US3617685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing crack-free electron beam welds of jet engine components
Assignee: Chromalloy Gas Turbine Corp
•
Filing: 1970-08-19
•
Granted: 1971-11-02
•
Expires: 1990-08-19
Abstract
Abstract Crack-free welds of jet engine components formed essentially of a heat resistant nickel-base alloy having a tendency to be weldcrack sensitive are produced by abutting selected surface of at least a pair of structural elements of said nickel-base alloy, the elements being assembled in welding relationship with an iron-base shim therebetween, the elements being electron beam welded together into a unitary structure by melting the iron-base shim at the interface of the abutting surfaces, whereby the resulting weld which is an alloy of the iron-base shim and the nickel-base alloy is crack-free.
Inventors
- 👤 Harry W Brill-Edwards
- 👤 Fereidoon Zahabi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:38
CPC Classifications
F; F01; F01D; F01D9/00; F01D9/02; F01D9/04; F01D9/042; F01D9/044; B; B23; B23K; B23K15/00; B23K15/0006; B23K35/00; B23K35/001; B23K35/004
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
200 words
A method for producing a crack-free weld by the electron beam welding of at least a pair of heat resistant structural elements consisting essentially of a heat-resistant nickel-base alloy containing by weight about 5% to 12% Cr, about 3% to 8% Mo, about 2.3% to 10% Ta, the combined Mo and Ta content ranging from about 5% to 14%, about 5% to 15.5% Co, up to about 7% Ti, up to about 8% Al, the combined Ti and Al content ranging from about 5% to 9%, up to about 0.3% C, up to about 0.05% B, up to about 1% Zr, up to about 2% Hf, up to about 2% Fe and the balance essentially nickel which comprises, providing said at least one pair of structural elements of said nickel-base alloy, assembling said elements with selected surfaces thereof in abutting welding relationship with a low carbon iron-base shim disposed between said abutting surfaces, and then electron beam welding said elements into a unitary structure by the electron beam melting of the iron-base shim at the abutting surfaces of said elements, whereby a narrow crack-free weld is obtained formed as an alloy of said nickel-base alloy with said iron-base shim elements.
Claim 2
Independent Claim
200 words
A method for producing a crack-free weld by the electron beam welding of at least a pair of heat resistant structural elements consisting essentially of a heat-resistant nickel-base alloy containing by weight about 5% to 12% Cr, about 3% to 8% Mo, about 2.3% to 10% Ta, the combined Mo and Ta content ranging from about 5% to 14%, about 5% to 15.5% Co, up to about 7% Ti, up to about 8% Al, the combined Ti and Al content ranging from about 5% to 9%, up to about 0.3% C, up to about 0.05% B, up to about 1% Zr, up to about 2% Hf, up to about 2% Fe and the balance essentially nickel which comprises, providing said at least one pair of structural elements of said nickel-base alloy, assembling said elements with selected surfaces thereof in abutting welding relationship with a low carbon iron-base shim disposed between said abutting surfaces, and then electron beam welding said elements into a unitary structure by the electron beam melting of the iron-base shim at the abutting surfaces of said elements, whereby a narrow crack-free weld is obtained formed as an alloy of said nickel-base alloy with said iron-base shim elements.
Claim 3
Dependent Claim
171 words
The method of claim 1, wherein the nickel-base alloy of the structural elements being welded is selected from the group consisting of by weight (A) about 7.5% to 12% Cr, about 3% to 8% Mo, about 1.3% to 10% Ta, the combined Mo and Ta content ranging from about 7% to 13%, about 5% to 10.5% Co, up to about 2.5% Ti, about 5% to 7% Al, the combined Ti and Al content ranging from about 5.5% to 8%, up to about 0.2% C, up to about 0.05% B, up to about 1% Zr, up to about 2% Hf, up to about 2% Fe and the balance essentially Ni; and (B) about 7.5% to 8.5% Cr, about 5.75% to 6.25% Mo, about 4% to 4.5% Ta, about 9.5% to 10.5% Co, about 0.8% to 1.2% Ti, about 5.75% to 6.25% Al, about 0.08% to 0.15% C, about 0.01% to 0.02% B, about 0.05% to 0.1% Zr, up to about 0.5% Fe, about 0.1% to 2% Hf, and the balance essentially nickel.
Claim 4
Dependent Claim
18 words
The method of claim 1, wherein the iron-base shim is a steel containing at least about 95% iron.
