 to 1.0 per-cent by weight of at least one of the elements selected ~rom the group consisting of sodium, potassium and lithium. Preferably, the brazing alloy contains about 0.005 to 0.1 percent by weight of at least one of the elements of the group composed of sodium, potas-sium and lithium.
The remainder of the brazing alloy may consist entirely or predominantly of aluminum and impurities conditioned by the pro-duction of the brazing alloy, that is conventional impurities.
According to the invention, the brazing alloy may be used for the fluxless brazing of aluminum-containing articles in a non-oxidiz~ggatmosphere or in a low vacuum. A non-oxidizing atmosphsre may be provided by blanketing the region of joining with a suit-able protective gasu For instance, an inert gas such as argon may be used for this purpose. It is also possible to use other gases such as, for example, nitrogen and ammonia.
Research has shown that, when using the brazing alloy in accordance with the invention, it is no longer necessary to impose such stringent requirements on the oxygen content of the brazing ' l~S1693 atmosphere or on the degree of the vacuum used for brazing as were required heretofore. Simultaneously, the results achieved when us-ing the invention are identical to or better than those achievable in accordance with the earlier-mentioned German publications.
The addition of alkali metals as according to the inven-tion has been found to provide esp~cially favorable effects as re-gards the corrosion-resistance of the brazed joint and, in particu-lar, under those conditions where moisture has access to the joint.
This is particularly true in those instances where, aside from one or more alkali metals, the brazing alloy additionally includes beryllium.
If the corrosion-resistance is denoted with values from O to 5 with the value O representing the ideal condition or, in other words, a condition which is practically inachievable, that is, with the value O representing the bo.st corrosion-resistance and the value 5 representing the poorest corrosion-resistance, then the following values may be assigned to the test samples which were run:
the samples with additions of beryllium and alkali metal, l; test samples without beryllium but with alkali metal, 2; and test samples with neither beryllium nor alkali metal, 3.
It has been found advantageous when the tota~ ~uantity of the alloying elements bismuth, strontium, barium, antimony, beryl-ium and sodium in the brazing alloy is at most about 10 percent by weight.
The appended Table sets ~orth several examples of brazing alloys according to the invention. It is sel~-understood that the compositions given are merel- exemplary and are not intended to limit the invention. The values in the Table are in terms of weight percent and in all cases the remainder is essentially aluminum.
.~ -5-t o o o o .
o o o o o o o o o o o - ~ o o o o o o o o o o o \J 0 t~` l I` ~ ~`I N _1 ~ N O
_l ~) O O ~ O O r~ O O
a~ o o oo o o o o , ~ ~ ., ~ D .
ON O O ~1O O O O
~1. .
,0~ 0 0 0 O. O O O
V . .' N N e~ D O O .
~1 0 0 ~`1 0 0 0 ' O O
.1 a~ .... . IIIIII
N O O O O O O O O .
~ t,. .:
N O O O O O ~1 O . :;
~O 1~ 0 0 0 0 0 0 1 11 1 1 0 1 1 :' ,. ~ \I CQ u~ . ' ~
~ u a) ~ ~ O ~ ~
~ 1~oo~rooo~) IIoIIo ~... .
C~l O O O O O O O O O ~ : t V . ~ ;' i~ U~ O ~ .
u~ r o o , ~D ~ O O ~ ' O O O ~ O ~ ~ O ., ,,:
:11 . . ~ .
` ¢11 1~ 1~ . .
'~ ,¢1 ~ ~ 'I o . :
l C~ o o o o' o' o~ 1 O I I I ~. .'. `.', ~D ,n . :
. ~ ~ o ~D. o o o o I I ~ . I I t ; ., O O O O G O O O O . ~ ~
~.' . l ~`' . G~ 1 , ~
. ~ O O ~ O O O I ~ ~ ~ O ~ ~ ~ , ,.
O O O O O 0 0: 0 ' d' ~r U~l (`7 r-l O N ~) .
a~ o o ~ o o ~-1 ~1 o I~ o o o o o o o o .
, . ~''., O
o o ~ o o o -~
. ~ o O O O~ 0 0 1 1 1 1 _ I '~':
. .;. l . .. ; ~:' 8 ~a ~ c o ~ F c ~ ,1 .
