US3362816A - Cobalt alloy - Google Patents
Cobalt alloy Download PDFInfo
- Publication number
- US3362816A US3362816A US376582A US37658264A US3362816A US 3362816 A US3362816 A US 3362816A US 376582 A US376582 A US 376582A US 37658264 A US37658264 A US 37658264A US 3362816 A US3362816 A US 3362816A
- Authority
- US
- United States
- Prior art keywords
- percent
- nickel
- alloy
- cobalt
- cobalt alloy
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C19/00—Alloys based on nickel or cobalt
- C22C19/07—Alloys based on nickel or cobalt based on cobalt
Definitions
- the novel alloys have better high temperature characteristics than the hardenable nickel base superalloys.
- the phases producing the hardening in the nickel-solid solution such as Ni Al or Ni Ti, dissolve at temperatures slightly above 1000 C. so that the upper temperature limit for using the known nickel base superalloys may only just exceed 900 C.
- novel alloys are very well suited for hard facing machine parts subjected to high temperatures. Due to the high strength characteristics at high temperatures and its ductility, the molybdenum containing alloy can be directly used for the manufacture of turbine blades and vanes.
- a cobalt base alloy consisting essentially of, 5 to 10 percent of nickel, by weight, from about 15 to about 30 percent of chromium, 10 to 20 percent of tungsten, 5 to 10 percent of nickel, and about 0.5 to 3 percent of zirconium boride ZrB the balance being cobalt.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Chemically Coating (AREA)
- Inert Electrodes (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Description
United States Patent 3,362,816 COBALT ALLOY Heinrich Winter, Eschborn, Taunus, and Horst Kiupel,
Langen, Germany, assiguors to the Federal Republic of Germany as represented by the Secretary of Defense, Bonn, Germany N0 Drawing. Filed June 19, 1964, Ser. No. 376,582 Claims priority, application Germany, June 22, 1963,
2 Claims. (Cl. 75-171) Percent by weight Cobalt 55 Chromium 20 Tungsten 15 Nickel Our investigations concerning the incorporation of a hard temperature stable finely dispersed phase into an alloy of said type as matrix had the surprising result that a considerable improvement of the high temperature strength is attained when zirconium and boron, in an atomic proportion of about 1:2, corresponding to the compound ZrB are added to the melt in a total amount of up to about 12, preferably 1.5 to 3 percent by Weight of the alloy.
Already 0.5% by weight of such a Zr+2B addition to the base alloy produces a considerable increase of the high temperature properties. At 800 C. the hardness HV 5 increased from 98 to 134 kg./Inm. (The HV values designate the Vickers hardness, the numbers 5 etc, referring to the load in kg. applied for the test, in accordance with the ofiicial German testing standards, published as DIN 50133.)
Percent by Weight Cobalt 55 Chromium 20 Tungsten Nickel 5 Molybdenum 5 In such alloys, the malleability even increases up to an addition of 2% ZrB while also the strength characteristics at high temperatures show a strong increase. Above said limit, the malleability decreases again but even with an addition of 12% ZrB the alloy is not yet completely embrittled.
An alloy of the character described, containing 5% Mo and 1.5% ZrB tested in the cast state, had at room temperature an HV 30 of 357 kg/mm. and at 800 C. an HV 5 of 262 kg./mm.
It is surprising that forming the alloy and subsequent annealing for several hours at temperatures up to and exceeding 900 C. does not produce a decrease of the strength properties at room temperature but a further increase. The following values were measured at an alloy containing 5% Mo and 1.5% ZrB reduced by 50%.
HV 30 at room temperature 550 HV 5 at 800 C. 374 HV 30 after 3 hours annealing at 900 C. at room temperature 625 At the same time, the strength properties up to temperatures exceeding 1000 C. Were considerably increased. Particularly at temperatures about 900 C., the novel alloys have better high temperature characteristics than the hardenable nickel base superalloys. In said alloys, the phases producing the hardening in the nickel-solid solution, such as Ni Al or Ni Ti, dissolve at temperatures slightly above 1000 C. so that the upper temperature limit for using the known nickel base superalloys may only just exceed 900 C.
The novel alloys are very well suited for hard facing machine parts subjected to high temperatures. Due to the high strength characteristics at high temperatures and its ductility, the molybdenum containing alloy can be directly used for the manufacture of turbine blades and vanes.
We claim:
1. A cobalt base alloy consisting essentially of, 5 to 10 percent of nickel, by weight, from about 15 to about 30 percent of chromium, 10 to 20 percent of tungsten, 5 to 10 percent of nickel, and about 0.5 to 3 percent of zirconium boride ZrB the balance being cobalt.
2. The alloys as claimed in claim 1 wherein nickel is replaced partially by molybdenum.
References Cited UNITED STATES PATENTS 2,126,742 8/1938 Golyer 2,126,743 8/1938 Golyer 75 171 2,126,745 8/1938 Golyer 75-171 2,126,749 8/1938 Golyer 75-170 2,309,371 1/1943 Wissler 75-171 2,704,250 3/1955 Payson 75-171 DAVID L. RECK, Primary Examiner. HYLAND BIZOT, RICHARD O. DEAN, Examiners.
