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US4359352A
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Nickel base superalloys which contain boron and have been processed by a rapid solidification process
Assignee: Marko Materials Inc
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Filing: 1979-11-19
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Granted: 1982-11-16
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Expires: 1999-11-19
Abstract
Abstract Nickel and iron-nickel base alloys are described together with a rapid solidification process used in the preparation thereof to provide materials useful in the fabrication of parts subject to high temperature operating conditions. The alloys include commercial nickel base superalloys to which a specified amount of boron is added.
Inventors
- 👤 Ranjan Ray
- 👤 Donald E. Polk
- 👤 Bill C. Giessen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:15
CPC Classifications
C; C22; C22C; C22C19/00; C22C19/03; C22C19/05; Y; Y10; Y10S; Y10S75/00; Y10S75/952
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
216 words
A nickel base alloy obtained by adding 0.4 to 1.7 wt% boron to an alloy having a composition represented by Ni Balance M a M' b T c , where M is at least one element selected from the group consisting of titanium, aluminum, columbium, and tantalum and mixtures thereof, M' is at least one element selected from the group consisting of chromium, cobalt, iron, tungsten and molybdenum and mixtures thereof, and T is at least one element selected from the group consisting of carbon, hafnium, zirconium, vanadium, manganese, silicon and magnesium and mixtures thereof, and where a, b and c are atomic percentages ranging from 7 to 20, 8 to 43 and 0.1 to 4, respectively, where the sum of a, b and c is less than 50, where the molybdenum and tungsten content combined is in the range of 0 to 15 at %, said alloy being prepared from the melt thereof by a rapid solidification process characterized by cooling rates in the range of about 10 5 and 10 7 °C./sec. said alloy consisting of an ultra fine grain structure having an average grain size of less than about 2 microns comprised predominately of a nickel rich solid solution phase having a face-centered cubic crystalline structure, said alloy having very low bend ductility.
Claim 2
Dependent Claim
216 words
A nickel base alloy obtained by adding 0.4 to 1.7 wt% boron to an alloy having a composition represented by Ni Balance M a M' b T c , where M is at least one element selected from the group consisting of titanium, aluminum, columbium, and tantalum and mixtures thereof, M' is at least one element selected from the group consisting of chromium, cobalt, iron, tungsten and molybdenum and mixtures thereof, and T is at least one element selected from the group consisting of carbon, hafnium, zirconium, vanadium, manganese, silicon and magnesium and mixtures thereof, and where a, b and c are atomic percentages ranging from 7 to 20, 8 to 43 and 0.1 to 4, respectively, where the sum of a, b and c is less than 50, where the molybdenum and tungsten content combined is in the range of 0 to 15 at %, said alloy being prepared from the melt thereof by a rapid solidification process characterized by cooling rates in the range of about 10 5 and 10 7 °C./sec. said alloy consisting of an ultra fine grain structure having an average grain size of less than about 2 microns comprised predominately of a nickel rich solid solution phase having a face-centered cubic crystalline structure, said alloy having very low bend ductility.
Claim 3
Dependent Claim
15 words
A nickel base alloy according to claim 1 wherein said alloy is in sheet form.
Claim 4
Dependent Claim
15 words
A nickel base alloy according to claim 1 wherein said alloy is in filament form.
Claim 5
Dependent Claim
15 words
A nickel base alloy according to claim 1 wherein said alloy is in powder form.
Claim 6
Dependent Claim
136 words
A nickel base alloy having the composition represented by the formula [Ni Balance Cr 6-20 Ti 0-6 Al 1-8 Cb 0-4 Ta 0-10 Mo 0-13 W 0-13 Co 0-25 Fe 0-20 C 0 .04-0.35 (Hf, Zr, V, Mn, Si, Mg) 0-4 ] 98 .3-99.6 B 0 .4-1.7, where the subscripts define weight percent and where the nickel is present at a level of more than 50 wt%, said alloy being prepared from the melt thereof by a rapid solidification process characterized by cooling rates on the order of about 10 5 to 10 7 °C./sec, said alloy consisting of an ultrafine grain structure having an average grain size of less than about 2 microns comprised predominately of a nickel rich solid solution phase having a face-centered cubic crystalline structure, said alloy having very low bend ductility.
Claim 7
Dependent Claim
136 words
A nickel base alloy having the composition represented by the formula [Ni Balance Cr 6-20 Ti 0-6 Al 1-8 Cb 0-4 Ta 0-10 Mo 0-13 W 0-13 Co 0-25 Fe 0-20 C 0 .04-0.35 (Hf, Zr, V, Mn, Si, Mg) 0-4 ] 98 .3-99.6 B 0 .4-1.7, where the subscripts define weight percent and where the nickel is present at a level of more than 50 wt%, said alloy being prepared from the melt thereof by a rapid solidification process characterized by cooling rates on the order of about 10 5 to 10 7 °C./sec, said alloy consisting of an ultrafine grain structure having an average grain size of less than about 2 microns comprised predominately of a nickel rich solid solution phase having a face-centered cubic crystalline structure, said alloy having very low bend ductility.
Claim 8
Dependent Claim
18 words
A nickel base alloy according to claim 5 wherein the boron content is between 0.8 to 1.25 wt%.
Claim 9
Dependent Claim
15 words
A nickel base alloy according to claim 5 wherein said alloy is in sheet form.
Claim 10
Dependent Claim
15 words
A nickel base alloy according to claim 5 wherein said alloy is in filament form.
Claim 11
Dependent Claim
15 words
A nickel base alloy according to claim 5 wherein said alloy is in powder form.
Claim 12
Dependent Claim
210 words
An iron-nickel base alloy obtained by adding 0.4-1.7 wt% boron to an alloy having a composition represented by Fe x Ni y M a M" b T c where M is at least one element selected from the group consisting of titanium, aluminum, columbium, and tantalum and mixtures thereof, M" is at least one element selected from the group consisting of chromium, cobalt, tungsten and molybdenum and mixtures thereof, and T is at least one element selected from the group consisting of carbon, hafnium, zirconium, vanadium, manganese, silicon and magnesium and mixtures thereof, where x, y, a, b and c are atomic percentages ranging from 20 to 65, 5 to 50, 7 to 20, 8 to 43 and 0.1 to 4, respectively, and where the sum of a, b and c is less than 50 and the molybdenum and tungsten content combined is in the range of 0 to 15 at%, said alloy being prepared from the melt thereof by a rapid solidification process characterized by cooling rates in the range of about 10 5 to 10 7 °C/sec. said alloy consisting of an ultrafine grain structure having an average grain size of less than about 2 microns comprised predominately of a solid solution phase having very low bend ductility.
Claim 13
Dependent Claim
210 words
An iron-nickel base alloy obtained by adding 0.4-1.7 wt% boron to an alloy having a composition represented by Fe x Ni y M a M" b T c where M is at least one element selected from the group consisting of titanium, aluminum, columbium, and tantalum and mixtures thereof, M" is at least one element selected from the group consisting of chromium, cobalt, tungsten and molybdenum and mixtures thereof, and T is at least one element selected from the group consisting of carbon, hafnium, zirconium, vanadium, manganese, silicon and magnesium and mixtures thereof, where x, y, a, b and c are atomic percentages ranging from 20 to 65, 5 to 50, 7 to 20, 8 to 43 and 0.1 to 4, respectively, and where the sum of a, b and c is less than 50 and the molybdenum and tungsten content combined is in the range of 0 to 15 at%, said alloy being prepared from the melt thereof by a rapid solidification process characterized by cooling rates in the range of about 10 5 to 10 7 °C/sec. said alloy consisting of an ultrafine grain structure having an average grain size of less than about 2 microns comprised predominately of a solid solution phase having very low bend ductility.
Claim 14
Dependent Claim
15 words
An iron-nickel base alloy according to claim 10 wherein said alloy is in sheet form.
Claim 15
Dependent Claim
15 words
An iron-nickel base alloy according to claim 10 wherein said alloy is in filament form.
Claim 16
Dependent Claim
15 words
An iron-nickel base alloy according to claim 10 wherein said alloy is in powder form.
Claim 17
Dependent Claim
63 words
An iron-nickel base alloy having the composition represented by the formula 98.3-99.6 B 0 .4-1.7 where the subscripts define weight percent and where the iron and nickel taken together comprise more than 50 wt% and where said alloy is characterized by a structure comprised of an iron-nickel rich matrix containing ultrafine borides having an average particle size of less than about 0.3 micron.
Claim 18
Dependent Claim
63 words
An iron-nickel base alloy having the composition represented by the formula 98.3-99.6 B 0 .4-1.7 where the subscripts define weight percent and where the iron and nickel taken together comprise more than 50 wt% and where said alloy is characterized by a structure comprised of an iron-nickel rich matrix containing ultrafine borides having an average particle size of less than about 0.3 micron.
