US4168159A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed steels with phosphorus for improved cutting performance
Assignee: Latrobe Steel Co
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Filing: 1978-02-28
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Granted: 1979-09-18
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Expires: 1998-02-28
Abstract
Abstract A new high speed steel with improved cutting life is provided consisting essentially of about 0.7 to 1.6% carbon, about 0.2 to 1.0% silicon, about 0.2 to 0.8% manganese, up to about 0.2% sulphur, about 0.5 to about 20% tungsten, about 0.5 to about 10% molybdenum, about 0.5 to 5% chromium, about 0.5 to about 6% vanadium, up to about 10% cobalt, more than 0.03% to about 0.20% phosphorus, the balance iron with residual impurities in ordinary amounts.
Inventors
- 👤 Rene Schlatter
- 👤 David P. Hughes
- 👤 James Stepanic
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:58
CPC Classifications
C; C22; C22C; C22C38/00; C22C38/12; C22C38/18; C22C38/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
99 words
A high phosphorous high speed steel with improved cutting life consisting essentially of about 0.7 to 1.6% carbon, about 0.2 to 1.0% silicon, about 0.2 to 0.8% manganese, up to about 0.2% sulphur, about 0.5 to about 20% tungsten, about 0.5 to about 10% molybdenum, about 0.5% to 5% chromium, about 0.5 to about 6% vanadium, up to about 10% cobalt, sufficient phosphorous in the range more than 0.03% to about 0.20% phosphorous, to provide improved cutting tool life as compared with a like alloy having less than 0.03% phosphorous, the balance iron with residual impurities in ordinary amounts.
Claim 2
Dependent Claim
99 words
A high phosphorous high speed steel with improved cutting life consisting essentially of about 0.7 to 1.6% carbon, about 0.2 to 1.0% silicon, about 0.2 to 0.8% manganese, up to about 0.2% sulphur, about 0.5 to about 20% tungsten, about 0.5 to about 10% molybdenum, about 0.5% to 5% chromium, about 0.5 to about 6% vanadium, up to about 10% cobalt, sufficient phosphorous in the range more than 0.03% to about 0.20% phosphorous, to provide improved cutting tool life as compared with a like alloy having less than 0.03% phosphorous, the balance iron with residual impurities in ordinary amounts.
Claim 3
Dependent Claim
13 words
A high speed steel according to claim 1 having 0.04 to 0.09% phosphorus.
Claim 4
Dependent Claim
34 words
A high speed steel according to claim 1 consisting essentially of 0.83% carbon, 8.3% molybdenum, 3.5% chromium, 1.9% tungsten, 1.0% vanadium and 0.103% phosphorus and the balance iron with residual impurities in ordinary amounts.
Claim 5
Dependent Claim
38 words
A high speed steel as claimed in claim 1 consisting essentially of 0.80% carbon, 6.0% tungsten, 4.0% chomium, 4.8% molybdenum, 1.8% vanadium, phosphorus between about 0.066% and 0.104% and the balance iron with residual impurities in ordinary amounts.
Claim 6
Dependent Claim
38 words
A high speed steel according to claim 1 consisting essentially of 0.96% carbon, about 7.8% molybdenum, about 4.2% chromium, about 0.7% tungsten, about 1.9% vanadium, about 0.066% phosphorus and the balance iron with residual impurities in ordinary amounts.
Claim 7
Dependent Claim
116 words
A high speed cutting tool made of an alloy consisting essentially by weight of about 0.7 to 1.6% carbon, about 0.2 to about 1.0% silicon, about 0.2 to about 0.8% manganese, up to about 0.2% sulphur, about 0.5 to about 20% tungsten, about 0.5 to about 10% molybdenum, about 0.5 to about 5% chromium, about 0.5 to about 6% vanadium, up to about 10% cobalt, sufficient phosphorous in the range more than about 0.03% to about 0.20% phosphorous to provide improved cutting tool life as compared with a like tool having less than 0.03% phosphorous and the balance iron with residual impurities in ordinary amounts, said tool being characterized by improved tool life and cutting performance.
Claim 8
Dependent Claim
116 words
A high speed cutting tool made of an alloy consisting essentially by weight of about 0.7 to 1.6% carbon, about 0.2 to about 1.0% silicon, about 0.2 to about 0.8% manganese, up to about 0.2% sulphur, about 0.5 to about 20% tungsten, about 0.5 to about 10% molybdenum, about 0.5 to about 5% chromium, about 0.5 to about 6% vanadium, up to about 10% cobalt, sufficient phosphorous in the range more than about 0.03% to about 0.20% phosphorous to provide improved cutting tool life as compared with a like tool having less than 0.03% phosphorous and the balance iron with residual impurities in ordinary amounts, said tool being characterized by improved tool life and cutting performance.
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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) | 1982-09-17 | 1983-03-19 | 1983-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-17 | 1987-03-19 | 1987-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-17 | 1991-03-19 | 1991-09-18 | $7700.00 | Window Closed / Lapsed |