Claim 5
Dependent Claim
44 words
The method of claim 2, wherein the nickel-base alloy comprises about 8% Cr, about 6% Mo, about 4.3% Ta, about 10% Co, about 6% Al about 1% Ti, about 0.015% B, about 0.08% Zr, about 1% to 1.5% Hf and the balance essentially nickel.
Claim 6
Independent Claim
233 words
A method for producing a crack-free weld by the electron beam welding of at least a pair of heat resistant jet engine guide vanes characterized by an airfoil section connected via their ends to buttresses having platform faces by means of which one guide vane can be welded to the other, the guide vanes consisting essentially of a heat resistant nickel-base alloy containing by weight about 5% to 12% Cr, about 3% to 8% Mo, about 2.3% to 10% Ta, the combined Mo and Ta content ranging from about 5% to 14%, about 5% to 15.5% Co, up to about 7% Ti, up to about 8% Al the combined Ti and Al content ranging from about 5% to 9%, up to about 0.3% C, up to about 0.05% B, up to about 1% Zr, up to about 2% Hf, up to about 2% Fe and the balance essentially nickel which comprises, providing said at least one pair of said guide vanes of said nickel-base alloy, assembling said guide vanes with selected platform faces thereof in abutting welding relationship with and iron-base shim disposed between said abutting surfaces, and then electron beam welding said elements into a unitary structure by the electron beam melting of the iron-base shim at the abutting faces of said buttresses, whereby a narrow crack-free weld is obtained formed as an alloy of said nickel-base alloy with said iron-base shim.
Claim 7
Independent Claim
233 words
A method for producing a crack-free weld by the electron beam welding of at least a pair of heat resistant jet engine guide vanes characterized by an airfoil section connected via their ends to buttresses having platform faces by means of which one guide vane can be welded to the other, the guide vanes consisting essentially of a heat resistant nickel-base alloy containing by weight about 5% to 12% Cr, about 3% to 8% Mo, about 2.3% to 10% Ta, the combined Mo and Ta content ranging from about 5% to 14%, about 5% to 15.5% Co, up to about 7% Ti, up to about 8% Al the combined Ti and Al content ranging from about 5% to 9%, up to about 0.3% C, up to about 0.05% B, up to about 1% Zr, up to about 2% Hf, up to about 2% Fe and the balance essentially nickel which comprises, providing said at least one pair of said guide vanes of said nickel-base alloy, assembling said guide vanes with selected platform faces thereof in abutting welding relationship with and iron-base shim disposed between said abutting surfaces, and then electron beam welding said elements into a unitary structure by the electron beam melting of the iron-base shim at the abutting faces of said buttresses, whereby a narrow crack-free weld is obtained formed as an alloy of said nickel-base alloy with said iron-base shim.
Claim 8
Dependent Claim
171 words
The method of claim 5, wherein the nickel-base alloy of the structural elements being welded is selected from the group consisting of by weight (A) about 7.5% to 12% Cr, about 3% to 8% Mo, about 2.3% to 10% Ta, the combined Mo and Ta content ranging from about 7% to 13%, about 5% to 10.5% Co, up to about 2.5% Ti, about 5% to 7% Al the combined Ti and Al content ranging from about 5.5% to 8%, up to about 0.2% C, up to about 0.05% B, up to about 1% Zr, up to about 2% Hf, up to about 2% Fe and the balance essentially Ni; and (B) about 7.5% to 8.5% Cr, about 5.75% to 6.25% Mo, about 4% to 4.5% Ta, about 9.5% to 10.5% Co, about 0.8% to 1.2% Ti, about 5.75% to 6.25% Al about 0.08% to 0.15% C, about 0.01% to 0.02% B, about 0.05% to 0.1% Zr, up to about 0.5% Fe, about 0.1% to 2% Hf, and the balance essentially nickel.
Claim 9
Dependent Claim
18 words
The method of claim 5, wherein the iron-base shim is a steel containing at least about 95% iron.
Claim 10
Dependent Claim
44 words
The method of claim 6, wherein the nickel-base alloy comprises about 8% Cr, about 6% Mo, about 4.3% Ta, about 10% Co, about 6% Al about 1% Ti, about 0.015% B, about 0.08% Zr, about 1% to 1.5% Hf and the balance essentially nickel.
References Cited (Backward Citations)
US2054770A
Cited
US2664622A
Cited
US2985747A
Cited
US3094414A
Cited
US3391033A
Cited
US3310399A
Cited
US3398256A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |