US3890137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Welding powder for producing wear-resistant layers by build-up welding
Assignee: Goetzewerke Friedrich Goetze AG
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Filing: 1974-03-15
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Granted: 1975-06-17
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Expires: 1994-03-15
Abstract
Abstract A welding powder contains a first component selected from the group consisting of molybdenum, tungsten, and a mixture of these two metals and a second component of at least one element selected from the group consisting of oxygen, nitrogen, hydrogen and carbon. The second component of oxygen, nitrogen, hydrogen or carbon is present in the metal of the welding powder partly in an unbound, dissolved state.
Inventors
- 👤 Horst Beyer
- 👤 Ulrich Buran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:25
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/327
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
229 words
A WELDING POWDER FOR PRODUCING WATER-RESISTANT LAYERS BY BUILD-UP WLDING, CONSISTING ESSENTIALLY OF: A. A FIRST COMPONENT SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM POWDER, TUNGSTEN POWDER, AN ALLOY OF MOLYBDENUM AND TUNGSTEN IN POWDER FORM, AND A MIXTURE OF MOLYBDENUM POWDER AND TUNGSTEN POWDER, AND B. A SECOND COMPONENT OF AT LEAST ONE ELEMENT SELECTED F FROM THE GROUP CONSISTING OF OXYGEN, NITROGEN, HYDROGEN AND CARBON, SAID SECOND COMPONENT BEING PRESENT PARTLY IN A FREE, UNBOUND, DISSOLVED STATE; AND WHEN OXYGEN IS PRESENT AS THE WELDING POWDER, IT IS PRESENT IN AN AMOUNT OF ABOUT 0.001 TO ABOUT 12 PERCENT BY WEIGHT, WITH THE FREE OXYGEN CONTENT BEING FROM ABOUT 0.0001 TO ABOUT 0.12 WEIGHT PERCENT; WHEN NITROGEN IS PRESENT IN THE WELDING POWDER, IT IS PRESENT IN AN AMOUNT OF ABOUT 0.001 TO ABOUT 0.5 PERCENT BY WEIGHT, WITH THE FREE NITROGEN CONTENT BEING FROM ABOUT 0.00001 TO ABOUT 0.00005 WEIGHT PERCENT; WHEN HYDROGEN IS PRESENT IN THE WELDING POWDER, IT IS PRESENT IN AN AMOUNT OF ABOUT 0.001 TO ABOUT 0.5 PERCENT BY WEIGHT, WITH THE FREE HYDROGEN CONTENT BEING FROM ABOUT 0.00001 TO ABOUT 0.005 WEIGHT PERCENT; AND WHEN ARBON IS PRESENT IN THE WELDING POWDER, IT IS PRESENT IN AN AMOUNT OF ABOUT 0.01 TO ABOUT 2.5 OERCENT BY WEIGHT, WITH THE FREE CARBON CONTENT BEING FROM ABOUT 0.003 TO ABOUT 0.8 WEIGHT PERCENT.
Claim 2
Dependent Claim
229 words
A WELDING POWDER FOR PRODUCING WATER-RESISTANT LAYERS BY BUILD-UP WLDING, CONSISTING ESSENTIALLY OF: A. A FIRST COMPONENT SELECTED FROM THE GROUP CONSISTING OF MOLYBDENUM POWDER, TUNGSTEN POWDER, AN ALLOY OF MOLYBDENUM AND TUNGSTEN IN POWDER FORM, AND A MIXTURE OF MOLYBDENUM POWDER AND TUNGSTEN POWDER, AND B. A SECOND COMPONENT OF AT LEAST ONE ELEMENT SELECTED F FROM THE GROUP CONSISTING OF OXYGEN, NITROGEN, HYDROGEN AND CARBON, SAID SECOND COMPONENT BEING PRESENT PARTLY IN A FREE, UNBOUND, DISSOLVED STATE; AND WHEN OXYGEN IS PRESENT AS THE WELDING POWDER, IT IS PRESENT IN AN AMOUNT OF ABOUT 0.001 TO ABOUT 12 PERCENT BY WEIGHT, WITH THE FREE OXYGEN CONTENT BEING FROM ABOUT 0.0001 TO ABOUT 0.12 WEIGHT PERCENT; WHEN NITROGEN IS PRESENT IN THE WELDING POWDER, IT IS PRESENT IN AN AMOUNT OF ABOUT 0.001 TO ABOUT 0.5 PERCENT BY WEIGHT, WITH THE FREE NITROGEN CONTENT BEING FROM ABOUT 0.00001 TO ABOUT 0.00005 WEIGHT PERCENT; WHEN HYDROGEN IS PRESENT IN THE WELDING POWDER, IT IS PRESENT IN AN AMOUNT OF ABOUT 0.001 TO ABOUT 0.5 PERCENT BY WEIGHT, WITH THE FREE HYDROGEN CONTENT BEING FROM ABOUT 0.00001 TO ABOUT 0.005 WEIGHT PERCENT; AND WHEN ARBON IS PRESENT IN THE WELDING POWDER, IT IS PRESENT IN AN AMOUNT OF ABOUT 0.01 TO ABOUT 2.5 OERCENT BY WEIGHT, WITH THE FREE CARBON CONTENT BEING FROM ABOUT 0.003 TO ABOUT 0.8 WEIGHT PERCENT.
Claim 3
Dependent Claim
24 words
The welding powder as defined in claim 1 wherein the welding powder contains 0.01 to 20 percent by weight copper or a copper alloy.
Claim 4
Dependent Claim
27 words
The welding powder as defined in claim 1, further containing at least one carbide forming element of titanium, tantalum, niobium, zirconium, chromium or vanadium, or alloys thereof.
Claim 5
Dependent Claim
25 words
The welding powder as defined in claim 3 wherein the sum of the content of the carbide forming elements is 50 percent by weight maximum.
Claim 6
Dependent Claim
12 words
The welding powder as defined in claim 1, further containing elementary boron.
Claim 7
Dependent Claim
22 words
The welding powder as defined in claim 5 wherein the boron content is from about 0.001 to about 20 percent by weight.
Claim 8
Dependent Claim
11 words
The welding powder as defined in claim 1, containing carbon dust.
Claim 9
Dependent Claim
17 words
The welding powder as defined in claim 7 wherein the carbon dust is soot or graphite dust.
Claim 10
Dependent Claim
14 words
The welding powder as defined in claim 1 and further containing iron carbide powder.
Claim 11
Dependent Claim
24 words
The welding powder as defined in claim 1 and further containing a minor amount of iron powder or a powder of an iron alloy.
Claim 12
Dependent Claim
15 words
The welding powder of claim 1 which contains carbon and oxygen as a second component.
Claim 13
Dependent Claim
15 words
The welding powder as defined in claim 1 which contains oxygen as a second component.
Claim 14
Dependent Claim
19 words
The welding powder as defined in claim 1 which contains oxygen, nitrogen, hydrogen and carbon as a second component.
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) | 1978-06-16 | 1978-12-16 | 1979-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-16 | 1982-12-16 | 1983-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-16 | 1986-12-16 | 1987-06-17 | $7700.00 | Window Closed / Lapsed |