~ C ~ oi ~ h ~ ~ S.l ...
. 'U~ 'N 'a~ ~ al .
,"6- 'a(3S1~3 .. . .. . ..... .. .
... ~. .
~' ., .: ,, . :
. ~ . ~ . . . .
.. ..
~5~6~33 beryllium to be present without any ~f the elements bismuth, strontium, barium and antimony being present.
One of the important features of the invention resides in the presence of at least one of the elements sodium, potassium and lithium. The elements sodium, potassium and/or lithium may be pre-sent alone, that is, without the elements of the group composed of bismuth, strontium; barium, antimony and beryllium being present.
Advantageously, however, the elements sodium, potassium and/or li-thium are present together with one or more of the elements bismuth, strontium, barium, antimony and beryllium. The brazing alloy in accordance with the invention may contain about 0.0001 to 1.0 per-cent by weight of at least one of the elements selected ~rom the group consisting of sodium, potassium and lithium. Preferably, the brazing alloy contains about 0.005 to 0.1 percent by weight of at least one of the elements of the group composed of sodium, potas-sium and lithium.
The remainder of the brazing alloy may consist entirely or predominantly of aluminum and impurities conditioned by the pro-duction of the brazing alloy, that is conventional impurities.
According to the invention, the brazing alloy may be used for the fluxless brazing of aluminum-containing articles in a non-oxidiz~ggatmosphere or in a low vacuum. A non-oxidizing atmosphsre may be provided by blanketing the region of joining with a suit-able protective gasu For instance, an inert gas such as argon may be used for this purpose. It is also possible to use other gases such as, for example, nitrogen and ammonia.
Research has shown that, when using the brazing alloy in accordance with the invention, it is no longer necessary to impose such stringent requirements on the oxygen content of the brazing ' l~S1693 atmosphere or on the degree of the vacuum used for brazing as were required heretofore. Simultaneously, the results achieved when us-ing the invention are identical to or better than those achievable in accordance with the earlier-mentioned German publications.
The addition of alkali metals as according to the inven-tion has been found to provide esp~cially favorable effects as re-gards the corrosion-resistance of the brazed joint and, in particu-lar, under those conditions where moisture has access to the joint.
This is particularly true in those instances where, aside from one or more alkali metals, the brazing alloy additionally includes beryllium.
If the corrosion-resistance is denoted with values from O to 5 with the value O representing the ideal condition or, in other words, a condition which is practically inachievable, that is, with the value O representing the bo.st corrosion-resistance and the value 5 representing the poorest corrosion-resistance, then the following values may be assigned to the test samples which were run:
the samples with additions of beryllium and alkali metal, l; test samples without beryllium but with alkali metal, 2; and test samples with neither beryllium nor alkali metal, 3.
It has been found advantageous when the tota~ ~uantity of the alloying elements bismuth, strontium, barium, antimony, beryl-ium and sodium in the brazing alloy is at most about 10 percent by weight.
The appended Table sets ~orth several examples of brazing alloys according to the invention. It is sel~-understood that the compositions given are merel- exemplary and are not intended to limit the invention. The values in the Table are in terms of weight percent and in all cases the remainder is essentially aluminum.
.~ -5-t o o o o .
o o o o o o o o o o o - ~ o o o o o o o o o o o \J 0 t~` l I` ~ ~`I N _1 ~ N O
_l ~) O O ~ O O r~ O O
a~ o o oo o o o o , ~ ~ ., ~ D .
ON O O ~1O O O O
~1. .
,0~ 0 0 0 O. O O O
V . .' N N e~ D O O .
~1 0 0 ~`1 0 0 0 ' O O
.1 a~ .... . IIIIII
N O O O O O O O O .
~ t,. .:
N O O O O O ~1 O . :;
~O 1~ 0 0 0 0 0 0 1 11 1 1 0 1 1 :' ,. ~ \I CQ u~ . ' ~
~ u a) ~ ~ O ~ ~
~ 1~oo~rooo~) IIoIIo ~... .
