US4600446A
Expired / Lapsed
US
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Method for tempering and working high strength low ductile alloy
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1984-10-03
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Granted: 1986-07-15
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Expires: 2004-10-03
Abstract
Abstract A high strength low ductile alloy is formed in a desired shape with high accuracy by bundling a multiplicity of fine wires made of the high strength low ductile alloy, consolidating the bundle of fine wires into a prescribed shape thereby giving rise to a formed product wherein the interiors of the fine wires comprises aggregates of very fine grains resulting from primary recrystallization and subjecting the formed product to thermal treatment for grain growth at the temperature of secondary recrystallization whereby the very fine grains undergo grain growth.
Inventors
- 👤 Yasunori Torisaka
- 👤 Kiyoyuki Ohuchi
- 👤 Yoshinori Nakazawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:19
CPC Classifications
C; C21; C21D; C21D8/00; C30; C30B; C30B1/00; C30B1/02; C30B29/00; C30B29/10; C30B29/52
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
141 words
A method for tempering and working a high-strength, low ductile alloy, comprising the steps of: providing a plurality of fine wires, fabricated from said high-strength, low ductile alloy, such that the surface of each of said plurality of fine wires defines an obstacle region, to grain growth, oriented in the direction of the length of each of said fine wires; bundling said multiplicity of fine wires together; consolidating and forming said bundle of fine wires into a prescribed shape so as to fabricate a formed product; subjecting said formed product to thermal treatment at the temperature of primary recrystallization whereby the interior regions of said fine wires form aggregates of very fine grains; and subsequently subjecting said formed product to thermal treatment at the temperature of secondary recrystallization whereby said very fine grains are enabled to grow along said obstacle regions.
Claim 2
Independent Claim
141 words
A method for tempering and working a high-strength, low ductile alloy, comprising the steps of: providing a plurality of fine wires, fabricated from said high-strength, low ductile alloy, such that the surface of each of said plurality of fine wires defines an obstacle region, to grain growth, oriented in the direction of the length of each of said fine wires; bundling said multiplicity of fine wires together; consolidating and forming said bundle of fine wires into a prescribed shape so as to fabricate a formed product; subjecting said formed product to thermal treatment at the temperature of primary recrystallization whereby the interior regions of said fine wires form aggregates of very fine grains; and subsequently subjecting said formed product to thermal treatment at the temperature of secondary recrystallization whereby said very fine grains are enabled to grow along said obstacle regions.
Claim 3
Dependent Claim
21 words
A method according to claim 1, wherein said high strength low ductile alloy is a Ni, Mo, or Fe base alloy.
Claim 4
Dependent Claim
22 words
A method according to claim 1, wherein said fine wires possess a diameter in the range of several microns to 100 microns.
Claim 5
Dependent Claim
15 words
A method according to claim 3, said fine wires are fabricated by the melt method.
Claim 6
Dependent Claim
17 words
A method according to claim 3, wherein said fine wires are fabricated by the plastic working method.
Claim 7
Dependent Claim
43 words
A method as set forth in claim 4, wherein: said obstacle regions of said fine wires are defined by the MC carbide existing as a supersaturated solid solution within said low ductile alloy matrix and precipitated along said surfaces of said fine wires.
Claim 8
Dependent Claim
30 words
A method as set forth in claim 5, wherein: said obstacle regions of said fine wires are defined by a non-metallic inclusion deposited upon said surfaces of said fine wires.
Claim 9
Dependent Claim
18 words
A method as set forth in claim 1, wherein: said temperature of primary recrystallization is approximately 1150° C.
Claim 10
Dependent Claim
28 words
A method as set forth in claim 1, wherein: said thermal treatment of said formed product at said temperature of primary recrystallization is maintained for approximately one hour.
Claim 11
Dependent Claim
22 words
A method as set forth in claim 1, wherein: said temperature of secondary recrystallization is within the range of 1150° C.-1250° C.
Claim 12
Dependent Claim
35 words
A method as set forth in claim 1, wherein: said thermal treatment of said formed product as said temperature of secondary recrystallization is maintained for a period of time within the range of 1-15 hours.
