US3573426A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arc welding
Assignee: Murex Welding Processes Ltd
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Filing: 1967-08-18
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Granted: 1971-04-06
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Expires: 1987-08-18
Abstract
Abstract Process for the arc welding of mild steel workpieces without external shielding of the arc by the use of cored tubular electrodes which deposit weld metal of improved physical properties and containing 0.5-1.3 percent aluminum 0.3-2 percent manganese, 0.1-1 percent silicon, not more than 0.12 percent carbon, and not more than 0.2 percent titanium, the balance substantially iron.
Inventors
- 👤 Paul Desmond Blake
- 👤 Roy Douglas Johnston
- 👤 Brian Phelps
- 👤 Edwin Albert Chapman
- 👤 Ronald Leonard Bartlett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 05:11
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/02; B23K35/0255; B23K35/0261; B23K35/0266; B23K35/22; B23K35/24; B23K35/30; B23K35/3053; B23K35/36; B23K35/3601; B23K35/3603; B23K35/368; B23K9/00; B23K9/10; B23K9/24; B23K35/3605
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
A process as claimed in claim 1, in which the weld metal contains 0.12-0.8 percent aluminum, 0.7-1.75 percent manganese, 0.4-0.85 percent silicon and a maximum carbon content of 0.08 percent.
Claim 2
Dependent Claim
25 words
A process as claimed in claim 1, in which the electrode is used with AC current at a current density of 20,000-120,000 amperes per sq.in.
Claim 3
Dependent Claim
30 words
A process as claimed in claim 3, in which the power supply yields an open current voltage of 30-60 volts and a voltage drop not exceeding 0.1 volts per ampere.
Claim 4
Dependent Claim
64 words
A process as claimed in claim 1, in which the welding operation is carried out under conditions such that V 1.9A+ Chi when AC welding current is used and V 1.1A+ psi when DC welding current is used; V being the arc voltage, A being the current density as hereinbefore defined, Chi being between 18 and 29 and psi being between 19 and 30.
Claim 5
Dependent Claim
35 words
A process as claimed in claim 5, in which the core of the electrode contains 0.8-4.5 percent aluminum, 0-0.6 percent silicon, 0-0.3 percent titanium and 0.3-1.6 percent manganese based on the weight of the electrode.
References Cited (Backward Citations)
US2520806A
Cited
US3177340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |