US3901661A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prealloyed steel powder for formation of structural parts by powder forging and powder forged article for structural parts
Assignee: Toyo Kohan Co Ltd
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Filing: 1973-10-31
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Granted: 1975-08-26
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Expires: 1993-10-31
Abstract
Abstract This invention provides a prealloyed steel powder for formation of structural parts by powder forging, which comprises up to 0.5% by weight of carbon, 0.8 to 5.0% by weight of copper, 0.1 to 0.7% by weight of molybdenum, 0.3 to 1.3% by weight of nickel, and up to 0.6% by weight of manganese. This prealloyed steel powder exhibits a good forgeability and is inexpensive, and it can give a powder forged article which is comparable or superior to structural wrought alloy articles manufactured from conventional wrought alloy steels in respect to heat treatability, carburizing, quench hardening properties and mechanical properties. This invention also includes a prealloyed steel powder which comprises up to 0.5% by weight of carbon, 0.8 to 5.0% by weight of copper, 0.1 to 0.7% by weight of molybdenum, and up to 0.6% by weight of manganese, the balance being iron and unavoidable impurities incorporated during the manufacturing process, and which exhibits excellent quench hardenability after powder forging.
Inventors
- 👤 Yoshikazu Kondo
- 👤 Tsuguo Kawamura
- 👤 Hiroshi Aoyama
- 👤 Tomoyoshi Araki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:03
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0264; Y; Y10; Y10S; Y10S75/00; Y10S75/95
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
76 words
A PREALLOYD STEEL POWDER FOR INFORMATION OF STRUCTURAL PARTS BY POWDER FORGING, WHICH CONSISTS ESSENTIALLY OF UP TO 0.5% BY WEIGHT OF CARBON, 0.8 TO 5.0% BY WEIGHT OF COPPER, 0.1 TO 0.7% BY WEIGHT OF MOLYBDENUM, 0.3 TO 1.3% BY WEIGHT OF NICKEL, AND UP TO 0.6% BY WEIGHT OF MANGANESE, THE BALANCE BEING IRON AND UNAVOILABLE IMPURITIES INCORPORATED DURING THE MANUFACTURING PROCESS, AND WHICH EXHIBITS QUENCH HARDENABILITY AND EXCELLENT MECHANICAL PROPERTIES AFTER POWDER FORGING.
Claim 2
Dependent Claim
76 words
A PREALLOYD STEEL POWDER FOR INFORMATION OF STRUCTURAL PARTS BY POWDER FORGING, WHICH CONSISTS ESSENTIALLY OF UP TO 0.5% BY WEIGHT OF CARBON, 0.8 TO 5.0% BY WEIGHT OF COPPER, 0.1 TO 0.7% BY WEIGHT OF MOLYBDENUM, 0.3 TO 1.3% BY WEIGHT OF NICKEL, AND UP TO 0.6% BY WEIGHT OF MANGANESE, THE BALANCE BEING IRON AND UNAVOILABLE IMPURITIES INCORPORATED DURING THE MANUFACTURING PROCESS, AND WHICH EXHIBITS QUENCH HARDENABILITY AND EXCELLENT MECHANICAL PROPERTIES AFTER POWDER FORGING.
Claim 3
Dependent Claim
20 words
A prealloyed steel powder set forth in claim 1, wherein the copper content is from 1.0 to 5.0% by weight.
Claim 4
Dependent Claim
59 words
A powder forged article for structural parts, which consists essentially of 0.1 to 0.5% by weight of carbon, 0.8 to 5.0% by weight of copper, 0.1 to 0.7% by weight of molybdenum, 0.3 to 1.3% by weight of nickel, and up to 0.6% by weight of manganese, the balance being iron and unavoidable impurities incorporated during the manufacturing process.
Claim 5
Dependent Claim
59 words
A powder forged article for structural parts, which consists essentially of 0.1 to 0.5% by weight of carbon, 0.8 to 5.0% by weight of copper, 0.1 to 0.7% by weight of molybdenum, 0.3 to 1.3% by weight of nickel, and up to 0.6% by weight of manganese, the balance being iron and unavoidable impurities incorporated during the manufacturing process.
Claim 6
Dependent Claim
20 words
A powder forged article set forth in claim 3, wherein the copper content is from 1.0 to 5.0% by weight.
Claim 7
Dependent Claim
19 words
A powder forged article set forth in claim 3, which has a density ranging from 7.60 to 7.93 g/cm3.
Claim 8
Dependent Claim
66 words
A prealloyed steel powder for formation of structural parts by powder forging, which consists essentially of up to 0.5% by weight of carbon, 0.8 to 5.0% by weight of copper, 0.1 to 0.7% by weight of molybdenum, and up to 0.6% by weight of manganese, the balance being iron and unavoidable impurities incorporated during the manufacturing process, and which exhibits excellent quench hardenability after powder forging.
Claim 9
Dependent Claim
66 words
A prealloyed steel powder for formation of structural parts by powder forging, which consists essentially of up to 0.5% by weight of carbon, 0.8 to 5.0% by weight of copper, 0.1 to 0.7% by weight of molybdenum, and up to 0.6% by weight of manganese, the balance being iron and unavoidable impurities incorporated during the manufacturing process, and which exhibits excellent quench hardenability after powder forging.
Claim 10
Dependent Claim
20 words
A prealloyed steel powder set forth in claim 6, wherein the copper content is from 1.0 to 5.0% by weight.
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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) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |