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US4626406A
Expired / Lapsed
US
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Activated sintering of metallic powders
Assignee: Huntington Alloys Corp
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Filing: 1985-10-28
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Granted: 1986-12-02
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Expires: 2005-10-28
Abstract
Abstract A method for consolidating powder utilizing slurry extrusion or rolling techniques. A metallic powder, binder and boron containing activator are mixed together to form a slurry. The slurry is introduced into an active forming apparatus whereupon it is formed into an object of predetermined shape and sintered.
Inventors
- 👤 Jon M. Poole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:08
CPC Classifications
B; B22; B22F; B22F3/00; B22F3/22; B22F3/227; B22F3/10; B22F3/1003; C; C22; C22C; C22C1/00; C22C1/04; C22C1/0433; B22F2998/00
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
59 words
A method for consolidating a product from metallic powder, the method comprising: (a) blending the powder with a binder and a boron containing activator to form a slurry, (b) introducing the slurry into an active forming apparatus to cause the formation of an object of predetermined shape, (c) removing the binder from the object, and (d) sintering the object.
Claim 2
Independent Claim
59 words
A method for consolidating a product from metallic powder, the method comprising: (a) blending the powder with a binder and a boron containing activator to form a slurry, (b) introducing the slurry into an active forming apparatus to cause the formation of an object of predetermined shape, (c) removing the binder from the object, and (d) sintering the object.
Claim 3
Dependent Claim
25 words
The method according to claim 1 wherein the activator is selected from the group consisting of dilute boric acid-water solution, nickel boride and lithium tetraborate.
Claim 4
Dependent Claim
15 words
The method according to claim 2 wherein the nickel boride is -80 mesh and smaller.
Claim 5
Dependent Claim
11 words
The method according to claim 1 wherein the slurry is extruded.
Claim 6
Dependent Claim
12 words
The method according to claim 1 where the slurry is cold rolled.
Claim 7
Dependent Claim
21 words
The method according to claim 1 wherein the sintering temperature is 85% of the melting point of the alloy or greater.
Claim 8
Dependent Claim
21 words
The method according to claim 1 wherein the density of the object is in excess of 5 grams per cubic centimeter.
Claim 9
Dependent Claim
23 words
The method according to claim 2 wherein up to about 5% boric acid-water solution is used as the activator for water atomized powder.
Claim 10
Dependent Claim
24 words
The method according to claim 2 wherein up to about a 1% boric acid-water solution is used as the activator for gas atomized powder.
Claim 11
Dependent Claim
24 words
The method according to claim 2 wherein up to about a 1% boric acid-water solution is used as the activator for water atomized powder.
Claim 12
Dependent Claim
20 words
The method according to claim 1 wherein the activator content ranges up to about 1.2% by weight of the powder.
Claim 13
Dependent Claim
23 words
The method according to claim 1 wherein additional nickel powder is added to the metallic powder prior to the formation of the slurry.
Claim 14
Dependent Claim
11 words
The method according to claim 1 wherein the powder is atomized.
Claim 15
Dependent Claim
11 words
The method according claim 1 wherein the metal powder includes nickel.
Claim 16
Dependent Claim
13 words
The method according to claim 1 wherein the activator is a metal borate.
Claim 17
Dependent Claim
16 words
The method according to claim 1 wherein the density of the object is 90% or greater.
Claim 18
Dependent Claim
21 words
The method according to claim 1 where the binder content ranges from about 1 to 4% by weight of the powder.
Claim 19
Dependent Claim
12 words
The method according the claim 1 where the binder is water soluble.
Claim 20
Dependent Claim
14 words
The method according to claim 1 where water is added to form the slurry.
Claim 21
Dependent Claim
21 words
The method according to claim 19 wherein the water content ranges from about 5 to 20% by weight of the powder.
References Cited (Backward Citations)
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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) | 1989-12-01 | 1990-06-02 | 1990-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-01 | 1994-06-02 | 1994-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-01 | 1998-06-02 | 1998-12-02 | $7700.00 | Window Closed / Lapsed |