EP0140267B1
Expired / Lapsed
EP
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Method of brazing an aluminum material
Assignee: Toyota Central R&D Labs Inc
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Filing: 1984-10-13
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Granted: 1987-07-29
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Expires: 2004-10-13
Abstract
No abstract record available.
Inventors
- 👤 Kenichi Suzuki
- 👤 Fusayoshi Miura
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 00:50
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; B; B23; B23K; B23K1/00; B23K1/20; B23K1/203; B23K35/00; B23K35/02; B23K35/0222; B23K35/0233; B23K35/0244; B23K35/22; B23K35/36; B23K35/3601; B23K35/3603; B23K35/3605; B23K2101/00; B23K2101/04; B23K2101/14; B23K2103/00; B23K2103/08; B23K2103/10; B23K35/24; B23K35/28; B23K35/286
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
103 words
A method of brazing an aluminum material which comprises: a chemical conversion coating step of bringing at least a brazing desired part of the aluminum material into contact with a treating solution containing potassium and fluorine ions to form a brazing flux layer composed of potassium pentafluoroaluminate on the surface of said aluminum material; and a brazing step of heating at least the flux layer formed part to a temperature of lower than the melting point of the aluminum material and higher than the melting point of a brazing alloy to join said aluminum material to a counterpart material with said brazing alloy
Claim 2
Independent Claim
103 words
A method of brazing an aluminum material which comprises: a chemical conversion coating step of bringing at least a brazing desired part of the aluminum material into contact with a treating solution containing potassium and fluorine ions to form a brazing flux layer composed of potassium pentafluoroaluminate on the surface of said aluminum material; and a brazing step of heating at least the flux layer formed part to a temperature of lower than the melting point of the aluminum material and higher than the melting point of a brazing alloy to join said aluminum material to a counterpart material with said brazing alloy
Claim 3
Independent Claim
108 words
The method of brazing an aluminum material which comprises: a chemical conversion coating step of bringing an aluminum brazing alloy into contact with a treating solution containing potassium and fluorine ions to form a flux layer composed of K 2 AIF 5 on the surface of said brazing alloy; and a brazing step of supplying the brazing alloy subjected to said chemical conversion coating step to a brazing desired part of the aluminum material and heating to a temperature of higher than the melting point of the brazing alloy and lower than the melting point of the aluminum material to braze said aluminum material to a counterpart material.
Claim 4
Independent Claim
108 words
The method of brazing an aluminum material which comprises: a chemical conversion coating step of bringing an aluminum brazing alloy into contact with a treating solution containing potassium and fluorine ions to form a flux layer composed of K 2 AIF 5 on the surface of said brazing alloy; and a brazing step of supplying the brazing alloy subjected to said chemical conversion coating step to a brazing desired part of the aluminum material and heating to a temperature of higher than the melting point of the brazing alloy and lower than the melting point of the aluminum material to braze said aluminum material to a counterpart material.
Claim 5
Dependent Claim
17 words
The method of brazing according to claim 1 or 2, wherein said contact is effected by immersion.
Claim 6
Dependent Claim
37 words
The method of brazing according to claim 2, wherein said brazing alloy is in form of a sheet and the supply of the brazing alloy to the aluminum material is effected by sandwiching with the aluminum material.
Claim 7
Dependent Claim
17 words
The method of brazing according to claim 2, wherein said brazing alloy is in form of powder.
Claim 8
Dependent Claim
30 words
The method of brazing according to claim 5, wherein the supply of said brazing alloy is effected by immersing the aluminum material in a suspension of the brazing alloy powder.
Claim 9
Independent Claim
41 words
The method of brazing according to any of claims 3 to 5, wherein said treating solution is an aqueous solution containing 0.01-1 mole/I of the potassium ions and the fluorine ions at a molar ratio to the potassium ions of 1-10.
Claim 10
Dependent Claim
20 words
The method of brazing according to claim 7, wherein said treating solution is an aqueous solution of KHF 2 .
Claim 11
Dependent Claim
20 words
The method of brazing according to claim 7, wherein said treating solution is an aqueous solution of KF and HF.
Claim 12
Dependent Claim
16 words
The method of brazing according to claim 1, wherein said treating solution further contains zinc ions.
Claim 13
Dependent Claim
43 words
The method of brazing according to claim 10, wherein said treating solution is an aqueous solution containing 0.01-1 mole/I of the potassium ions, the fluorine ions at a molar ratio to the potassium ions of 1-10 and 0.01-0.16 mole/I of the zinc ions.
Claim 14
Dependent Claim
22 words
The method of brazing according to claim 1 or 10, wherein said treating solution further contains a potassium pentafluoroaluminate powder suspended therein.
Claim 15
Dependent Claim
22 words
The method of brazing according to claim 1 or 10, wherein said treating solution further contains an aluminum fluoride powder suspended therein.
Claim 16
Dependent Claim
16 words
The method of brazing according to claim 1, wherein said aluminum material is a brazing sheet.
Claim 17
Dependent Claim
20 words
The method of brazing according to claim 3, wherein said chemical conversion coating step is effected in an electric field.
Claim 18
Dependent Claim
17 words
The method of brazing according to claim 10 or 13, wherein said aluminum material is an assembly.
Claim 19
Dependent Claim
30 words
The method of brazing according to claim 11, wherein said contact is effected by immersion and said treating solution is an aqueous solution of KHF 2 and ZnF 2 .
Claim 20
Dependent Claim
30 words
The method of brazing according to claim 11, wherein said contact is effected by immersion and said treating solution is an aqueous solution of KF, HF and ZnF 2 .
Claim 21
Dependent Claim
22 words
The method of brazing according to claim 11, wherein said contact is effected by immersion and said aluminum material is an assembly.
References Cited (Backward Citations)
No citation records indexed.
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