US4300474A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for application of metallic coatings to metallic substrates
Assignee: Rolls Royce PLC
•
Filing: 1980-12-30
•
Granted: 1981-11-17
•
Expires: 2000-12-30
Abstract
Abstract A metallic coating is applied to a metallic substrate by directing a laser beam on to the substrate and simultaneously directing a gas stream containing entrained particles of the coating material on to the area of laser impingement on the substrate. The particles are melted by the laser beam to form a pool of molten coating metal. Relative movement is effected between the laser beam and substrate so that a pool of molten coating metal traverses the substrate to form a solidified metallic coating which is fused to the metallic substrate.
Inventors
- 👤 Livsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:44
CPC Classifications
C; C23; C23C; C23C24/00; C23C24/08; C23C24/10; C23C24/103; C23C24/106; B; B05; B05B; B05B7/00; B05B7/16; B05B7/22; B05B7/228; B23; B23K; B23K26/00; B23K26/20; B23K26/32; B23K26/34; B23K35/00; B23K35/02; B23K35/0222; B23K35/0244; B29; B29C; B29C64/00; B29C64/10; B29C64/141; B29C64/153; B23K2103/00; B23K2103/18; B23K2103/26; B23K2103/50; B23K35/22; B23K35/24; B23K35/30; B23K35/3046; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058; C22C19/07
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
144 words
Apparatus suitable for applying a metallic coating to a metallic substrate comprising a laser arranged to direct a laser beam on to the substrate to be coated, said laser beam having an area of impingement on said substrate, means arranged to direct a gas stream on to the area of impingement of said laser beam on said substrate, means for metering particles of the metallic coating material into said gas stream such that said metered metallic particles of coating material are entrained therein and directed to said area of laser beam impingement on said substrate, and means to effect a relative movement between said laser and said substrate so that in operation, said area of laser beam impingement, and hence metallic coating impingement, traverses said substrate at such a rate that fusion takes place between said metallic substrate and said molten metallic coating material.
Claim 2
Dependent Claim
144 words
Apparatus suitable for applying a metallic coating to a metallic substrate comprising a laser arranged to direct a laser beam on to the substrate to be coated, said laser beam having an area of impingement on said substrate, means arranged to direct a gas stream on to the area of impingement of said laser beam on said substrate, means for metering particles of the metallic coating material into said gas stream such that said metered metallic particles of coating material are entrained therein and directed to said area of laser beam impingement on said substrate, and means to effect a relative movement between said laser and said substrate so that in operation, said area of laser beam impingement, and hence metallic coating impingement, traverses said substrate at such a rate that fusion takes place between said metallic substrate and said molten metallic coating material.
Claim 3
Dependent Claim
18 words
Apparatus as claimed in claim 1 wherein said laser is within the power range 800 to 2250 watts.
Claim 4
Dependent Claim
33 words
An apparatus as claimed in claim 1 in which said laser beam has a diameter at said laser beam area of impingement on said substrate in a range of 1 to 4 mm.
Claim 5
Dependent Claim
33 words
An apparatus as claimed in claim 1 in which said relative movement between said laser beam and said substrate has a relative velocity within a range of 4 to 20 mm. per second.
Claim 6
Dependent Claim
25 words
An apparatus as claimed in claim 1 wherein said gas stream has a flow rate within a range of 2 to 5 liters per minute.
Claim 7
Dependent Claim
42 words
An apparatus as claimed in claim 1 in which said metering means has a delivery rate of said particles of metallic coating material entrained in said gas stream on to said substrate within a range of 45 to 55 mg. per second.
Claim 8
Dependent Claim
14 words
An apparatus as claimed in claim 1 in which said gas stream is argon.
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) | 1984-11-16 | 1985-05-18 | 1985-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-16 | 1989-05-18 | 1989-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-16 | 1993-05-18 | 1993-11-17 | $7700.00 | Window Closed / Lapsed |