US4013459A
Expired / Lapsed
US
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Oxidation resistant nickel base alloys
Assignee: Olin Corp
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Filing: 1975-10-24
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Granted: 1977-03-22
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Expires: 1995-10-24
Abstract
Abstract Improved oxidation resistant nickel base alloys, and processing thereof, consisting essentially of from 2 to 6% aluminum, from 0.5 to 4% silicon, from 0.001 to 0.5% of a material selected from the group consisting of the elements of the lanthanide series of the Periodic Table and mixtures thereof, preferably mischmetal, and the balance essentially nickel.
Inventors
- 👤 Mathur Raghavan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:51
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; C22C19/058
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
51 words
A nickel base alloy consisting essentially of from 2 to 6% aluminum, from 0.5 to 4% silicon, from 1 to 6% chromium, from 0.001 to 0.5% of a material selected from the group consisting of the elements of the lanthanide series of the Periodic Table and mixtures thereof, balance essentially nickel.
Claim 2
Dependent Claim
51 words
A nickel base alloy consisting essentially of from 2 to 6% aluminum, from 0.5 to 4% silicon, from 1 to 6% chromium, from 0.001 to 0.5% of a material selected from the group consisting of the elements of the lanthanide series of the Periodic Table and mixtures thereof, balance essentially nickel.
Claim 3
Dependent Claim
12 words
An alloy according to claim 1 wherein said lanthanide material is mischemetal.
Claim 4
Dependent Claim
12 words
An alloy according to claim 1 wherein said lanthanide material is cerium.
Claim 5
Dependent Claim
14 words
An alloy according to claim 1 including an addition from 0.001 to 0.4% manganese.
Claim 6
Dependent Claim
14 words
An alloy according to claim 1 including an addition from 0.001 to 0.1% magnesium.
Claim 7
Dependent Claim
27 words
An alloy according to claim 1 having high resistance to oxidation and sulfidation at elevated temperatures, good hot workability, good creep resistance and high creep rupture strength.
Claim 8
Dependent Claim
31 words
An alloy according to claim 1 containing from 3 to 5% aluminum, from 2 to 3.5% silicon, from 3 to 5% chromium and from 0.01 to 0.5% of said lanthanide material.
Claim 9
Independent Claim
100 words
A method of preparing a wrought nickel base alloy comprising: A. providing a nickel base alloy consisting essentially of from 2 to 6% aluminum, from 0.5 to 4% silicon, from 1 to 6% chromium, from 0.001 to 0.5% of a material selected from the group consisting of the elements of the lanthanide series of the Periodic Table and mixtures thereof, balance essentially nickel; B. hot rolling said alloy at a temperature of at least 1470° F; and C. cold rolling said alloy to desired gage with intermediate annealing at 1500° to 1900° F for from 5 seconds to 8 hours.
Claim 10
Independent Claim
100 words
A method of preparing a wrought nickel base alloy comprising: A. providing a nickel base alloy consisting essentially of from 2 to 6% aluminum, from 0.5 to 4% silicon, from 1 to 6% chromium, from 0.001 to 0.5% of a material selected from the group consisting of the elements of the lanthanide series of the Periodic Table and mixtures thereof, balance essentially nickel; B. hot rolling said alloy at a temperature of at least 1470° F; and C. cold rolling said alloy to desired gage with intermediate annealing at 1500° to 1900° F for from 5 seconds to 8 hours.
Claim 11
Dependent Claim
30 words
A method according to claim 8 wherein prior to hot rolling the alloy is homogenized at a temperature of from 1470° to 2100° F for 30 minutes to 24 hours.
Claim 12
Dependent Claim
10 words
An alloy according to claim 1 in the wrought form.
References Cited (Backward Citations)
US3744996A
Cited
US3810754A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-21 | 1980-09-20 | 1981-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-21 | 1984-09-20 | 1985-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-21 | 1988-09-20 | 1989-03-22 | $7700.00 | Window Closed / Lapsed |