US3627979A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding electrode
Assignee: Eutectic Corp
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Filing: 1970-03-23
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Granted: 1971-12-14
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Expires: 1990-03-23
Abstract
Abstract This invention relates to a welding electrode for depositing a highly wear-resistant surface layer upon a base metal. The welding electrode has a core made up with a mild steel sheath filled with tungsten carbide, chromium, manganese, ferrosilicon, calcium and silicon. A reaction-type flux coating is disposed on the core.
Inventors
- 👤 Joseph F Quaas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 23:45
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327; C; C23; C23C; C23C30/00; B23K35/36; B23K35/365; B23K35/368
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
54 words
The welding electrode of claim 1 wherein said fill comprises the following constituents in the weight percentages indicated: Percent Weight Constituent Preferred Range Chromium 8 to 20 Intermetallic carbide-forming metals 0 to 15 Manganese 0.05 to 3 Ferrosilicon 0.05 to 4 Calcium 0.01 to 3.5 Silica 0.01 to 3 Refractory carbides 45 to 90
Claim 2
Dependent Claim
33 words
The welding electrode of claim 2 wherein said metallic hollow sheath is an alloy taken from the group consisting of nickel base alloys, high alloy steels, mild steel alloys and cobalt base alloys.
Claim 3
Dependent Claim
23 words
The welding electrode of claim 2 wherein said intermetallic carbide-forming metals are taken from the group consisting of tungsten, chromium, titanium and vanadium.
Claim 4
Dependent Claim
26 words
The welding electrode of claim 2 wherein said refractory carbides are taken from the group consisting of chromium carbide, tungsten carbide, titanium carbide and vanadium carbide.
Claim 5
Dependent Claim
23 words
The welding electrode of claim 2 wherein said core comprises 37 to 80 percent sheathing and 20 to 63 percent fill by weight.
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) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |