US3160501A - Tungsten-rhenium-tantalum alloys - Google Patents
Tungsten-rhenium-tantalum alloys Download PDFInfo
- Publication number
- US3160501A US3160501A US138531A US13853161A US3160501A US 3160501 A US3160501 A US 3160501A US 138531 A US138531 A US 138531A US 13853161 A US13853161 A US 13853161A US 3160501 A US3160501 A US 3160501A
- Authority
- US
- United States
- Prior art keywords
- tungsten
- rhenium
- alloys
- tantalum
- weight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- VXYAXARSCYHTTI-UHFFFAOYSA-N [Ta].[Re].[W] Chemical compound [Ta].[Re].[W] VXYAXARSCYHTTI-UHFFFAOYSA-N 0.000 title description 2
- 229910001362 Ta alloys Inorganic materials 0.000 title 1
- 229910045601 alloy Inorganic materials 0.000 claims description 22
- 239000000956 alloy Substances 0.000 claims description 22
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 20
- 229910052721 tungsten Inorganic materials 0.000 claims description 20
- 239000010937 tungsten Substances 0.000 claims description 20
- 229910052715 tantalum Inorganic materials 0.000 claims description 11
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 11
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 11
- 229910052702 rhenium Inorganic materials 0.000 description 10
- 238000002844 melting Methods 0.000 description 5
- 230000008018 melting Effects 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910000691 Re alloy Inorganic materials 0.000 description 2
- 229910001080 W alloy Inorganic materials 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 1
- 229910002056 binary alloy Inorganic materials 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000005339 levitation Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- XGZGDYQRJKMWNM-UHFFFAOYSA-N tantalum tungsten Chemical compound [Ta][W][Ta] XGZGDYQRJKMWNM-UHFFFAOYSA-N 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/04—Alloys based on tungsten or molybdenum
Definitions
- the present invention relates to tungsten base alloys suitable for use where high strength at elevated temperatures and low temperature ductility is required.
- Fabricable alloys possessing a relatively low ductile to brittle transition temperature and having a high strength at extremely high temperatures have many industrial and military applications, and it is generally recognized that future developments in many fields are closely tied to the availability of new and improved alloys possessing these properties. For example, the development of improved rocket nozzles and blades for gas turbines is dependent upon the availability of such alloys. Also, the alloys should prove to be very valuable for lamp and tube applications.
- the object of this invention is to provide workable alloys which possess a relatively good ductility both at room temperature and at sub-zero temperatures and which possess high strength at elevated temperatures, comprising predetermined proportions of tantalum, and rhenium, the balance, over 50% by weight being tungsten with small amounts of incidental impurities.
- the single figure is a graph setting forth the hardness of tungsten-tantalum-rhenium alloys as a function of temperature.
- ternary tungsten base alloys have been produced comprising from 1 to by weight of rhenium, from 1 to 10% by weight tantalum, and the balance being tungsten, with small amounts of incidental impurities.
- the alloys are characterized by high mechanical strength at elevated temperatures, low temperature ductility and the ability to be easily wrought to shape by hot or Warm working.
- the alloys of this invention comprise from 2 to 8% by weight rhenium, from 2 to 8% by Weight tantalum, and the balance being tungsten, with small amounts of incidental impurities.
- the alloy may be melted by a one of several procedures which will insure homogeneity and a minimum of contamination.
- unalloyed, high purity, tungsten together with proper amounts of pure tantalum and rhenium in powder form may be pressed into a bar or electrode and may be consumably arc melted preferably in a vacuum, though an inert gas atmosphere of argon, may be employed.
- the resulting ingot may be vacuum remelted several times to achieve homogeneity, then the resulting ingot may be hot worked to the desired shape;
- the alloy may also be prepared by levitation melting of a ball or rod of the alloy, using induction heating and levitating coils. Electron beam melting and non-consumable arc melting of the alloys is also satisfactory.
- a group of alloys comprising tungsten, tantalum and rhenium within the limits set forth herein were prepared by non-consumable arc melting in a vacuum of an absolute pressure of below 25 microns. Samples of the resulting ingots were tested for hardness at dilierent temperatures ranging from 240 F. to 2000 F. The results of these tests are indicated in Table I wherein percentages given for the compositions are by weight and the hardness values are diamond pyramid hardness (DPH).
- the alloys described herein may be hot worked or wrought to shape and, in some instances they may be cold worked. 7
- a tungsten base alloy consisting essentially of, by weight, 1 to 10% rhenium, 1 to 10% tantalum and the balance tungsten.
- a tungsten base alloy consisting essentially of by weight, 2 to 8% rhenium, 2to 8% tantalum and the balance tungsten.
- a tungsten base alloy consisting essentially of by weight, 8% rhenium, 4% tantalum and the balance tungsten.
Description
w Jig" United States Patent 3 160 50-1 rUNosrEN-nnENrUa rhANTALUM ALLOYS Lee S. Richardson, Monroeviile, Pa, Allen I. Lewis, de-
ceased, late of Forest Hills, Pa, by Bernard .1. Am-
brose, administrator, Monroevilie, and Leonard L.
France, Mount Lebanon, Pa, assignors to Westinghouse Electric Corporation, East Pittsburgh, Pa., a corporation of Pennsylvania Filed Sept. 15, 1961, Ser. No. 138,531 3 Claims. (Q1. 75-176) The present invention relates to tungsten base alloys suitable for use where high strength at elevated temperatures and low temperature ductility is required.
Fabricable alloys possessing a relatively low ductile to brittle transition temperature and having a high strength at extremely high temperatures have many industrial and military applications, and it is generally recognized that future developments in many fields are closely tied to the availability of new and improved alloys possessing these properties. For example, the development of improved rocket nozzles and blades for gas turbines is dependent upon the availability of such alloys. Also, the alloys should prove to be very valuable for lamp and tube applications.
In accordance with this invention it has been found that workable alloys possessing high strength at temperatures above 2000 F. can be produced by alloying tungsten, tantalum and rhenium in certain proportions.
Therefore, the object of this invention is to provide workable alloys which possess a relatively good ductility both at room temperature and at sub-zero temperatures and which possess high strength at elevated temperatures, comprising predetermined proportions of tantalum, and rhenium, the balance, over 50% by weight being tungsten with small amounts of incidental impurities.
Other objects of the invention will, in part, be obvious and will, in part, appear hereinafter.
The single figure is a graph setting forth the hardness of tungsten-tantalum-rhenium alloys as a function of temperature.
In accordance with the present invention ternary tungsten base alloys have been produced comprising from 1 to by weight of rhenium, from 1 to 10% by weight tantalum, and the balance being tungsten, with small amounts of incidental impurities. The alloys are characterized by high mechanical strength at elevated temperatures, low temperature ductility and the ability to be easily wrought to shape by hot or Warm working. In a preferred embodiment, the alloys of this invention comprise from 2 to 8% by weight rhenium, from 2 to 8% by Weight tantalum, and the balance being tungsten, with small amounts of incidental impurities.
The alloy may be melted by a one of several procedures which will insure homogeneity and a minimum of contamination. For example, unalloyed, high purity, tungsten together with proper amounts of pure tantalum and rhenium in powder form may be pressed into a bar or electrode and may be consumably arc melted preferably in a vacuum, though an inert gas atmosphere of argon, may be employed. The resulting ingot may be vacuum remelted several times to achieve homogeneity, then the resulting ingot may be hot worked to the desired shape; The alloy may also be prepared by levitation melting of a ball or rod of the alloy, using induction heating and levitating coils. Electron beam melting and non-consumable arc melting of the alloys is also satisfactory.
The following example is illustrative of the present invention. A group of alloys comprising tungsten, tantalum and rhenium within the limits set forth herein were prepared by non-consumable arc melting in a vacuum of an absolute pressure of below 25 microns. Samples of the resulting ingots were tested for hardness at dilierent temperatures ranging from 240 F. to 2000 F. The results of these tests are indicated in Table I wherein percentages given for the compositions are by weight and the hardness values are diamond pyramid hardness (DPH).
The alloys described herein may be hot worked or wrought to shape and, in some instances they may be cold worked. 7
Referring to the figure, there is shown a graphical comparison of two of the alloys selected from Table I with pure tungsten and a binary alloy of tungsten and rhenium. It may be concluded therefrom that the addition of tantalum and rhenium to tungsten increases the hardness at elevated temperatures and causes an increase in mechanical strength thereby. On the other hand, at room temperature and below the hardness of the tungsten alloy decreases with increasing amounts of the alloying components thereby indicating a greater ductility than pure tungsten at these temperatures.
It will be understood that the above description is only exemplary and not in limitation of the invention.
We claim as our invention:
1. A tungsten base alloy consisting essentially of, by weight, 1 to 10% rhenium, 1 to 10% tantalum and the balance tungsten.
2. A tungsten base alloy consisting essentially of by weight, 2 to 8% rhenium, 2to 8% tantalum and the balance tungsten.
3. A tungsten base alloy consisting essentially of by weight, 8% rhenium, 4% tantalum and the balance tungsten.
References Cited in the file of this patent UNITED STATES PATENTS OTHER REFERENCES H. Braun et al.: Contribution to the Technology of the Tantalum-Tungsten Alloys, TF-5528, pages 2 and 10. (Reprint of: Plansee Proceedings, 1958, High-Melting Metals, pp. 264-276, Pergamon Press, 1959.)
Patented Dec. 8, 1964
Claims (1)
1. A TUNGSTEN BASE ALLOY CONSISTING ESSENTIALLY OF, BY WEIGHT, 1 TO 10% REHNIUM, 1 TO 10% TANTALUM AND THE BALANCE TUNGSTEN.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US138531A US3160501A (en) | 1961-09-15 | 1961-09-15 | Tungsten-rhenium-tantalum alloys |
| GB29369/62A GB947136A (en) | 1961-09-15 | 1962-07-31 | Tungsten base alloys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US138531A US3160501A (en) | 1961-09-15 | 1961-09-15 | Tungsten-rhenium-tantalum alloys |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US3160501A true US3160501A (en) | 1964-12-08 |
Family
ID=22482439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US138531A Expired - Lifetime US3160501A (en) | 1961-09-15 | 1961-09-15 | Tungsten-rhenium-tantalum alloys |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US3160501A (en) |
| GB (1) | GB947136A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3875444A (en) * | 1972-12-06 | 1975-04-01 | Philips Corp | Rotating x-ray anode having a target area made of a tungsten rhenium tantalum alloy |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2157936A (en) * | 1939-03-08 | 1939-05-09 | Mallory & Co Inc P R | Refractory metal compositions |
| US2157935A (en) * | 1938-12-16 | 1939-05-09 | Mallory & Co Inc P R | Refractory metal compositions |
| GB816135A (en) * | 1955-01-28 | 1959-07-08 | Ass Elect Ind | Workable alloys of molybdenum and tungsten containing rhenium |
| US2977225A (en) * | 1959-02-25 | 1961-03-28 | Union Carbide Corp | High-temperature alloys |
-
1961
- 1961-09-15 US US138531A patent/US3160501A/en not_active Expired - Lifetime
-
1962
- 1962-07-31 GB GB29369/62A patent/GB947136A/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2157935A (en) * | 1938-12-16 | 1939-05-09 | Mallory & Co Inc P R | Refractory metal compositions |
| US2157936A (en) * | 1939-03-08 | 1939-05-09 | Mallory & Co Inc P R | Refractory metal compositions |
| GB816135A (en) * | 1955-01-28 | 1959-07-08 | Ass Elect Ind | Workable alloys of molybdenum and tungsten containing rhenium |
| US2977225A (en) * | 1959-02-25 | 1961-03-28 | Union Carbide Corp | High-temperature alloys |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3875444A (en) * | 1972-12-06 | 1975-04-01 | Philips Corp | Rotating x-ray anode having a target area made of a tungsten rhenium tantalum alloy |
Also Published As
| Publication number | Publication date |
|---|---|
| GB947136A (en) | 1964-01-22 |
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