US3116145A - Tungsten-hafnium alloy casting - Google Patents
Tungsten-hafnium alloy casting Download PDFInfo
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- US3116145A US3116145A US191305A US19130562A US3116145A US 3116145 A US3116145 A US 3116145A US 191305 A US191305 A US 191305A US 19130562 A US19130562 A US 19130562A US 3116145 A US3116145 A US 3116145A
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- tungsten
- hafnium
- carbon
- less
- oxygen
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- 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 alloys of the present invention are castings containing from 02% to 5% hafnium, up to .50% carbon.
- the balance consists essentially of tungsten except that small quantities of zirconium, tantalum, columbium or molybdenum may be present as optional ingredients.
- zirconium, tantalum and columbium may be present in amounts not exceeding a total of about 1% and molybdenum may be present in an amount not exceeding about Oxygen, even in the smallest amounts, is deleterious and hence must be less than 005% and preferably less than 001%.
- Highly useful alloys within the scope of the present invention include alloys containing .01% to .10% carbon. However, when carbon is present in amounts in the order of .01% or more, the hafnium content should not exceed about 1%. Larger quantities of hafnium, within the limits stated above, may be present in carbon free alloys or alloys containing less than .01% carbon.
- the alloys of the present invention may be prepared by arc-melting in vacuum, preferably using a furnace of the type disclosed in the United States Patent 2,656,743.
- deoxidizing the melt is by adding carbon to the charge to react with any oxygen present in raw materials and in quantities which will leave the desired excess in the final casting.
- the absolute pressure during the melting operation is preferably maintained below 50 microns of mercury.
- the alloys of the present invention may be forged or Worked at temperatures in the neighborhood of 3600 F. to 4000 F.
Description
United States Patent 3,116,145 TUNGSTEN-HAFNIUM ALLOY CASTING M'arion Sernchyshen, Dearborn, Mich, assignor to American h fetal Uimax, Inn, New York, N.Y., a corporation of New York No Drawing. Filed Apr. 30, 1962, Ser. N 191,305 9 Claims. (Cl. 75-176) The present invention relates to cast tungsten base alloys containing hafnium and which are characterized by the fact that they are capable of being worked at elevated temperatures and have unusually high strength and hardness at temperatures above 2000 F. This application is a continuation-in-part of applicants copending application, Serial No. 41,766, filed July 11, 1960.
The alloys of the present invention are castings containing from 02% to 5% hafnium, up to .50% carbon. The balance consists essentially of tungsten except that small quantities of zirconium, tantalum, columbium or molybdenum may be present as optional ingredients. Thus, one or more of the elements of zirconium, tantalum and columbium may be present in amounts not exceeding a total of about 1% and molybdenum may be present in an amount not exceeding about Oxygen, even in the smallest amounts, is deleterious and hence must be less than 005% and preferably less than 001%.
Highly useful alloys within the scope of the present invention include alloys containing .01% to .10% carbon. However, when carbon is present in amounts in the order of .01% or more, the hafnium content should not exceed about 1%. Larger quantities of hafnium, within the limits stated above, may be present in carbon free alloys or alloys containing less than .01% carbon.
The alloys of the present invention may be prepared by arc-melting in vacuum, preferably using a furnace of the type disclosed in the United States Patent 2,656,743. A a
preferred method of deoxidizing the melt is by adding carbon to the charge to react with any oxygen present in raw materials and in quantities which will leave the desired excess in the final casting. The absolute pressure during the melting operation is preferably maintained below 50 microns of mercury.
The following are specific examples of alloys coming within the scope of the invention:
The alloys of the present invention may be forged or Worked at temperatures in the neighborhood of 3600 F. to 4000 F.
All proportions given are proportions by weight.
What is claimed is:
1. A cast alloy containing from .O2% to 5% hafnium, up to carbon, less than .005 oxygen, not more than 1% of metal from the group consisting of zirconium, tantalum and colurnbium, not more than 10% molybdenum and the balance consisting essentially of tungsten.
2. A cast alloy containing from 02% to 1% hafnium, up to 50% carbon, less than 005% oxygen, not more than 1% of metal from the group consisting of zirconium, tantalum and columbium, not more than 10% molybdenum and the balance consisting essentially of tungsten.
3. A cast alloy containing from 02% to 1% hafnium, up to .10% carbon, less than .005 oxygen, not more than 1% of metal from the group consisting of zirconium, tantalum and eolurnbium, not more than 10% molybclenum and the balance consisting essentially of tungsten.
4. A cast alloy containing from 02% to 5% hafnium, up to 50% carbon, less than 005% oxygen, not more than 10% molybdenum and the balance consisting essentially of tungsten.
5. A cast alloy containing from 02% to 1% hafnium, up to 50% carbon, less than 005% oxygen, not more than 10% molybdenum and the balance consisting essentially of tungsten.
6. A cast alloy containing from 02% to 1% hafnium, up to .10% carbon, less than 005% oxygen, not more than 10% molybdenum and the balance consisting essentially of tungsten.
7. A cast alloy containing from 02% to 5% hafnium, up to .50% carbon, less than 005% oxygen, and the balance consisting essentially of tungsten.
8. A cast alloy containing from 02% to 1% hafnium, up to .50% carbon, less than 005% oxygen, and the balance consisting essentially of tungsten.
9. A cast alloy containing from 02% to 1% hafnium, up to .10% carbon, less than 005% oxygen, and the balance consisting essentially of tungsten.
References Cited in the file of this patent UNITED STATES PATENTS 2,234,969 Hensel et a1 Mar. 18, 1941 2,580,273 Bens et a1. Dec. 25, 1951 2,678,268 Ham et al May 11, 1954 2,678,269 Ham et a1 May 11, 1954 2,678,270 Ham et al May 11, 1954 2,678,271 Ham et al May 11, 1954 2,678,272 Ham et a1 May 11, 1954 2,798,808 Iredell et al July 9, 1957 2,947,624 Semchyshen Aug. 2, 1960 2,977,225 Wlodek et a1 Mar. 28, 1961 FOREIGN PATENTS 216,840 Great Britain June 29, 1925 1,233,810 France May 9, 1960
Claims (1)
1. A CAST ALLOY CONTAINING FROM .02% TO 5% HAFNIUM, UP TO .50% CARBON, LESS THAN .005% OXYGEN, NOT MORE THAN 1% OF METAL FROM THE GROUP CONSISTING OF ZIRCONIUM, TANTALUM AND COLUMBIUM, NOT MORE THAN 10% MOLYBDENUM AND THE BALANCE CONSISTING ESSENTIALLY OF TUNGSTEN.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US191305A US3116145A (en) | 1962-04-30 | 1962-04-30 | Tungsten-hafnium alloy casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US191305A US3116145A (en) | 1962-04-30 | 1962-04-30 | Tungsten-hafnium alloy casting |
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US3116145A true US3116145A (en) | 1963-12-31 |
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US191305A Expired - Lifetime US3116145A (en) | 1962-04-30 | 1962-04-30 | Tungsten-hafnium alloy casting |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3169860A (en) * | 1962-04-30 | 1965-02-16 | American Metal Climax Inc | Molybdenum-hafnium alloy casting |
US3222166A (en) * | 1963-10-11 | 1965-12-07 | Crucible Steel Co America | Tungsten-base alloy |
US3243291A (en) * | 1963-10-29 | 1966-03-29 | Gen Telephone & Elect | High-temperature alloy |
US3390984A (en) * | 1965-03-29 | 1968-07-02 | Gen Telephone & Elect | High-temperature ductile alloys |
US3395013A (en) * | 1965-03-29 | 1968-07-30 | Gen Telepohone And Electronics | High-temperature ductile alloys |
US3434811A (en) * | 1965-02-26 | 1969-03-25 | Gen Electric | Tungsten-hafnium-oxygen alloys |
US3434829A (en) * | 1966-12-21 | 1969-03-25 | Gen Electric | Tungsten-base alloys |
US3441391A (en) * | 1967-01-26 | 1969-04-29 | Gen Electric | Tungsten-base alloys |
US5760317A (en) * | 1995-10-27 | 1998-06-02 | The United States Of America As Represented By The Secretary Of The Army | Flow softening tungsten based composites |
Citations (12)
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---|---|---|---|---|
GB216840A (en) * | 1923-05-30 | 1925-06-29 | Telefunken Gesellschaft Fuer Drahtlose Telegraphie, M.B.H. | |
US2234969A (en) * | 1939-02-24 | 1941-03-18 | Mallory & Co Inc P R | Tungsten base contact |
US2580273A (en) * | 1947-09-25 | 1951-12-25 | Climax Molybdenum Co | Refractory metal alloy castings and methods of making same |
US2678271A (en) * | 1951-10-06 | 1954-05-11 | Climax Molybdenum Co | Molybdenum-zirconium alloys |
US2678268A (en) * | 1951-10-06 | 1954-05-11 | Climax Molybdenum Co | Molybdenum-vanadium alloys |
US2678269A (en) * | 1951-10-06 | 1954-05-11 | Climax Molybdenum Co | Molybdenum-titanium alloys |
US2678270A (en) * | 1951-10-06 | 1954-05-11 | Climax Molybdenum Co | Molybdenum-tantalum alloys |
US2678272A (en) * | 1951-10-06 | 1954-05-11 | Climax Molybdenum Co | Molybdenum-columbium alloys |
US2798808A (en) * | 1953-02-02 | 1957-07-09 | Westinghouse Electric Corp | Method of introducing zirconia into tungsten powder preliminary to forming electrodes |
US2947624A (en) * | 1958-09-10 | 1960-08-02 | American Metal Climax Inc | High temperature alloy |
FR1233810A (en) * | 1958-09-10 | 1960-10-12 | American Metal Climax Inc | Cast Molybdenum Alloys |
US2977225A (en) * | 1959-02-25 | 1961-03-28 | Union Carbide Corp | High-temperature alloys |
-
1962
- 1962-04-30 US US191305A patent/US3116145A/en not_active Expired - Lifetime
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB216840A (en) * | 1923-05-30 | 1925-06-29 | Telefunken Gesellschaft Fuer Drahtlose Telegraphie, M.B.H. | |
US2234969A (en) * | 1939-02-24 | 1941-03-18 | Mallory & Co Inc P R | Tungsten base contact |
US2580273A (en) * | 1947-09-25 | 1951-12-25 | Climax Molybdenum Co | Refractory metal alloy castings and methods of making same |
US2678271A (en) * | 1951-10-06 | 1954-05-11 | Climax Molybdenum Co | Molybdenum-zirconium alloys |
US2678268A (en) * | 1951-10-06 | 1954-05-11 | Climax Molybdenum Co | Molybdenum-vanadium alloys |
US2678269A (en) * | 1951-10-06 | 1954-05-11 | Climax Molybdenum Co | Molybdenum-titanium alloys |
US2678270A (en) * | 1951-10-06 | 1954-05-11 | Climax Molybdenum Co | Molybdenum-tantalum alloys |
US2678272A (en) * | 1951-10-06 | 1954-05-11 | Climax Molybdenum Co | Molybdenum-columbium alloys |
US2798808A (en) * | 1953-02-02 | 1957-07-09 | Westinghouse Electric Corp | Method of introducing zirconia into tungsten powder preliminary to forming electrodes |
US2947624A (en) * | 1958-09-10 | 1960-08-02 | American Metal Climax Inc | High temperature alloy |
FR1233810A (en) * | 1958-09-10 | 1960-10-12 | American Metal Climax Inc | Cast Molybdenum Alloys |
US2977225A (en) * | 1959-02-25 | 1961-03-28 | Union Carbide Corp | High-temperature alloys |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3169860A (en) * | 1962-04-30 | 1965-02-16 | American Metal Climax Inc | Molybdenum-hafnium alloy casting |
US3222166A (en) * | 1963-10-11 | 1965-12-07 | Crucible Steel Co America | Tungsten-base alloy |
US3243291A (en) * | 1963-10-29 | 1966-03-29 | Gen Telephone & Elect | High-temperature alloy |
US3434811A (en) * | 1965-02-26 | 1969-03-25 | Gen Electric | Tungsten-hafnium-oxygen alloys |
US3390984A (en) * | 1965-03-29 | 1968-07-02 | Gen Telephone & Elect | High-temperature ductile alloys |
US3395013A (en) * | 1965-03-29 | 1968-07-30 | Gen Telepohone And Electronics | High-temperature ductile alloys |
US3434829A (en) * | 1966-12-21 | 1969-03-25 | Gen Electric | Tungsten-base alloys |
US3441391A (en) * | 1967-01-26 | 1969-04-29 | Gen Electric | Tungsten-base alloys |
US5760317A (en) * | 1995-10-27 | 1998-06-02 | The United States Of America As Represented By The Secretary Of The Army | Flow softening tungsten based composites |
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