US4452389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for welding with the help of ion implantation
Assignee: Bendix Corp
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Filing: 1982-04-05
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Granted: 1984-06-05
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Expires: 2002-04-05
Abstract
Abstract The invention is a method for welding together two parts with the help of ion implantation. The method comprises weakening the chemical and atomic bonds of the surface and near surface atoms of at least one of the surfaces to be welded together by ion implantation techniques. The ion implanted surface may then be cold or diffusion welded to the surface of the other part using conventional methods. The method is particularly applicable to welding together parts of dissimilar metals normally difficult to affect a satisfactory weld.
Inventors
- 👤 Kamal E. Amin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:14
CPC Classifications
B; B23; B23K; B23K20/00; B23K20/14; B23K20/24
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
83 words
A method for enhancing welding of at least two metal parts comprising the steps of: cleaning the surfaces of the metal parts to be joined; implanting ions into the surface to be welded of at least one of said two parts to a depth of at least 100 angstroms to weaken the chemical and atomic bonds of the surface and near surface atoms; and welding said ion implanted surface of said at least one part to a clean surface of the other part.
Claim 2
Independent Claim
83 words
A method for enhancing welding of at least two metal parts comprising the steps of: cleaning the surfaces of the metal parts to be joined; implanting ions into the surface to be welded of at least one of said two parts to a depth of at least 100 angstroms to weaken the chemical and atomic bonds of the surface and near surface atoms; and welding said ion implanted surface of said at least one part to a clean surface of the other part.
Claim 3
Dependent Claim
52 words
The method of claim 1 wherein said step of implanting ions further includes the step of implanting ions into the surface to be welded of the other part to a depth of at least 100 angstroms to weaken the chemical bonds of the surface and near surface atoms of said other part.
Claim 4
Independent Claim
24 words
The method of claims 1 or 2 wherein said step of implanting ions implants predetermined metal ions to a depth greater than 100 angstroms.
Claim 5
Dependent Claim
81 words
The method of claim 1 wherein said step of welding comprises the steps of: placing the ion implanted surface of said at least one part adjacent to a clean surface of said second part; and applying an external force urging said ion implanted surface of said at least one part into intimate contact with the clean surface of said other part to cause a diffusion of the material of said at least one part with the material of said other part.
Claim 6
Dependent Claim
28 words
The method of claim 4 wherein said step of applying an external force comprises the step of passing said parts through a roller mechanism exerting said mechanical force.
Claim 7
Independent Claim
16 words
The method of claims 1 or 4 wherein said metal parts are made from dissimilar metals.
Claim 8
Independent Claim
18 words
The method of claims 1 or 4 wherein said step of welding is performed in a vacuum atmosphere.
Claim 9
Independent Claim
19 words
The method of claims 1 or 4 wherein said step of welding is performed in an inert gas atmosphere.
Claim 10
Dependent Claim
72 words
The method of claim 4 wherein the parts are made from dissimilar materials having different melting points, said step of welding further includes the step of heating said parts with their surfaces in intimate contact to a predetermined temperature below the melting temperature of the part having the lowest melting point to enhance the diffusion rate of the material of said at least one part with the material of said other part.
Claim 11
Dependent Claim
16 words
The method of claim 9 wherein said step of heating includes the step of induction heating.
Claim 12
Dependent Claim
16 words
The method of claim 9 wherein said step of heating includes the step of radiant heating.
Claim 13
Dependent Claim
16 words
The method of claim 9 wherein said step of heating is performed in a vacuum atmosphere.
Claim 14
Dependent Claim
16 words
The method of claim 9 wherein said step of heating is performed in an inert atmosphere.
Claim 15
Independent Claim
96 words
A method for welding together two parts made from dissimilar metals comprising the steps of: implanting predetermined ions to a depth greater than 100 angstroms into the surface of one of said parts to be welded to the other part; placing said ion implanted surface in intimate contact with the surface of said other part; and applying a force across the contacting area of the two parts sufficient to establish atomic bonds across the interface and diffuse the metal of the first part with the dissimilar metal of the second part to affect a cold weld.
Claim 16
Independent Claim
96 words
A method for welding together two parts made from dissimilar metals comprising the steps of: implanting predetermined ions to a depth greater than 100 angstroms into the surface of one of said parts to be welded to the other part; placing said ion implanted surface in intimate contact with the surface of said other part; and applying a force across the contacting area of the two parts sufficient to establish atomic bonds across the interface and diffuse the metal of the first part with the dissimilar metal of the second part to affect a cold weld.
Claim 17
Dependent Claim
28 words
The method of claim 14 wherein said step of applying a force includes the step of passing said parts through a roller mechanism to affect said cold weld.
Claim 18
Dependent Claim
32 words
The method of claim 14 further including the step of implanting ions includes the step of implanting ions into the surface of the other part to be welded to the first part.
Claim 19
Independent Claim
19 words
The method of claims 14 or 16 wherein said step applying a force is performed in a vacuum atmosphere.
Claim 20
Independent Claim
20 words
The method of claims 14 or 16 wherein said step of applying a force is performed in an inert atmosphere.
Claim 21
Independent Claim
25 words
The method of claims 14 or 16 wherein said step of implanting predetermined ions implants predetermined metal ions to a depth greater than 100 angstroms.
Claim 22
Independent Claim
120 words
A method for welding together two parts of dissimilar metals having different melting points comprising the steps of: implanting predetermined ions to a depth greater than 100 angstroms into the surface of one of said parts to be welded to the other part; placing said ion implanted surface in intimate contact with a clean surface of said other part; applying a force across said contacting surfaces to hold them in intimate contact; and heating said parts to a predetermined temperature below the melting temperature of the part made from the metal having the lowest melting temperature to facilitate the diffusion of the metal of the first part with the dissimilar metal of the second part to affect a diffusion bond.
Claim 23
Independent Claim
120 words
A method for welding together two parts of dissimilar metals having different melting points comprising the steps of: implanting predetermined ions to a depth greater than 100 angstroms into the surface of one of said parts to be welded to the other part; placing said ion implanted surface in intimate contact with a clean surface of said other part; applying a force across said contacting surfaces to hold them in intimate contact; and heating said parts to a predetermined temperature below the melting temperature of the part made from the metal having the lowest melting temperature to facilitate the diffusion of the metal of the first part with the dissimilar metal of the second part to affect a diffusion bond.
Claim 24
Dependent Claim
13 words
The method of claim 20 wherein said step of heating includes induction heating.
Claim 25
Dependent Claim
13 words
The method of claim 20 wherein said step of heating includes radiant heating.
Claim 26
Dependent Claim
16 words
The method of claim 20 wherein said step of heating is performed in a vacuum atmosphere.
Claim 27
Dependent Claim
16 words
The method of claim 20 wherein said step of heating is performed in an inert atmosphere.
Claim 28
Independent Claim
36 words
The method of claims 21 or 22 wherein said step of implanting predetermined ions further includes the step of implanting predetermined ions into the surface of said other part to be welded to said first part.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-06-05 | 1987-12-05 | 1988-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-06-05 | 1991-12-05 | 1992-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-06-05 | 1995-12-05 | 1996-06-05 | $7700.00 | Window Closed / Lapsed |