US3969604A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of welding galvanized steel
Assignee: Ford Motor Co
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Filing: 1974-10-04
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Granted: 1976-07-13
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Expires: 1994-10-04
Abstract
Abstract A method of welding galvanized steel with a high energy density beam is disclosed. The high energy density can be created by an electron or laser beam with a power density of at least 4×10 6 watts per square inch. A flux material, such as iron oxide, is disposed adjacent the welding zone, preferably by painting thereon, which is effective to form a compound with the zinc of the galvanized steel upon heating. The compound has a vapor pressure substantially the same or lower than the vapor pressure of the steel substrate so that disruption of the weld puddle is prevented to insure that all of the weld puddle will be available to properly close the weld void.
Inventors
- 👤 Edward Lund Baardsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:51
CPC Classifications
B; B23; B23K; B23K15/00; B23K15/0046; B23K26/00; B23K26/20; B23K26/21; B23K26/24; B23K26/244; B23K26/32; B23K2101/00; B23K2101/34; B23K2103/00; B23K2103/02; B23K2103/04; B23K2103/08; B23K2103/50; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49885
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
The product resulting from practicing the method of joining base steel articles, at least one of the articles is coated with a substance having a vapor pressure higher than the base steel article, the steel articles are first mated along at least one zone thereof, secondly a deposit of flux material is located adjacent at least one portion of said zone and is constituted so as to be effective to form a compound with said substance having a boiling and a melting temperature substantially the same or higher than the steel of said base articles and has a vapor pressure substantially the same or less than said base steel articles, and lastly, at least one portion of said zone is subjected to a high energy density beam effective to melt both of said base steel articles in the area of said beam and the flux whereby welding of said articles is obtained, said product is characterized by the absence of voids or porosity.
Claim 2
Dependent Claim
163 words
The product resulting from practicing the method of joining base steel articles, at least one of the articles is coated with a substance having a vapor pressure higher than the base steel article, the steel articles are first mated along at least one zone thereof, secondly a deposit of flux material is located adjacent at least one portion of said zone and is constituted so as to be effective to form a compound with said substance having a boiling and a melting temperature substantially the same or higher than the steel of said base articles and has a vapor pressure substantially the same or less than said base steel articles, and lastly, at least one portion of said zone is subjected to a high energy density beam effective to melt both of said base steel articles in the area of said beam and the flux whereby welding of said articles is obtained, said product is characterized by the absence of voids or porosity.
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) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |