US4355057A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of alloy powders through solid particle quenching
Assignee: RTX Corp
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Filing: 1981-03-02
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Granted: 1982-10-19
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Expires: 2001-03-02
Abstract
Abstract Methods and apparatus for manufacturng rapidly cooled powder particles is disclosed. Concepts discussed include both convection cooling and conduction cooling of molten material from which the particles are fabricated. By one effective technique of the present invention, seed particles are dropped across the path of a molten droplet stream causing impact and solidification of the molten droplets on the seed particles. Particles of increased size which are formed of conductively quenched material result.
Inventors
- 👤 Edward R. Slaughter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 14:56
CPC Classifications
B; B22; B22F; B22F9/00; B22F9/02; B22F9/06; B22F9/08; B22F9/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
114 words
A method for making rapidly quenched particles of metallic material, comprising the steps of: providing solid, small diameter particles of said metallic material; dispersing said particles in a ramdom array, falling freely through an annular space; atomizing within said annular space a melt of metallic material and directing said material into an essentially planar stream of tiny droplets having a size significantly smaller than said particle; traversing said tiny droplets in molten form radially across said annular space causing random collision of the droplets and the particles whereby each droplet in collision with one or more of said particles becomes solidified at least in part thereon to form coated solid particles of increased size.
Claim 2
Independent Claim
114 words
A method for making rapidly quenched particles of metallic material, comprising the steps of: providing solid, small diameter particles of said metallic material; dispersing said particles in a ramdom array, falling freely through an annular space; atomizing within said annular space a melt of metallic material and directing said material into an essentially planar stream of tiny droplets having a size significantly smaller than said particle; traversing said tiny droplets in molten form radially across said annular space causing random collision of the droplets and the particles whereby each droplet in collision with one or more of said particles becomes solidified at least in part thereon to form coated solid particles of increased size.
Claim 3
Dependent Claim
30 words
The method according to claim 1 wherein the step of atomizing the melt of metallic material includes the step of shearing said droplets from the rim of a rotating disk.
Claim 4
Dependent Claim
23 words
The method according to claim 2 wherein the molten droplets spreads on the surface of the solid particles before the molten droplets solidifies.
Claim 5
Dependent Claim
28 words
The method according to claim 3 including the step of imparting to said tiny droplets velocities on the order of three hundred fifty feet per second (350 fps).
References Cited (Backward Citations)
US3752611A
Cited
US3795504A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-10-18 | 1986-04-19 | 1986-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-10-18 | 1990-04-19 | 1990-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-10-18 | 1994-04-19 | 1994-10-19 | $7700.00 | Window Closed / Lapsed |