US4469514A
Expired / Lapsed
US
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Sintered high speed tool steel alloy composition
Assignee: Crucible Materials Corp
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Filing: 1974-10-08
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Granted: 1984-09-04
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Expires: 1994-10-08
Abstract
Abstract Fully dense consolidated powder alloys of iron, cobalt and/or nickel characterized by having an ultrafine microstructure exhibiting a substantially uniformly dispersed harding phase of particle size essentially less than 3 microns, are produced from prealloyed powders by rapidly quenching an atomized molten alloy charge and subjecting the solidified alloy powder particles to the step of hot consolidation to produce substantially fully dense metal stock directly from prealloyed powder.
Inventors
- 👤 Frederick C. Holtz, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:54
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0278; C22C33/0292; B; B22; B22F; B22F1/00; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/082; B22F2009/086; B22F2998/00; B22F2998/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
125 words
A consolidated integral high speed steel alloy body which is essentially fully dense formed of a hot worked super-saturated solid solution of an inherently alloying composition, said alloy body consisting essentially of a continuous metallurgical phase with a uniformly dispersed hard phase of minute dispersed hard phase particle sizes that are essentially entirely less than 3 microns, said alloying composition consisting essentially by weight of from about 0.5% to about 5.0% carbon, at least 10% of a hard phase-forming element selected from the group consisting of Cr, W, Mo, Ti, Ta, Cb, Zr, Hf, V and Al, and mixtures thereof, and the remainder base metal and incidental impurities, wherein said base metal is iron, and wherein the total amount of iron is at least 30%.
Claim 2
Dependent Claim
125 words
A consolidated integral high speed steel alloy body which is essentially fully dense formed of a hot worked super-saturated solid solution of an inherently alloying composition, said alloy body consisting essentially of a continuous metallurgical phase with a uniformly dispersed hard phase of minute dispersed hard phase particle sizes that are essentially entirely less than 3 microns, said alloying composition consisting essentially by weight of from about 0.5% to about 5.0% carbon, at least 10% of a hard phase-forming element selected from the group consisting of Cr, W, Mo, Ti, Ta, Cb, Zr, Hf, V and Al, and mixtures thereof, and the remainder base metal and incidental impurities, wherein said base metal is iron, and wherein the total amount of iron is at least 30%.
Claim 3
Dependent Claim
16 words
A high speed steel cutting tool made from an alloy body as defined in claim 1.
Claim 4
Dependent Claim
122 words
A consolidated integral high speed steel alloy body which is essentially fully dense formed by a hot worked super-saturated solid solution of an inherently alloying composition, said alloy body consisting essentially of a continuous metallurgical phase with a uniformly dispersed hard phase of minute dispersed hard phase particle sizes that are essentially entirely less than 3 microns, said alloying composition consisting essentially by weight of from about 0.8% to about 3.4% carbon, at least 10% of a hard phase-forming element selected from the group consisting of Cr, W, Mo, Ti, Ta, Cb and V, and mixtures thereof, and the remainder base metal and incidental impurities, wherein said base metal is iron, and wherein the total amount of iron is at least 30%.
Claim 5
Dependent Claim
122 words
A consolidated integral high speed steel alloy body which is essentially fully dense formed by a hot worked super-saturated solid solution of an inherently alloying composition, said alloy body consisting essentially of a continuous metallurgical phase with a uniformly dispersed hard phase of minute dispersed hard phase particle sizes that are essentially entirely less than 3 microns, said alloying composition consisting essentially by weight of from about 0.8% to about 3.4% carbon, at least 10% of a hard phase-forming element selected from the group consisting of Cr, W, Mo, Ti, Ta, Cb and V, and mixtures thereof, and the remainder base metal and incidental impurities, wherein said base metal is iron, and wherein the total amount of iron is at least 30%.
Claim 6
Dependent Claim
16 words
A high speed steel cutting tool made from an alloy body as defined in claim 3.
Claim 7
Dependent Claim
141 words
A consolidated integral high speed steel alloy body which is substantially fully dense as shown by an improved combination of transverse rupture strength and hardness in cutting tool applications, said body being formed of a hot worked super-saturated solid solution of an inherently alloying composition, said alloy body consisting essentially of a continuous metallurgical phase with a uniformly dispersed hard phase of minute dispersed hard phase particle sizes that are essentially entirely less than 3 microns, said alloying composition consisting essentially by weight of from about 0.8% to about 3.4% carbon, at least 10% of a hard phase-forming element selected from the group consisting of Cr, W, Mo, Ti, Ta, Cb, and V, and mixtures thereof, and the remainder base metal and incidental impurities, wherein said base metal is iron, and wherein the total amount of iron is at least 30%.
Claim 8
Dependent Claim
141 words
A consolidated integral high speed steel alloy body which is substantially fully dense as shown by an improved combination of transverse rupture strength and hardness in cutting tool applications, said body being formed of a hot worked super-saturated solid solution of an inherently alloying composition, said alloy body consisting essentially of a continuous metallurgical phase with a uniformly dispersed hard phase of minute dispersed hard phase particle sizes that are essentially entirely less than 3 microns, said alloying composition consisting essentially by weight of from about 0.8% to about 3.4% carbon, at least 10% of a hard phase-forming element selected from the group consisting of Cr, W, Mo, Ti, Ta, Cb, and V, and mixtures thereof, and the remainder base metal and incidental impurities, wherein said base metal is iron, and wherein the total amount of iron is at least 30%.
Claim 9
Dependent Claim
16 words
A high speed steel cutting tool made from an alloy body as defined in claim 5.
Claim 10
Dependent Claim
141 words
A consolidated integral high speed steel alloy body which is essentially fully dense as shown by an improved combination of transverse rupture strength and hardness in cutting tool applications, said body being formed of a hot worked super-saturated solid solution of an inherently alloying composition, said alloy body consisting essentially of a continuous metallurgical phase with a uniformly dispersed hard phase of minute dispersed hard phase particle sizes that are essentially entirely less than 3 microns, said alloying composition consisting essentially by weight of from about 0.8% to about 3.4% carbon, at least 10% of a hard phase-forming element selected from the group consisting of Cr, W, Mo, Ti, Ta, Cb, and V, and mixtures thereof, and the remainder base metal and incidental impurities, wherein said base metal is iron, and wherein the total amount of iron is at least 30%.
Claim 11
Dependent Claim
141 words
A consolidated integral high speed steel alloy body which is essentially fully dense as shown by an improved combination of transverse rupture strength and hardness in cutting tool applications, said body being formed of a hot worked super-saturated solid solution of an inherently alloying composition, said alloy body consisting essentially of a continuous metallurgical phase with a uniformly dispersed hard phase of minute dispersed hard phase particle sizes that are essentially entirely less than 3 microns, said alloying composition consisting essentially by weight of from about 0.8% to about 3.4% carbon, at least 10% of a hard phase-forming element selected from the group consisting of Cr, W, Mo, Ti, Ta, Cb, and V, and mixtures thereof, and the remainder base metal and incidental impurities, wherein said base metal is iron, and wherein the total amount of iron is at least 30%.
Claim 12
Dependent Claim
16 words
A high speed steel cutting tool made from an alloy body as defined in claim 7.
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US2855295A
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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) | 1987-09-04 | 1988-03-05 | 1988-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-04 | 1992-03-05 | 1992-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-04 | 1996-03-05 | 1996-09-04 | $7700.00 | Window Closed / Lapsed |