US5032190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet processing for ODS iron-base alloys
Assignee: Huntington Alloys Corp
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Filing: 1990-04-24
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Granted: 1991-07-16
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Expires: 2010-04-24
Abstract
Abstract The process of the invention provides an improved method for forming sheet of iron-base ODS alloys. Powder containing iron and a substantially uniformly distributed oxide dispersoid is hot compacted into a billet. The billet is hot rolled in a first direction to introduce a predetermined amount of cold work into said billet. The hot rolled billet is then cold rolled in a second direction substantially perpendicular to said first direction after the hot rolling to form the iron-base ODS sheet. The cold rolling also introduces a predetermined amount of cold work into the billet. Preferably, the hot rolling and cold rolling are balanced to produce substantially uniform properties in the transverse and longitudinal directions.
Inventors
- 👤 Francis S. Suarez
- 👤 James D. Vandevender
- 👤 Vernon L. Maynard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:36
CPC Classifications
C; C22; C22C; C22C33/00; C22C33/02; C22C33/0257; C22C33/0261; C21; C21D; C21D8/00; C21D8/02; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12486
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
85 words
A method for forming sheet of iron-base ODS alloys comprising: a) hot rolling a billet or iron-base ODS alloy in a first direction to a predetermined thickness to introduce a predetermined amount of work hardening into said billet; and b) cold rolling said work hardened metal of said billet in a second direction substantially perpendicular to said first direction after said hot rolling to form said iron-base ODS sheet of a predetermined thickness and to introduce a predetermined amount of cold work into said metal.
Claim 2
Independent Claim
85 words
A method for forming sheet of iron-base ODS alloys comprising: a) hot rolling a billet or iron-base ODS alloy in a first direction to a predetermined thickness to introduce a predetermined amount of work hardening into said billet; and b) cold rolling said work hardened metal of said billet in a second direction substantially perpendicular to said first direction after said hot rolling to form said iron-base ODS sheet of a predetermined thickness and to introduce a predetermined amount of cold work into said metal.
Claim 3
Dependent Claim
25 words
The method of claim 1 wherein said hot rolling and cold rolling are balanced to produce substantially uniform properties in the transverse and longitudinal directions.
Claim 4
Dependent Claim
28 words
The method of claim 1 including the additional step of (c) annealing said sheet of iron-base ODS alloy to reduce property directionality from previous rolling and relieve stress.
Claim 5
Dependent Claim
48 words
The method of claim 1 including the additional steps of (c) annealing said ODS sheet to increase ductility; (d) cold rolling said annealed sheet to break up oxide on said annealed sheet; and (e) pickling said cold rolled sheet to remove said oxide from said cold rolled sheet.
Claim 6
Dependent Claim
32 words
The method of claim 1 wherein pack rolling with protective layers is used during hot rolling to decrease the final thickness achievable during hot rolling and increase work hardening during hot rolling.
Claim 7
Dependent Claim
13 words
The method of claim 1 wherein said cold rolling is a continuous operation.
Claim 8
Independent Claim
103 words
A method for forming sheet of iron-base ODS alloys comprising: a) hot rolling a billet of iron-base ODS alloy in a first direction to a predetermined thickness to introduce a predetermined amount of work hardening into said billet; and b) cold rolling said work hardened metal of said billet in a second direction substantially perpendicular to said first direction after said hot rolling to form said iron-base ODS sheet of a predetermined thickness and to introduce a predetermined amount of cold work into said metal balanced to said hot rolling to produce substantially uniform properties in the transverse and longitudinal directions upon recrystallization.
Claim 9
Independent Claim
103 words
A method for forming sheet of iron-base ODS alloys comprising: a) hot rolling a billet of iron-base ODS alloy in a first direction to a predetermined thickness to introduce a predetermined amount of work hardening into said billet; and b) cold rolling said work hardened metal of said billet in a second direction substantially perpendicular to said first direction after said hot rolling to form said iron-base ODS sheet of a predetermined thickness and to introduce a predetermined amount of cold work into said metal balanced to said hot rolling to produce substantially uniform properties in the transverse and longitudinal directions upon recrystallization.
Claim 10
Dependent Claim
28 words
The method of claim 7 including the additional step of (c) annealing said sheet of iron-base ODS alloy to reduce property directionality from previous rolling and relieve stress.
Claim 11
Dependent Claim
48 words
The method of claim 7 including the additional steps of (c) annealing said ODS sheet to increase ductility; (d) cold rolling said annealed sheet to break up oxide on said annealed sheet; and (e) pickling said cold rolled sheet to remove said oxide from said cold rolled sheet.
Claim 12
Dependent Claim
32 words
The method of claim 7 wherein pack rolling with protective layers is used during hot rolling to decrease the final thickness achievable during hot rolling and increase work hardening during hot rolling.
Claim 13
Dependent Claim
17 words
The method of claim 7 wherein said iron-base ODS alloy contains chromium, aluminum, titanium and yttrium oxide.
Claim 14
Dependent Claim
12 words
The method of claim 10 wherein said protective layers are nickel sheets.
References Cited (Backward Citations)
US3992162A
Cited
US4075010A
Cited
US4318758A
Cited
US4244736A
Cited
US4462844A
Cited
US4537643A
Cited
US4531981A
Cited
US4655854A
Cited
US4559090A
Cited
US4732622A
Cited
US4871400A
Cited
US4885042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-07-15 | 1995-01-14 | 1995-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-07-15 | 1999-01-14 | 1999-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-07-15 | 2003-01-14 | 2003-07-16 | $7700.00 | Window Closed / Lapsed |