US4128420A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-strength iron-molybdenum-nickel-phosphorus containing sintered alloy
Assignee: Robert Bosch GmbH
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Filing: 1977-03-17
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Granted: 1978-12-05
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Expires: 1997-03-17
Abstract
Abstract To provide an alloy having high strength, toughness, and which is highly resistant to impact loading, the alloy has the following composition (all percentages by weight): 2-4.5 Mo, more than 2.5 to less than 3.5% Ni, more than 0.3 to less than 0.6% P, the rest iron; preferably, 3% Mo, 3% Ni, 0.45% P and the rest iron are used.
Inventors
- 👤 Friedrich J. Esper
- 👤 Robert Zeller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:15
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0264
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
78 words
A high strength sintered alloy consisting essentially of between about (i) 2% and 4.5% by weight molybdenum, (ii) more than 2.5% and less than 3.5% nickel, (iii) more than 0.3% and less than 0.6% phosphorus, and the balance iron, and having a tensile strength σ B ≧ 600 N/mm 2 ; ratio of yield to tensile strength σ S /σ B ≧ 0.65; elongation at rupture δ ≧ 7%; and toughness a b ≧ 50 Joule/cm 2 .
Claim 2
Dependent Claim
78 words
A high strength sintered alloy consisting essentially of between about (i) 2% and 4.5% by weight molybdenum, (ii) more than 2.5% and less than 3.5% nickel, (iii) more than 0.3% and less than 0.6% phosphorus, and the balance iron, and having a tensile strength σ B ≧ 600 N/mm 2 ; ratio of yield to tensile strength σ S /σ B ≧ 0.65; elongation at rupture δ ≧ 7%; and toughness a b ≧ 50 Joule/cm 2 .
Claim 3
Dependent Claim
9 words
The alloy of claim 1 containing about 3% nickel.
Claim 4
Dependent Claim
12 words
The alloy of claim 2 containing about 3% molybdenum, and 0.45% phosphorus.
Claim 5
Dependent Claim
13 words
The alloy of claim 1 containing about 3% nickel and about 0.45% phosphorous.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-12-04 | 1982-06-05 | 1982-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-04 | 1986-06-05 | 1986-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-04 | 1990-06-05 | 1990-12-05 | $7700.00 | Window Closed / Lapsed |