Claim 13
Independent Claim
134 words
A method for tempering and working a high-strength low ductile alloy, comprising the steps of: providing a plurality of fine wires, fabricated from said high-strength, low ductile alloy, such that the surface of each of said plurality of fine wires defines an obstacle region, to grain growth, oriented in the direction of the length of each of said fine wires; subjecting said fine wires to a continuous thermal treatment up to and including the temperature of secondary recrystallization whereby aggregates of very fine grains, formed within the interior regions of said fine wires at the temperature of primary recrystallization, are enabled to grow along said obstacle regions; bundling said plurality of fine wires together; and consolidating and forming said bundle of fine wires into a prescribed shape so as to fabricate of formed product.
Claim 14
Independent Claim
134 words
A method for tempering and working a high-strength low ductile alloy, comprising the steps of: providing a plurality of fine wires, fabricated from said high-strength, low ductile alloy, such that the surface of each of said plurality of fine wires defines an obstacle region, to grain growth, oriented in the direction of the length of each of said fine wires; subjecting said fine wires to a continuous thermal treatment up to and including the temperature of secondary recrystallization whereby aggregates of very fine grains, formed within the interior regions of said fine wires at the temperature of primary recrystallization, are enabled to grow along said obstacle regions; bundling said plurality of fine wires together; and consolidating and forming said bundle of fine wires into a prescribed shape so as to fabricate of formed product.
Claim 15
Dependent Claim
21 words
A method according to claim 12, wherein said high strength low ductile alloy is a Ni, Mo, or Fe base alloy.
Claim 16
Dependent Claim
22 words
A method according to claim 12, wherein said fine wires possess a diameter in the range of several microns to 100 microns.
Claim 17
Dependent Claim
15 words
A method according to claim 14, said fine wires are fabricated by the melt method.
Claim 18
Dependent Claim
17 words
A method according to claim 14, wherein said fine wires are fabricated by the plastic working method.
Claim 19
Dependent Claim
43 words
A method as set forth in claim 15, wherein: said obstacle regions of said fine wires are defined by the MC carbide existing as a supersaturated solid solution within said low ductile alloy matrix and precipitated along said surfaces of said fine wires.
Claim 20
Dependent Claim
30 words
A method as set forth in claim 16, wherein: said obstacle regions of said fine wires are defined by a non-metallic inclusion deposited upon said surfaces of said fine wires.
Claim 21
Dependent Claim
18 words
A method as set forth in claim 12, wherein: said temperature of primary recrystallization is approximately 1150° C.
Claim 22
Dependent Claim
28 words
A method as set forth in claim 12, wherein: said thermal treatment of said fine wires at said temperature of primary recrystallization is maintained for approximately one hour.
Claim 23
Dependent Claim
22 words
A method as set forth in claim 12, wherein: said temperature of secondary recrystallization is within the range of 1150° C.-1250° C.
Claim 24
Dependent Claim
35 words
A method as set forth in claim 12, wherein: said thermal treatment of said fine wires at said temperature of secondary recrystallization is maintained for a period of time within the range of 1-15 hours.
Claim 25
Independent Claim
128 words
A method for tempering and working a high-strength, low ductile alloy, comprising the steps of: providing a plurality of fine wires, fabricated from said high-strength, low-ductile alloy, such that the surface of each of said plurality of fine wires defines an obstacle region, to grain growth, oriented in the direction of the length of each of said fine wires; subjecting each of said plurality of fine wires to thermal treatment at the temperature of primary recrystallization whereby the interior region of each of said fine wires forms an aggregate of very fine grains; and subsequently subjecting each of said plurality of fine wires to thermal treatment at the temperature of secondary recrystallization whereby said very fine grains of said wires are enabled to grow along said obstacle regions.
Claim 26
Independent Claim
128 words
A method for tempering and working a high-strength, low ductile alloy, comprising the steps of: providing a plurality of fine wires, fabricated from said high-strength, low-ductile alloy, such that the surface of each of said plurality of fine wires defines an obstacle region, to grain growth, oriented in the direction of the length of each of said fine wires; subjecting each of said plurality of fine wires to thermal treatment at the temperature of primary recrystallization whereby the interior region of each of said fine wires forms an aggregate of very fine grains; and subsequently subjecting each of said plurality of fine wires to thermal treatment at the temperature of secondary recrystallization whereby said very fine grains of said wires are enabled to grow along said obstacle regions.
References Cited (Backward Citations)
US4447946A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-14 | 1990-01-13 | 1990-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-14 | 1994-01-13 | 1994-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-14 | 1998-01-13 | 1998-07-15 | $7700.00 | Window Closed / Lapsed |