US4743311A
Expired / Lapsed
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Method of producing a metallic part
Assignee: Siemens AG
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Filing: 1986-08-08
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Granted: 1988-05-10
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Expires: 2006-08-08
Abstract
Abstract A metal part, which may be an amorphous metal, is formed from an intermediate product comprised of at least two alloy components in powder form which have been compacted and optionally deformed such as by hammering or extrusion. The intermediate part is transformed into the metal part by a diffusion reaction. The intermediate product is produced by milling the at least two starting alloy components to form a mixture powder of particles having a predominantly layer-like structure comprising the starting alloy components. At least one of the starting alloy components is magnetic. After milling, the produced mixture powder is subjected to a magnetic field which aligns the still mobile powder particles. Thereafter, the final compacting and possible deformation takes place.
Inventors
- 👤 Ludwig Schultz
- 👤 Karl Wohlleben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:28
CPC Classifications
H; H01; H01F; H01F1/00; H01F1/01; H01F1/03; H01F1/032; H01F1/04; H01F1/06; H01F1/08; B; B22; B22F; B22F3/00; B22F3/006; B22F3/007; B22F3/12; B22F9/00; B22F9/02; B22F9/04; B22F2009/041
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
248 words
In a method for manufacturing a metallic part including the steps of: forming an intermediate product of at least a first alloy component in powder form and of a second alloy component in powder form wherein at least one of said first and second alloy components has magnetic properties and wherein each alloy component in the intermediate product has at least one dimension of not greater than about 1 um in extent, wherein said step of forming said intermediate product includes a compacting step; and transforming the intermediate product into a metal alloy part by a diffusion reaction at a predetermined elevated temperature; the improvement comprising: producing a crystalline mixture powder by milling a mixture of at least said first alloy component powder and said second alloy component powder and terminating the milling at a time at which the particles of the produced mixture powder are formed of a predominantly layer-like structure of the alloy components each layer of said layer-like structure having a thickness of said dimension of not greater than 1 μm; thereafter subjecting the produced particles of the mixture powder to a magnetic field at a time when the powder particles have mobility thereby aligning the powder particles by said magnetic field with the direction of said magnetic field coinciding with the direction of said compacting; ultimately effecting said compacting step by compacting and deforming the produced mixture powder of particles aligned by said magnetic field to form said intermediate product having a predetermined shape.
Claim 2
Dependent Claim
248 words
In a method for manufacturing a metallic part including the steps of: forming an intermediate product of at least a first alloy component in powder form and of a second alloy component in powder form wherein at least one of said first and second alloy components has magnetic properties and wherein each alloy component in the intermediate product has at least one dimension of not greater than about 1 um in extent, wherein said step of forming said intermediate product includes a compacting step; and transforming the intermediate product into a metal alloy part by a diffusion reaction at a predetermined elevated temperature; the improvement comprising: producing a crystalline mixture powder by milling a mixture of at least said first alloy component powder and said second alloy component powder and terminating the milling at a time at which the particles of the produced mixture powder are formed of a predominantly layer-like structure of the alloy components each layer of said layer-like structure having a thickness of said dimension of not greater than 1 μm; thereafter subjecting the produced particles of the mixture powder to a magnetic field at a time when the powder particles have mobility thereby aligning the powder particles by said magnetic field with the direction of said magnetic field coinciding with the direction of said compacting; ultimately effecting said compacting step by compacting and deforming the produced mixture powder of particles aligned by said magnetic field to form said intermediate product having a predetermined shape.
Claim 3
Dependent Claim
17 words
A method according to claim 1 wherein said intermediate product is produced by a further deformation step.
Claim 4
Dependent Claim
20 words
A method according to claim 1 wherein said metal alloy part produced by said diffusion reaction has an amorphous structure.
Claim 5
Dependent Claim
20 words
A method according to claim 2 wherein said metal alloy part produced by said diffusion reaction has an amorphous structure.
Claim 6
Dependent Claim
25 words
A method according to claim 1 wherein the termination time of milling is determined by sectional examination of the particles of the produced mixture powder.
Claim 7
Dependent Claim
16 words
A method according to claim 1 wherein the milling takes place under a protective gas atmosphere.
Claim 8
Dependent Claim
17 words
A method according to claim 1 wherein the milling takes place at least at one predetermined temperature.
Claim 9
Dependent Claim
24 words
A method according to claim 1 wherein said predominantly layer-like structures each have a thickness of from about 0.01 μm to about 0.9 μm.
Claim 10
Dependent Claim
24 words
A method according to claim 8 wherein said predominantly layer-like structures each have a thickness of from about 0.05 μm to about 0.5 μm.
Claim 11
Dependent Claim
24 words
A method according to claim 1 wherein said particles of said produced mixture powder have diameters from about 10 μm to about 200 μm.
Claim 12
Dependent Claim
24 words
A method according to claim 10 wherein said particles of said produced mixture powder have diameters from about 20 μm to about 100 μm.
Claim 13
Dependent Claim
20 words
A method according to claim 1 wherein said magnetic field has a strength between about 0.1 to about 1 Tesla.
Claim 14
Dependent Claim
25 words
A method according to claim 1 wherein said produced mixture powder is subjected to a shaking or knocking treatment when said magnetic field is applied.
Claim 15
Dependent Claim
19 words
A method according to claim 1 wherein said produced mixture powder is deformed into said intermediate product by hammering.
Claim 16
Dependent Claim
19 words
A method according to claim 1 wherein said produced mixture powder is deformed into said intermediate product by extrusion.
Claim 17
Dependent Claim
16 words
A method according to claim 1 wherein said diffusion reaction takes place after the last compacting.
Claim 18
Dependent Claim
17 words
A method according to claim 2 wherein said diffusion reaction takes place after a last deformation step.
Claim 19
Dependent Claim
17 words
A method according to claim 1 wherein said diffusion reaction is performed simultaneously with the last compacting.
Claim 20
Dependent Claim
17 words
A method according to claim 2 wherein said diffusion reaction is performed simultaneously with the last deformation.
Claim 21
Dependent Claim
38 words
A method according to claim 1 wherein two magnetic alloy components having different Curie temperatures are provided and said aligning of the powder particles by said magnetic field takes place at a temperature intermediate said different Curie temperatures.
Claim 22
Dependent Claim
25 words
A method according to claim 1 wherein a non-crystallyne, structure of said intermediate product is transformed to a microcrystalline structure by a predetermined annealing step.
Claim 23
Dependent Claim
19 words
A method according to claim 1 wherein said intermediate product is formed from at least two crystalline alloy components.
Claim 24
Dependent Claim
23 words
A method according to claim 1 wherein at least one alloy component is metallic and at least another alloy component is a metalloid.
Claim 25
Dependent Claim
14 words
A method according to claim 23 wherein said metalloid alloy component is amorphous boron.
Claim 26
Dependent Claim
18 words
A method according to claim 1 wherein the intermediate product is formed from at least three alloy components.
Claim 27
Dependent Claim
28 words
A method according to claim 1 wherein at least one of the alloy components forming the intermediate product is a compound or alloy comprised of several chemical elements.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1991-05-10 | 1991-11-09 | 1992-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-05-10 | 1995-11-09 | 1996-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-05-10 | 1999-11-09 | 2000-05-10 | $7700.00 | Window Closed / Lapsed |