US3890105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Metallic sintering powder or alloy
Assignee: Bayerische Leichtmetallwerk Graf Bluecher Von Wahlstatt KG
•
Filing: 1973-04-23
•
Granted: 1975-06-17
•
Expires: 1993-04-23
Abstract
Abstract Metallic sintered alloys, especially sintered steel alloys, are prepared from a composition of metal powder and the alloying components and/or from an alloying powder and admixtures of carbides such as chromium-carbides by pressure and sintering. If desired, a following cold or warm working step may be used to improve the densification. The starting powder composition contains 0.5-50 percent by weight of carbides consisting completely or substantially of complex chromiumcarbides and/or complex manganese-carbides and/or mixed carbides compose these elements.
Inventors
- 👤 Gerd Weissmann
- 👤 Edgar Kuebel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:21
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; C22C33/0292; C22C33/0285
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
90 words
A POWDER COMPOSITION FOR MAKING A SINTERED STEEL ALLOY COMPRISING A MIXTURE OF IRON POWDERS, AND ALLOYING COMPONENTS INCLUDING CARBIDES IN POWDER FROM, SAID CARBIDES BEING PRESENT FROM 0.5 TO 50 PERCENT BY WEIGHT OF THE TOTAL COMPOSITION, SAID CARBIDES COMPRISING AN ADDITIVE AND WHOLLY OR PREDOMINANTLY CARBON DEFICIENT CARBIDES SELECTED FROM THE GROUP CONSISTING OF CHROMIUM CARBIDES, MANGANESE CARBIDES AND MIXED CARBIDES OF CHROMIUM AND MANGANESE AND INCLUDING THE STRUCTURAL TYPES M3C, M7C3, M23C6, WHEREIN M IS THE METAL COMPONENT AND C IS THE CARBON COMPONENT OF THE CARBIDE.
Claim 2
Dependent Claim
90 words
A POWDER COMPOSITION FOR MAKING A SINTERED STEEL ALLOY COMPRISING A MIXTURE OF IRON POWDERS, AND ALLOYING COMPONENTS INCLUDING CARBIDES IN POWDER FROM, SAID CARBIDES BEING PRESENT FROM 0.5 TO 50 PERCENT BY WEIGHT OF THE TOTAL COMPOSITION, SAID CARBIDES COMPRISING AN ADDITIVE AND WHOLLY OR PREDOMINANTLY CARBON DEFICIENT CARBIDES SELECTED FROM THE GROUP CONSISTING OF CHROMIUM CARBIDES, MANGANESE CARBIDES AND MIXED CARBIDES OF CHROMIUM AND MANGANESE AND INCLUDING THE STRUCTURAL TYPES M3C, M7C3, M23C6, WHEREIN M IS THE METAL COMPONENT AND C IS THE CARBON COMPONENT OF THE CARBIDE.
Claim 3
Dependent Claim
52 words
The composition for making a steel alloy according to claim 1, wherein said additive is selected from the group consisting of iron (Fe) ranging from 0 to 30 percent, cobalt (Co) ranging from 0 to 2 percent, and nickel (Ni) ranging from 0 to 16 percent, all by weight of the carbides.
Claim 4
Dependent Claim
40 words
The composition for making a steel alloy according to claim 1, wherein said additive is selected from the group consisting of titanium (Ti), zirconium (Zr), and hafnium (Hf) present from 0 to 2 percent, all by weight of the carbides.
Claim 5
Dependent Claim
63 words
The composition for making a steel alloy according to claim 1, wherein said additive is selected from the group consisting of vanadium (Va), niobium (Nb), and tantalum (Ta), whereby the Va is present from 0 to 25 percent, the Nb is present from 0 to 10 percent, and the Ta is present from 0 to 20 percent, all by weight of the carbides.
Claim 6
Dependent Claim
41 words
The composition for making a steel alloy according to claim 1, wherein said additive is selected from the group consisting of chromium (Cr), molybdenum (Mo), and tungsten (W) all present from 0 to 25 percent, all by weight of the carbides.
Claim 7
Dependent Claim
28 words
The composition for making a steel alloy according to claim 1, wherein said additive comprises boron ranging from 0 to 25 percent, all by weight of the carbides.
Claim 8
Dependent Claim
28 words
The composition for making a steel alloy according to claim 1, further comprising carbon containing ferro-alloys ranging from 0 to 30 percent by weight of the total composition.
Claim 9
Dependent Claim
31 words
The composition for making a steel alloy according to claim 1, wherein said wholly or predominantly carbon deficient carbides range from 0.5 to 20 percent by weight of the total composition.
Claim 10
Dependent Claim
89 words
A composition for making a sintered steel alloy comprising a mixture of powdered steel alloy or alloys and carbides in powder form, said carbides being present from 0.5 to 50 percent by weight of the total composition, said carbides comprising an additive and wholly or predominantly carbon deficient carbides selected from the group consisting of chromium carbides, manganese carbides, and mixed carbides of chromium and manganese and including the structural types M3C, M7C3, M23C6, wherein M is the metal component and C is the carbon component of the carbide.
Claim 11
Dependent Claim
89 words
A composition for making a sintered steel alloy comprising a mixture of powdered steel alloy or alloys and carbides in powder form, said carbides being present from 0.5 to 50 percent by weight of the total composition, said carbides comprising an additive and wholly or predominantly carbon deficient carbides selected from the group consisting of chromium carbides, manganese carbides, and mixed carbides of chromium and manganese and including the structural types M3C, M7C3, M23C6, wherein M is the metal component and C is the carbon component of the carbide.
Claim 12
Dependent Claim
52 words
The composition for making a steel alloy according to claim 9, wherein said additive is selected from the group consisting of iron (Fe) ranging from 0 to 30 percent, cobalt (CO) ranging from 0 to 2 percent, and nickel (Ni) ranging from 0 to 16 percent, all by weight of the carbides.
Claim 13
Dependent Claim
40 words
The composition for making a steel alloy according to claim 9, wherein said additive is selected from the group consisting of titanium (Ti), zirconium (Zr), and hafnium (Hf) present from 0 to 2 percent, all by weight of the carbides.
Claim 14
Dependent Claim
63 words
The composition for making a steel alloy according to claim 9, wherein said additive is selected from the group consisting of vanadium (Va), niobium (Nb), and tantalum (Ta), whereby the Va is present from 0 to 25 percent, the Nb is present from 0 to 10 percent, and the Ta is present from 0 to 20 percent, all by weight of the carbides.
Claim 15
Dependent Claim
41 words
The composition for making a steel alloy according to claim 9, wherein said additive is selected from the group consisting of chromium (Cr), molybdenum (Mo), and tungsten (W) all present from 0 to 25 percent, all by weight of the carbides.
Claim 16
Dependent Claim
28 words
The composition for making a steel alloy according to claim 9, wherein said additive comprises boron ranging from 0 to 25 percent, all by weight of the carbides.
Claim 17
Dependent Claim
28 words
The composition for making a steel alloy according to claim 9, further comprising carbon containing ferro-alloys ranging from 0 to 30 percent by weight of the total composition.
Claim 18
Dependent Claim
31 words
The composition for making a steel alloy according to claim 9, wherein said wholly or predominantly carbon deficient carbides range from 0.5 to 20 percent by weight of the total composition.
Claim 19
Dependent Claim
87 words
A powder composition for making a sintered steel alloy comprising a mixture of iron powders, and alloying components including carbides in powder form, said carbides being present from 0.5 to 50 percent by weight of the total composition, said carbides comprising wholly or predominantly carbon deficient carbides selected from the group consisting of chromium carbides, manganese carbides, and mixed carbides of chromium and manganese and including the structural types M3C, M7C3, M23C6, wherein M is the metal component and C is the carbon component of the carbide.
Claim 20
Dependent Claim
87 words
A powder composition for making a sintered steel alloy comprising a mixture of iron powders, and alloying components including carbides in powder form, said carbides being present from 0.5 to 50 percent by weight of the total composition, said carbides comprising wholly or predominantly carbon deficient carbides selected from the group consisting of chromium carbides, manganese carbides, and mixed carbides of chromium and manganese and including the structural types M3C, M7C3, M23C6, wherein M is the metal component and C is the carbon component of the carbide.
Claim 21
Dependent Claim
86 words
A composition for making a sintered steel alloy comprising a mixture of powdered steel alloy or alloys and carbides in powder form, said carbides being present from 0.5 to 50 percent by weight of the total composition, said carbides comprising wholly or predominantly carbon deficient carbides selected from the group consisting of chromium carbides, manganese carbides, and mixed carbides of chromium and manganese and including the structural types M3C, M7C3, M23C6, wherein M is the metal component and C is the carbon component of the carbide.
Claim 22
Dependent Claim
86 words
A composition for making a sintered steel alloy comprising a mixture of powdered steel alloy or alloys and carbides in powder form, said carbides being present from 0.5 to 50 percent by weight of the total composition, said carbides comprising wholly or predominantly carbon deficient carbides selected from the group consisting of chromium carbides, manganese carbides, and mixed carbides of chromium and manganese and including the structural types M3C, M7C3, M23C6, wherein M is the metal component and C is the carbon component of the carbide.
References Cited (Backward Citations)
DE2000257B1
Cited
DE2008197B1
Cited
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 |