Patent US5447153A successfully refreshed from Google Patents.
Patent US4609526A successfully refreshed from Google Patents.
US4609526A
Expired / Lapsed
US
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Method for compacting alloy powder
Assignee: Crucible Materials Corp
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Filing: 1984-05-14
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Granted: 1986-09-02
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Expires: 2004-05-14
Abstract
Abstract A method for producing high speed, tool and die steel articles from prealloyed powders. The method comprises placing particles of a prealloyed steel composition from which the article is to be made in a deformable container, heating the container and particles and then passing the heated container through a forging box having a plurality of hammers evenly spaced around the container and adapted to extend and retract radially to impart a radial forging action to the container. The forging action is of a magnitude and duration to compact the particles to an essentially fully dense article. Preferably, there are four hammers arranged in two pairs with the hammer of each pair being opposed and adapted to extend and retract in unison.
Inventors
- 👤 Walter T. Haswell
- 👤 Charles F. Yolton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:14
CPC Classifications
B; B30; B30B; B30B11/00; B30B11/007; B22; B22F; B22F3/00; B22F3/17; B22F3/172
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
122 words
A method for producing high speed, tool and die steel articles from prealloyed, gas-atomized, substantially spherical particles of the steel from which said articles are to be made, said method comprising placing said particles in a deformable container, heating said particles within said container and passing said container with said heated particles therein along a feed path having an axis through a forging box having a plurality of hammers evenly spaced around said container and adapted to extend and retract radially with respect to said axis to impart a radial forging action to said container as said container passes through said forging box, said forging action being of a magnitude and duration to compact said particles to an essentially fully dense article.
Claim 2
Independent Claim
122 words
A method for producing high speed, tool and die steel articles from prealloyed, gas-atomized, substantially spherical particles of the steel from which said articles are to be made, said method comprising placing said particles in a deformable container, heating said particles within said container and passing said container with said heated particles therein along a feed path having an axis through a forging box having a plurality of hammers evenly spaced around said container and adapted to extend and retract radially with respect to said axis to impart a radial forging action to said container as said container passes through said forging box, said forging action being of a magnitude and duration to compact said particles to an essentially fully dense article.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein said particles are heated to a temperature above about 0.7 of the fusion temperature of said particles.
Claim 4
Dependent Claim
31 words
The method of claim 1 wherein said particles are heated to a temperature above about 0.7 of fusion temperature of said particles and below the temperature of fusion of said particles.
Claim 5
Dependent Claim
15 words
The method of claim 1 wherein said particles are not larger than about -16 mesh.
Claim 6
Independent Claim
120 words
A method for producing high speed, tool and die steel articles from prealloyed, gas-atomized, substantially spherical particles of the steel from which said articles are to be made, said method comprising placing said particles in a deformable container, heating said particles within said container and passing said container with said heated particles therein along a feed path having an axis through a forging box having four hammers evenly spaced around said container and adapted to extend and retract radially with respect to said axis to impart a radial forging action to said container as said container passes through said forging box, said forging action being of a magnitude and duration to compact said particles to an essentially fully dense article.
Claim 7
Independent Claim
120 words
A method for producing high speed, tool and die steel articles from prealloyed, gas-atomized, substantially spherical particles of the steel from which said articles are to be made, said method comprising placing said particles in a deformable container, heating said particles within said container and passing said container with said heated particles therein along a feed path having an axis through a forging box having four hammers evenly spaced around said container and adapted to extend and retract radially with respect to said axis to impart a radial forging action to said container as said container passes through said forging box, said forging action being of a magnitude and duration to compact said particles to an essentially fully dense article.
Claim 8
Dependent Claim
30 words
The method of claim 5 wherein said four hammers are arranged in two pairs with the hammers of each pair being opposed and adapted to extend and retract in unison.
Claim 9
Dependent Claim
23 words
The method of claim 6 wherein said particles are heated to a temperature above about 0.7 of the fusion temperature of said particles.
Claim 10
Dependent Claim
32 words
The method of claim 6 wherein said particles are heated to a temperature above about 0.7 of the fusion temperature of said particles and below the temperature of fusion of said particles.
Claim 11
Dependent Claim
15 words
The method of claim 6 wherein said particles are not larger than about -16 mesh.
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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) | 1989-09-01 | 1990-03-03 | 1990-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-09-01 | 1994-03-03 | 1994-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-09-01 | 1998-03-03 | 1998-09-02 | $7700.00 | Window Closed / Lapsed |