C~l O O O O O O O O O ~ : t V . ~ ;' i~ U~ O ~ .
u~ r o o , ~D ~ O O ~ ' O O O ~ O ~ ~ O ., ,,:
:11 . . ~ .
` ¢11 1~ 1~ . .
'~ ,¢1 ~ ~ 'I o . :
l C~ o o o o' o' o~ 1 O I I I ~. .'. `.', ~D ,n . :
. ~ ~ o ~D. o o o o I I ~ . I I t ; ., O O O O G O O O O . ~ ~
~.' . l ~`' . G~ 1 , ~
. ~ O O ~ O O O I ~ ~ ~ O ~ ~ ~ , ,.
O O O O O 0 0: 0 ' d' ~r U~l (`7 r-l O N ~) .
a~ o o ~ o o ~-1 ~1 o I~ o o o o o o o o .
, . ~''., O
o o ~ o o o -~
. ~ o O O O~ 0 0 1 1 1 1 _ I '~':
. .;. l . .. ; ~:' 8 ~a ~ c o ~ F c ~ ,1 .
~ C ~ oi ~ h ~ ~ S.l ...
. 'U~ 'N 'a~ ~ al .
,"6- 'a(3S1~3 .. . .. . ..... .. .
... ~. .
~' ., .: ,, . :
. ~ . ~ . . . .
.. ..
Claims (9)
1. In a process of brazing aluminum-containing articles, the step of brazing said articles with an aluminum-silicon base brazing alloy which comprises about 4 - 20 percent by weight of silicon; sub-stantially 0.0001 to 1.0 percent by weight of at least one substance selected from the group consisting of sodium, potassium and lithium so as to permit relaxation of the requirements imposed on the brazing atmosphere from those imposed when using similar brazing alloys free of said one substance; substantially 0.01 to 10 percent by weight of at least one element selected from the group consisting of bismuth, strontium, barium and antimony; and/or 0.00001 to 1.0 percent by weight of beryllium, the balance of said alloy being essentially aluminum.
2. A process as defined in claim 1, wherein said brazing alloy comprises substantially 0.005 to 0.1 percent by weight of said one substance.
3. A process as defined in claim 1, wherein the ele-ments of the group consisting of bismuth, strontium, barium and anti-mony constitute substantially 0.05 to 2.00 percent by weight of said brazing alloy when at least one of said elements is present and said beryllium constitutes substantially 0.002 to 0.1 percent by weight of said brazing alloy when said beryllium is present.
4. A process as defined in claim 1, wherein said step is performed at pressures lower than atmospheric pressure.
5. A process as defined in claim 1, wherein said step is performed in a substantially non-oxidizing atmosphere.
6. A process as defined in claim 1, wherein said step is performed fluxlessly.
7. As an item of manufacture, an aluminum-silicon base brazing alloy for use in the fluxless brazing of aluminum-containing articles in substantially non-oxidizing atmospheres and low vacuums, said brazing alloy comprising about 4 - 20 percent by weight of-silicon; substantially 0.0001 to 1.0 percent by weight of at least one substance selected from the group consisting of sodium, potassium and lithium so as to permit relaxation of the requirements imposed on the brazing atmosphere from those imposed when using similar brazing alloys free of said one substance; substantially 0.1 to 10 percent by weight of at least one element selected from the group consisting of bismuth, strontium, barium and antimony;
and/or 0.00001 to 1.0 percent by weight of beryllium, the balance of said alloy being essentially aluminum.
and/or 0.00001 to 1.0 percent by weight of beryllium, the balance of said alloy being essentially aluminum.
8. An item as defined in claim 7, wherein said brazing alloy comprises substantially 0.005 to 0.1 percent by weight of said one substance.
