Patent US3794807A successfully refreshed from Google Patents.
US3794807A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of beam welding dissimilar metal parts
Assignee: General Electric Co
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Filing: 1972-04-10
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Granted: 1974-02-26
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Expires: 1992-04-10
Abstract
Abstract An electron-beam welding method is used for joining dissimilar metal parts, one of which contains a refractory metal component. An electron beam directed at the other of said parts at an acute angle to the seam between the two parts forms a conical fusion zone in said other part. The beam center line intersects said other part at a point spaced from the seam by an amount that locates the perimeter of the conical fusion zone tangential to the seam along the fusion-zone length bordering the seam. The weld is formed by moving the beam relative to the seam along a path parallel to the seam while the central axis of the beam is maintained at said acute angle relative to the seam.
Inventors
- 👤 R Maurya
- 👤 C Bailey
- 👤 O Frederick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:46
CPC Classifications
B; B23; B23K; B23K15/00; B23K15/04
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
277 words
A method of welding together first and second parts of dissimilar metallic materials, each part having a substantially flat surface and another surface extending transversely of said flat surface, said first part being of a metallic material including a major component that has a higher melting point than the major component of the metallic material of said second part, comprising the steps of: a. positioning said parts in juxtaposition with said flat surfaces engaging each other along a substantially planar seam, b. developing a high-energy beam that, upon impinging against the transverse surface of said second part, is capable of fusing the metallic material of said second part in a substantially conical fusion zone having a base at said transverse surface and a central longitudinal axis substantially coinciding with the central axis of said beam, c. directing said beam at said transverse surface of said second part of lower melting point material with the central axis of the beam disposed at an acute angle to said seam and its point of intersection with said transverse surface of said record part displaced from said seam by a distance such that said planar seam is substantially tangent to the perimeter of said conical fusion zone along most of the length of said fusion zone that borders said seam, d. forming a weld along said seam by moving said beam relative to said second part in such a manner that said intersection point moves relative to said second part along a path substantially parallel to said seam and spaced by said distance from said seam while said beam central axis is maintained at said acute angle relative to said seam.
Claim 2
Independent Claim
277 words
A method of welding together first and second parts of dissimilar metallic materials, each part having a substantially flat surface and another surface extending transversely of said flat surface, said first part being of a metallic material including a major component that has a higher melting point than the major component of the metallic material of said second part, comprising the steps of: a. positioning said parts in juxtaposition with said flat surfaces engaging each other along a substantially planar seam, b. developing a high-energy beam that, upon impinging against the transverse surface of said second part, is capable of fusing the metallic material of said second part in a substantially conical fusion zone having a base at said transverse surface and a central longitudinal axis substantially coinciding with the central axis of said beam, c. directing said beam at said transverse surface of said second part of lower melting point material with the central axis of the beam disposed at an acute angle to said seam and its point of intersection with said transverse surface of said record part displaced from said seam by a distance such that said planar seam is substantially tangent to the perimeter of said conical fusion zone along most of the length of said fusion zone that borders said seam, d. forming a weld along said seam by moving said beam relative to said second part in such a manner that said intersection point moves relative to said second part along a path substantially parallel to said seam and spaced by said distance from said seam while said beam central axis is maintained at said acute angle relative to said seam.
Claim 3
Dependent Claim
66 words
The method of claim 1 in which, during said welding operation, no substantial melting of the major component of said first part is produced by said high-energy beam but said major component of said first part is heated to a sufficiently high temperature to cause the metal of said second part in said conical fusion zone to wet said major component and bond thereto upon solidification.
Claim 4
Dependent Claim
22 words
The method of claim 1 in which said first part includes as said major component a refractory metallic substance of sintered-together particles.
Claim 5
Dependent Claim
22 words
The method of claim 2 in which said first part includes as said major component a refractory metallic substance of sintered-together particles.
Claim 6
Dependent Claim
58 words
The method of claim 1 in which movement of said beam relative to said second part produces movement of said conical fusion zone relative to said seam in such a manner as To maintain said substantially tangent relationship between said seam and the perimeter of said conical fusion zone as said fusion zone moves relative to said seam.
Claim 7
Dependent Claim
58 words
The method of claim 2 in which movement of said beam relative to said second part produces movement of said conical fusion zone relative to said seam in such a manner as to maintain said substantially tangent relationship between said seam and the perimeter of said conical fusion zone as said fusion zone moves relative to said seam.
Claim 8
Dependent Claim
15 words
The method of claim 1 in which said high energy beam is an electron beam.
Claim 9
Dependent Claim
23 words
The method of claim 1 in which the depth of metal penetrated by said conical fusion zone is at least about 1/2 inch.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |