Patent US4098608A successfully refreshed from Google Patents.
US4098608A
Expired / Lapsed
US
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Metal powder compositions
Assignee: BSA Sintered Components Ltd
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Filing: 1976-11-08
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Granted: 1978-07-04
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Expires: 1996-11-08
Abstract
Abstract In a mixture of metal powders from which ferrous alloy articles may be made by the process of powder metallurgy, the mixture consisting of the following in percentages by weight; nickel, 0.5 to 4%, manganese, 0.5 to 6%, carbon (graphite), 0.05 to 1.5%, copper, if present, up to 5%, boron, if present, up to 0.4%, iron and usual impurities, balance to 100%, the improvement consisting in that the nickel and manganese are in the form of a powdered binary alloy having a nickel to manganese ratio by weight in the range 15 : 85 to 65 : 35 and all of said powdered alloy passes through a 400 mesh B.S.S. sieve.
Inventors
- 👤 Michael Thomas Matty
- 👤 Philip James Ridout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:13
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0264; C22C33/0207
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
113 words
In a mixture of metal powders from which ferrous alloy articles may be made by the process of powder metallurgy, the mixture consisting of the following in percentages by weight: ______________________________________
Nickel 0.5 to 4%
Manganese 0.5 to 6%
Carbon (graphite) 0.05 to 1.5%
Copper, if present Up to 5%
Boron, if present Up to 0.4%
Iron and usual impurities
Balance to 100%
______________________________________ the improvement consisting in that the nickel and manganese are in the form of a powdered binary alloy having a nickel to manganese ratio by weight in the range 15 : 85 to 65 : 35 and all of said powdered alloy passes through a 400 mesh B.S.S. sieve.
Claim 2
Dependent Claim
113 words
In a mixture of metal powders from which ferrous alloy articles may be made by the process of powder metallurgy, the mixture consisting of the following in percentages by weight: ______________________________________
Nickel 0.5 to 4%
Manganese 0.5 to 6%
Carbon (graphite) 0.05 to 1.5%
Copper, if present Up to 5%
Boron, if present Up to 0.4%
Iron and usual impurities
Balance to 100%
______________________________________ the improvement consisting in that the nickel and manganese are in the form of a powdered binary alloy having a nickel to manganese ratio by weight in the range 15 : 85 to 65 : 35 and all of said powdered alloy passes through a 400 mesh B.S.S. sieve.
Claim 3
Dependent Claim
34 words
The mixture according to claim 1, wherein the nickel, manganese and carbon are present in the following percentages by weight: ______________________________________
Nickel 1.4 to 2.8%
Manganese 2.1 to 3.9%
Carbon 1.05 to 1.5%.
______________________________________
Claim 4
Dependent Claim
31 words
The mixture according to claim 2, wherein said elements are present in the following percentages by weight: ______________________________________
Nickel 1.9 to 2.8%
Manganese 3.0 to 3.9%
Carbon 1.05 to 1.5%.
______________________________________
Claim 5
Dependent Claim
16 words
The mixture according to claim 3, wherein the carbon content is 1.3 to 1.5% by weight.
Claim 6
Dependent Claim
29 words
The mixture according to claim 1, wherein the nickel to manganese ratio in the binary alloy is in the range 20 : 80 to 55 : 45 by weight.
Claim 7
Dependent Claim
28 words
The mixture according to claim 5, wherein the said alloy is a continuous solubility alloy having a nickel to manganese ratio of about 40 : 60 by weight.
Claim 8
Dependent Claim
26 words
The mixture according to claim 1, wherein all of the components of the mixture other than the iron powder pass through a 300 mesh B.S.S. sieve.
Claim 9
Dependent Claim
41 words
The mixture according to claim 7, wherein the iron is a soft iron having particles all passing through a 100 mesh B.S.S. sieve with 75% passing through a 200 mesh B.S.S. sieve and 50% passing through a 300 mesh B.S.S. sieve.
Claim 10
Dependent Claim
30 words
The mixture according to claim 1, wherein the carbon is present in the form of micronised graphite with the carbon content of the mixture in the range 0.45 to 1.5%.
Claim 11
Dependent Claim
46 words
The mixture according to claim 1, wherein an amount of the iron content not exceeding 5% of the total mixture has been replaced by one or more elements which do not adversely affect the tensile strength and ductility of the resultant articles obtained by powder metallurgy.
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) | 1981-07-03 | 1982-01-02 | 1982-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-07-03 | 1986-01-02 | 1986-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-07-03 | 1990-01-02 | 1990-07-04 | $7700.00 | Window Closed / Lapsed |