Claims (1)
1. A COBALT BASE ALLOY CONSISTING ESSENTIALLY OF, 5 TO 10 PERCENT OF NICKEL, BY WEIGHT, FROM ABOUT 15 TO ABOUT 30 PERCENT OF CHROMIUM, 10 TO 20 PERCENT OF TUNGSTEN, 5 TO 10 PERCENT OF NICKEL, AND ABOUT 0.5 TO 3 PERCENT OF ZIRCONIUM BORIDE ZRB2, THE BALANCE BEING COBALT.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEW34747A DE1259101B (en) | 1963-06-22 | 1963-06-22 | High temperature resistant, dispersion hardened cobalt alloy |
Publications (1)
Publication Number | Publication Date |
---|---|
US3362816A true US3362816A (en) | 1968-01-09 |
Family
ID=7600681
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US376582A Expired - Lifetime US3362816A (en) | 1963-06-22 | 1964-06-19 | Cobalt alloy |
Country Status (4)
Country | Link |
---|---|
US (1) | US3362816A (en) |
DE (1) | DE1259101B (en) |
GB (1) | GB1034551A (en) |
NL (1) | NL6402540A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3416916A (en) * | 1966-07-07 | 1968-12-17 | Union Carbide Corp | Ductile cobalt-base alloy |
US3436512A (en) * | 1966-04-13 | 1969-04-01 | Coast Metals Inc | Method of spray coating gas seals of gas turbines and the like |
US3937628A (en) * | 1973-05-30 | 1976-02-10 | Hitachi Metals, Ltd. | Solid-solution strengthened austenitic alloys |
US4123266A (en) * | 1973-03-26 | 1978-10-31 | Cabot Corporation | Sintered high performance metal powder alloy |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2126742A (en) * | 1936-04-17 | 1938-08-16 | Golyer Anthony G De | Alloy |
US2126749A (en) * | 1937-05-19 | 1938-08-16 | Golyer Anthony G De | Alloy |
US2126745A (en) * | 1936-08-25 | 1938-08-16 | Golyer Anthony G De | Alloy |
US2126743A (en) * | 1936-06-13 | 1938-08-16 | Golyer Anthony G De | Boron alloy |
US2309371A (en) * | 1940-06-11 | 1943-01-26 | Haynes Stellite Co | Cutting tool |
US2704250A (en) * | 1948-12-03 | 1955-03-15 | Crucible Steel Company | High temperature high strength alloys |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2996379A (en) * | 1958-12-04 | 1961-08-15 | Union Carbide Corp | Cobalt-base alloy |
-
1963
- 1963-06-22 DE DEW34747A patent/DE1259101B/en active Pending
-
1964
- 1964-03-12 NL NL6402540A patent/NL6402540A/xx unknown
- 1964-06-01 GB GB22528/64A patent/GB1034551A/en not_active Expired
- 1964-06-19 US US376582A patent/US3362816A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2126742A (en) * | 1936-04-17 | 1938-08-16 | Golyer Anthony G De | Alloy |
US2126743A (en) * | 1936-06-13 | 1938-08-16 | Golyer Anthony G De | Boron alloy |
US2126745A (en) * | 1936-08-25 | 1938-08-16 | Golyer Anthony G De | Alloy |
US2126749A (en) * | 1937-05-19 | 1938-08-16 | Golyer Anthony G De | Alloy |
US2309371A (en) * | 1940-06-11 | 1943-01-26 | Haynes Stellite Co | Cutting tool |
US2704250A (en) * | 1948-12-03 | 1955-03-15 | Crucible Steel Company | High temperature high strength alloys |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3436512A (en) * | 1966-04-13 | 1969-04-01 | Coast Metals Inc | Method of spray coating gas seals of gas turbines and the like |
US3416916A (en) * | 1966-07-07 | 1968-12-17 | Union Carbide Corp | Ductile cobalt-base alloy |
US4123266A (en) * | 1973-03-26 | 1978-10-31 | Cabot Corporation | Sintered high performance metal powder alloy |
US3937628A (en) * | 1973-05-30 | 1976-02-10 | Hitachi Metals, Ltd. | Solid-solution strengthened austenitic alloys |
Also Published As
Publication number | Publication date |
---|---|
NL6402540A (en) | 1964-12-23 |
DE1259101B (en) | 1968-01-18 |
GB1034551A (en) | 1966-06-29 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US3061426A (en) | Creep resistant alloy | |
US2712498A (en) | Nickel chromium alloys having high creep strength at high temperatures | |
US3567526A (en) | Limitation of carbon in single crystal or columnar-grained nickel base superalloys | |
US3343950A (en) | Nickel-chromium alloys useful in the production of wrought articles for high temperature application | |
US2973261A (en) | Columbium base alloys | |
US3155501A (en) | Nickel base alloy | |
US5108700A (en) | Castable nickel aluminide alloys for structural applications | |
US2515185A (en) | Age hardenable nickel alloy | |
US3432294A (en) | Cobalt-base alloy | |
CA2955322C (en) | Ni-based superalloy for hot forging | |
US3667938A (en) | Nickel base alloy | |
US3362816A (en) | Cobalt alloy | |
US3720509A (en) | Nickel base alloy | |
US4722828A (en) | High-temperature fabricable nickel-iron aluminides | |
US2975051A (en) | Nickel base alloy | |
US3069258A (en) | Nickel-chromium casting alloy with niobides | |
US2981620A (en) | Cobalt-nickel base alloy | |
US2656270A (en) | Aluminum alloy containing mischmetal | |
DE1242373B (en) | Warm and long-lasting nickel alloy | |
US3005705A (en) | High temperature alloys | |
US4149882A (en) | Magnesium alloys | |
US3395012A (en) | Niobium alloys | |
US3368888A (en) | Nickel base alloy | |
US2581420A (en) | Alloys | |
US3617261A (en) | Wrought nickel base superalloys |