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US4497669A
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Process for making alloys having coarse, elongated grain structure
Assignee: Huntington Alloys Corp
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Filing: 1983-07-22
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Granted: 1985-02-05
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Expires: 2003-07-22
Abstract
Abstract An alloy made by water atomizing the charge component into powder, extruding the powder, hot rolling the powder and heat treating the product. The alloy displays superior stress rupture characteristics when compared to a corresponding conventionally wrought alloy.
Inventors
- 👤 Kathy K. Wang
- 👤 Mark L. Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 10:25
CPC Classifications
F; F28; F28F; F28F21/00; F28F21/08; F28F21/081; F28F21/087; B; B22; B22F; B22F3/00; B22F3/12; B22F3/16; C; C22; C22C; C22C32/00; C22C32/001; C22C32/0015; C22C32/0026; C22F; C22F1/00; C22F1/10
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
60 words
A method of making alloys characterized by a coarse, elongated grain structure, the method comprising: (a) water atomizing a charge of components comprising the alloy to form powder, (b) extruding the powder to a predetermined product configuration, (c) hot rolling the product in a direction substantially parallel to the extrusion direction and, (d) annealing the product to permit recrystallization therein.
Claim 2
Independent Claim
60 words
A method of making alloys characterized by a coarse, elongated grain structure, the method comprising: (a) water atomizing a charge of components comprising the alloy to form powder, (b) extruding the powder to a predetermined product configuration, (c) hot rolling the product in a direction substantially parallel to the extrusion direction and, (d) annealing the product to permit recrystallization therein.
Claim 3
Dependent Claim
16 words
The method according to claim 1 wherein oxygen is introduced into the alloy during water atomization.
Claim 4
Dependent Claim
51 words
The method according to claim 1 wherein the alloy consists essentially of about 30-35% nickel, about 19-23% chromium, up to about 1.5% manganese, up to about 1% silicon, about 0.07-0.60% aluminum, about 0.14-0.6% titanium, about 0.27-0.38% oxygen, up to about 0.75% copper, up to about 0.036% yttrium, and the balance iron.
Claim 5
Dependent Claim
46 words
The method according to claim 3 wherein the alloy consists essentially of about 32.3-33.5% nickel, about 20.8-21.1% chronium, about 0.07-0.60% aluminum, about 0.15-0.19% titanium, about 0.50-0.83% manganese, about 0.25-0.42% silicon, about 0.068-0.10% carbon, about 0.27-0.38% oxygen, about 0.03-0.05% nitrogen, about 0.031-0.036% yttrium, and the balance iron.
Claim 6
Dependent Claim
34 words
The method according to claim 1 wherein the alloy consists essentially of about 20.5-23.0% chromium, about 17-20% iron, about 8-10% molybdenum, about 0.5-2.5% cobalt, about 0.05-0.20% carbon, about 0.2-1.0% tungsten, and the balance nickel.
Claim 7
Dependent Claim
27 words
The method according to claim 1 wherein oxides selected from the group consisting of alumina, manganese oxide, silicon oxide and titanium oxide are present in the alloy.
Claim 8
Dependent Claim
13 words
The method according to claim 1 wherein the extrusion ratio is about 8:1.
Claim 9
Dependent Claim
14 words
The method according to claim 1 wherein extrusion is conducted at about 1066° C.
Claim 10
Dependent Claim
15 words
The method according to claim 1 wherein hot rolling is conducted at about 788° C.
Claim 11
Dependent Claim
18 words
The method according to claim 1 wherein annealing is conducted at about 1316° C. for about 1/2 hour.
Claim 12
Dependent Claim
15 words
The method according to claim 1 wherein the product is cold rolled prior to annealing.
Claim 13
Dependent Claim
18 words
The method according to claim 1 wherein the alloy has a grain aspect ratio greater than about 1:1.
Claim 14
Dependent Claim
20 words
The method according to claim 12 wherein the alloy has a grain aspect ratio equal to or greater than 10:1.