9. An item as defined in claim 7, wherein the elements of the group consisting of bismuth, strontium, barium and antimony constitute essentially 0.005 to 2.0 percent by weight of said brazing alloy when at least one of said elements is present and said beryllium constitutes substantially 0.0002 to 0.1 percent by weight of said brazing alloy when said beryllium is present.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2335940A DE2335940B2 (en) | 1973-07-14 | 1973-07-14 | Use of a solder alloy |
| DE19742412844 DE2412844B1 (en) | 1974-03-18 | 1974-03-18 | Use of a solder alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1051693A true CA1051693A (en) | 1979-04-03 |
Family
ID=25765493
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA204,512A Expired CA1051693A (en) | 1973-07-14 | 1974-07-10 | Process and alloy for brazing aluminum-containing articles |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS5070251A (en) |
| AT (1) | AT333096B (en) |
| CA (1) | CA1051693A (en) |
| CH (1) | CH562653A5 (en) |
| DK (1) | DK140687B (en) |
| FR (1) | FR2236608B2 (en) |
| GB (1) | GB1480502A (en) |
| IT (1) | IT1046934B (en) |
| LU (1) | LU70516A1 (en) |
| NL (1) | NL7409347A (en) |
| NO (1) | NO134248C (en) |
| SE (1) | SE412180C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5330448A (en) * | 1976-09-02 | 1978-03-22 | Sumitomo Light Metal Ind | Brazing aluminum alloy clad with pseudooanode effect |
| DE3166780D1 (en) * | 1980-04-29 | 1984-11-29 | Marston Palmer Ltd | A sheet of foil, clad sheet of aluminium and method of brazing using a strontium containing brazing alloy |
| JPS58113347A (en) * | 1981-12-25 | 1983-07-06 | Kobe Steel Ltd | Heat exchanger made of brazed aluminum |
| JPS60206597A (en) * | 1984-03-30 | 1985-10-18 | Sumitomo Precision Prod Co Ltd | Aluminum alloy solder |
| JP6188511B2 (en) * | 2013-09-20 | 2017-08-30 | 株式会社Uacj | Aluminum alloy brazing sheet for fluxless brazing and manufacturing method thereof |
| WO2017060234A1 (en) * | 2015-10-05 | 2017-04-13 | Hydro Aluminium Rolled Products Gmbh | Aluminum composite material for use in thermal flux-free joining methods and method for producing same |
| EP3359327B1 (en) * | 2015-10-05 | 2019-02-20 | Hydro Aluminium Rolled Products GmbH | Aluminium compounds material for use in thermal fluxless joining method and method for producing the same |
-
1974
- 1974-07-08 AT AT563574A patent/AT333096B/en not_active IP Right Cessation
- 1974-07-10 FR FR7424036A patent/FR2236608B2/fr not_active Expired
- 1974-07-10 IT IT69199/74A patent/IT1046934B/en active
- 1974-07-10 NL NL7409347A patent/NL7409347A/en not_active Application Discontinuation
- 1974-07-10 GB GB30650/74A patent/GB1480502A/en not_active Expired
- 1974-07-10 CA CA204,512A patent/CA1051693A/en not_active Expired
- 1974-07-11 SE SE7409156A patent/SE412180C/en not_active IP Right Cessation
- 1974-07-11 NO NO742535A patent/NO134248C/no unknown
- 1974-07-12 LU LU70516A patent/LU70516A1/xx unknown
- 1974-07-12 DK DK376074AA patent/DK140687B/en unknown
- 1974-07-12 CH CH966474A patent/CH562653A5/xx not_active IP Right Cessation
- 1974-07-15 JP JP49080272A patent/JPS5070251A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2236608A2 (en) | 1975-02-07 |
| NO742535L (en) | 1975-02-10 |
| AT333096B (en) | 1976-11-10 |
| IT1046934B (en) | 1980-07-31 |
| DK140687C (en) | 1980-03-24 |
| SE412180B (en) | 1980-02-25 |
| NO134248C (en) | 1976-09-08 |
| SE412180C (en) | 1981-09-28 |
| ATA563574A (en) | 1976-02-15 |
| NL7409347A (en) | 1975-01-16 |
| LU70516A1 (en) | 1974-11-28 |
| JPS5070251A (en) | 1975-06-11 |
| DK140687B (en) | 1979-10-29 |
| DK376074A (en) | 1975-03-10 |
| CH562653A5 (en) | 1975-06-13 |
| FR2236608B2 (en) | 1980-03-28 |
| GB1480502A (en) | 1977-07-20 |
| NO134248B (en) | 1976-05-31 |
| SE7409156L (en) | 1975-01-15 |
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