Claim 19
Dependent Claim
68 words
The method of preparing a rapidly solidified alloy of claim 7 in powder form, comprising the steps of (a) making a melt of said alloy, (b) contacting said melt against a rapidly moving chill substrate to solidify said melt into one of the group consisting of sheet, filament and ribbon form, and, (c) mechanically comminuting said one of the group consisting of sheet, filament and ribbon into powder.
Claim 20
Dependent Claim
74 words
A nickel base alloy having the composition represented by the formula 98.3-99.6 B 0.4-1.7, where the subscripts define weight percent and where the nickel is present at a level of more than 50 wt%, said alloy being characterized by a structure comprised of a nickel rich matrix containing ultrafine borides having an average particle size of less than about 0.3 micron and a fine dispersion of an intermetallic Ni 3 (Ti, Al) base compound.
Claim 21
Dependent Claim
74 words
A nickel base alloy having the composition represented by the formula 98.3-99.6 B 0.4-1.7, where the subscripts define weight percent and where the nickel is present at a level of more than 50 wt%, said alloy being characterized by a structure comprised of a nickel rich matrix containing ultrafine borides having an average particle size of less than about 0.3 micron and a fine dispersion of an intermetallic Ni 3 (Ti, Al) base compound.
Claim 22
Dependent Claim
186 words
A nickel base alloy obtained by adding 0.4 to 1.7 wt% boron to an alloy having a composition represented by Ni Balance M a M' b T c , where M is at least one element selected from the group consisting of titanium, aluminum, columbium, and tantalum and mixtures thereof, M' is at least one element selected from the group consisting of chromium, cobalt, iron, tungsten and molybdenum and mixtures thereof, and T is at least one element selected from the group consisting of carbon, hafnium, zirconium vanadium, manganese, silicon and magnesium and mixtures thereof, and where a, b and c are atomic percentages ranging from 7 to 20, 8 to 43 and 0.1 to 4, respectively, where the sum of a, b and c is less than 50, where the molybdenum and tungsten content combined is in the range of 0 to 15 at %, said alloy being characterized by a structure comprised of a nickel rich matrix containing ultrafine borides having an average particle size of less than about 0.3 micron and a fine dispersion of an intermetallic Ni 3 (Ti, Al) base compound.
Claim 23
Dependent Claim
186 words
A nickel base alloy obtained by adding 0.4 to 1.7 wt% boron to an alloy having a composition represented by Ni Balance M a M' b T c , where M is at least one element selected from the group consisting of titanium, aluminum, columbium, and tantalum and mixtures thereof, M' is at least one element selected from the group consisting of chromium, cobalt, iron, tungsten and molybdenum and mixtures thereof, and T is at least one element selected from the group consisting of carbon, hafnium, zirconium vanadium, manganese, silicon and magnesium and mixtures thereof, and where a, b and c are atomic percentages ranging from 7 to 20, 8 to 43 and 0.1 to 4, respectively, where the sum of a, b and c is less than 50, where the molybdenum and tungsten content combined is in the range of 0 to 15 at %, said alloy being characterized by a structure comprised of a nickel rich matrix containing ultrafine borides having an average particle size of less than about 0.3 micron and a fine dispersion of an intermetallic Ni 3 (Ti, Al) base compound.
Claim 24
Dependent Claim
69 words
The method of preparing a rapidly solidified alloy of claim 10 in powder form, comprising the steps of (a) making a melt of said alloy, (b) contacting said melt against a rapidly moving chill substrate to solidify said melt into one of the group consisting of sheet, filament and ribbon form, and, (c) mechanically comminuting said one of the group consisting of sheet, filament and ribbon form into powder.
Claim 25
Dependent Claim
19 words
A nickel base alloy according to claim 16 wherein said alloy is in the form of a bulk part.
Claim 26
Dependent Claim
21 words
A nickel base alloy according to claim 17 wherein said alloy is in the form of a finished article of manufacture.
Claim 27
Dependent Claim
26 words
A nickel base alloy according to claim 17 in the form of a body having a minimum thickness of 1 mm measured in the shortest direction.
Claim 28
Dependent Claim
31 words
A nickel base alloy according to claim 16 wherein said boride particles are present in said alloy in the form of a dispersion inside the grains and along the grain boundaries.
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) | 1985-11-15 | 1986-05-17 | 1986-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-15 | 1990-05-17 | 1990-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-15 | 1994-05-17 | 1994-11-16 | $7700.00 | Window Closed / Lapsed |