Claim 15
Dependent Claim
23 words
The method according to claim 1 wherein two to six coarse, elongated grains appear across a 6.4 mm longitudinal section of the product.
Claim 16
Dependent Claim
10 words
An article of manufacture made in accordance with claim 1.
Claim 17
Dependent Claim
89 words
An alloy, the alloy comprising coarse, elongated grain structure, the grains having an aspect ratio greater than about 1:1, two to six coarse grains appearing across a 6.4 mm longitudinal section of the alloy, the alloy prepared by a method comprising the steps of: (a) water atomizing a charge of components comprising the alloy to form powder, (b) extruding the powder to a predetermined product configuration, (c) hot rolling the product in a direction substantially parallel to the extrusion direction and, (d) annealing the product to permit recrystallization therein.
Claim 18
Dependent Claim
89 words
An alloy, the alloy comprising coarse, elongated grain structure, the grains having an aspect ratio greater than about 1:1, two to six coarse grains appearing across a 6.4 mm longitudinal section of the alloy, the alloy prepared by a method comprising the steps of: (a) water atomizing a charge of components comprising the alloy to form powder, (b) extruding the powder to a predetermined product configuration, (c) hot rolling the product in a direction substantially parallel to the extrusion direction and, (d) annealing the product to permit recrystallization therein.
Claim 19
Dependent Claim
15 words
The alloy of claim 16 wherein oxygen is introduced into the alloy during water atomization.
Claim 20
Dependent Claim
50 words
The alloy of claim 16 wherein the alloy consists essentially of about 30-35% nickel, about 19-23% chromium, up to about 1.5% manganese, up to about 1% silicon, about 0.07-0.60% aluminum, about 0.14-0.6% titanium, about 0.27-0.38% oxygen, up to about 0.75% copper, up to about 0.036% yttrium and the balance iron.
Claim 21
Dependent Claim
45 words
The alloy of claim 18 wherein the alloy consists essentially of about 32.3-33.5% nickel, about 20.3-21.1% chromium, about 0.07-0.60% aluminum, about 0.15-0.19% titanium, about 0.50-0.83% manganese, about 0.25-0.42% silicon, about 0.068-0.10% carbon, about 0.27-0.38% oxygen, about 0.03-0.05% nitrogen, about 0.031-0.036% yttrium and the balance iron.
Claim 22
Dependent Claim
34 words
The alloy according to claim 16 wherein the alloy consists essentially of about 20.5-23.0% chromium, about 17-20% iron, about 8-10% molybdenum, about 0.5-2.5% cobalt, about 0.05-0.20% carbon, about 0.2-1.0% tungsten, and the balance nickel.
Claim 23
Dependent Claim
26 words
The alloy of claim 16 wherein oxides selected from the group consisting of alumina, manganese oxide, silicon oxide and titanium oxide are present in the superalloy.
Claim 24
Dependent Claim
13 words
The alloy according to claim 16 wherein the extrusion ratio is about 8:1.
Claim 25
Dependent Claim
14 words
The alloy according to claim 16 wherein extrusion is conducted at about 1066° C.
Claim 26
Dependent Claim
15 words
The alloy according to claim 16 wherein hot rolling is conducted at about 788° C.
Claim 27
Dependent Claim
18 words
The alloy according to claim 16 wherein annealing is conducted at about 1316° C. for about 1/2 hour.
Claim 28
Dependent Claim
15 words
The alloy according to claim 16 wherein the product is cold rolled prior to annealing.
Claim 29
Dependent Claim
20 words
The alloy according to claim 16 wherein the alloy has a grain aspect ratio equal to or greater than 10:1.
Claim 30
Dependent Claim
10 words
An article of manufacture made in accordance with claim 16.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-05 | 1988-08-06 | 1989-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-05 | 1992-08-06 | 1993-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-05 | 1996-08-06 | 1997-02-05 | $7700.00 | Window Closed / Lapsed |