US3368888A - Nickel base alloy - Google Patents

Nickel base alloy Download PDF

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Publication number
US3368888A
US3368888A US381548A US38154864A US3368888A US 3368888 A US3368888 A US 3368888A US 381548 A US381548 A US 381548A US 38154864 A US38154864 A US 38154864A US 3368888 A US3368888 A US 3368888A
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nickel base
base alloy
nickel
weight
percent
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US381548A
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Winter Heinrich
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FED REPUBLIC OF GERMANY
FEDERAL REPUBLIC OF GERMANY
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FED REPUBLIC OF GERMANY
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    • 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
    • C22C19/03—Alloys based on nickel or cobalt based on nickel
    • C22C19/05—Alloys based on nickel or cobalt based on nickel with chromium
    • C22C19/051—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W
    • C22C19/056—Alloys based on nickel or cobalt based on nickel with chromium and Mo or W with the maximum Cr content being at least 10% but less than 20%
    • 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

Definitions

  • alloys of the following composition have a much improved ductility at low as well as at high temperatures while at the same time the tensile strength values are considerably increased over the whole temperature range: 8-12% by weight of chromium, 510% cobalt, 47% aluminum, 36% molybdenum, 13% niobium, 13% vanadium, 13% tungsten, 0.5-2% titanium, 0.2 to 1% zirconium, 0.05 to 0.3% carbon.
  • the proportion of tungsten remains so low as not to increase noticeably the density of the alloy while it exerts its strengthening etfect.
  • the titanium and carbon ratio must be adjusted to about 67:1 so as to correspond essentially to the composition TiC.
  • a nickel base alloy having improved high temperature strength consisting essentially in percent by weight of about 8-12 chromium, 5-10 cobalt, 4-7 aluminum, 3-6 molybdenum, 1-3 niobium, 1-3 vanadium, l-3 tungsten, 0.5-2 titanium, 0.2-l zirconium, 0.05-0.3 carbon, the balance being essentially nickel, the Ti/C ratio being about 6-7: 1.
  • a nickel base alloy as claimed in claim 1 consisting essentially in percent by weight of 10 chromium, 7 cobalt, 5 aluminum, 4 molybdenum, 2 niobium, 2 vanadium, 2 tungsten, 1 titanium, 0.5 zirconium, 0.15 carbon, the balance being essentially nickel.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Turbine Rotor Nozzle Sealing (AREA)

Description

United States Patent 3,368,888 NICKEL BASE ALLOY Heinrich Winter, Eschborn, Taunus, Germany, assignor to The Federal Republic of Germany as represented by the Secretary of Defense No Drawing. Filed July 9, 1964, Ser. No. 381,548
Claims priority, application Germany, July 19, 1963,
2 Claims. (Cl. 75171) This invention relates to nickel base alloys having improved properties.
The nickel mixed crystal of the composition 7% Cr, 3% Al, 3% Mo, 3% W, 2% Nb, the balance being nickel, forms with titanium carbide a quasi-binary system having an eutectic at about 5 percent by weight of TiC and an eutectic temperature of about 1345 C. At said temperature, about 3 percent by weight of TiC are taken up in solution; with decreasing temperature, the solubility decreases rapidly and is at 900 C. practically zero.
The strength of said alloys at room and elevated temperatures increases considerably with increasing TiC content but from about 1 percent by weight of TiC on, the ductility decreases strongly. Alloys with about 0.5 percent by weight of TiC exhibit already very good room and elevated temperature strength and still excellent ductility. By increasing the Al content to 5 and the Cr content to percent by weight, the room temperature and elevated temperature properties are considerably improved; however, the elongation values at elevated temperatures of 800-900 C. are no longer satisfactory.
I have found that alloys of the following composition have a much improved ductility at low as well as at high temperatures while at the same time the tensile strength values are considerably increased over the whole temperature range: 8-12% by weight of chromium, 510% cobalt, 47% aluminum, 36% molybdenum, 13% niobium, 13% vanadium, 13% tungsten, 0.5-2% titanium, 0.2 to 1% zirconium, 0.05 to 0.3% carbon.
In this alloy, the proportion of tungsten remains so low as not to increase noticeably the density of the alloy while it exerts its strengthening etfect. The titanium and carbon ratio must be adjusted to about 67:1 so as to correspond essentially to the composition TiC.
"ice
With an alloy of the composition 66.3% Ni, 10% Cr, 7% Co, 5% Al, 4% Mo, 2% Nb, 2%V, 2% W, 1% Ti, 0.5% Zr, and 0.2% C the following values were measured in the as-cast state:
1 At about 25% elongation.
(The HV values designate the Vickers hardness, the numbers 30 etc. referring to the load in kg. applied for the test, in accordance with the official German testing standards, published as DIN 50133.)
The room temperature and high temperature strength properties of said cast alloy are, therefore, far above the average of the presently known nickel base superalloys. Hence, alloys of this type are particularly suitable for making blades and other parts of gas turbines.
I claim:
1. A nickel base alloy having improved high temperature strength consisting essentially in percent by weight of about 8-12 chromium, 5-10 cobalt, 4-7 aluminum, 3-6 molybdenum, 1-3 niobium, 1-3 vanadium, l-3 tungsten, 0.5-2 titanium, 0.2-l zirconium, 0.05-0.3 carbon, the balance being essentially nickel, the Ti/C ratio being about 6-7: 1.
2. A nickel base alloy as claimed in claim 1 consisting essentially in percent by weight of 10 chromium, 7 cobalt, 5 aluminum, 4 molybdenum, 2 niobium, 2 vanadium, 2 tungsten, 1 titanium, 0.5 zirconium, 0.15 carbon, the balance being essentially nickel.
References Cited UNITED STATES PATENTS 2,920,956 1/1960 Nisbet et al 17l 3,061,426 10/1962 Bieber 75171 3,155,501 11/1964 Kaufman et al. 75171 3,183,084 5/1965 Heydt et al. 75-171 DAVID L. RECK, Primary Examiner.
RICHARD O. DEAN, Examiner.

Claims (1)

1. A NICKEL BASE ALLOY HAVING IMPROVED HIGH TEMEPRATURE STRENGTH CONSISTING ESSENTIALLY IN PERCENT BY WEIGHT OF ABOUT 8-12 CHROMIUM, 5-10 COBALT, 4-7 ALUMINUM, 3-6 MOLYBDENUM, 1-3 NIOBIUM, 1-3 VANADIUM, 1-3 TUNGSTEN, 0.5-2 TITANIUM, 0.2-1 ZIRCONIUM, 0.05-0.3 CARBON, THE BALANCE BEING ESSENTIALLY NICKEL, THE TI/C RATIO BEING ABOUT 6-7:1.
US381548A 1963-07-19 1964-07-09 Nickel base alloy Expired - Lifetime US3368888A (en)

Applications Claiming Priority (1)

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DEW0034925 1963-07-19

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US3368888A true US3368888A (en) 1968-02-13

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GB (1) GB1053066A (en)
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411898A (en) * 1966-03-25 1968-11-19 Union Carbide Corp Nickel base alloy
US5294239A (en) * 1990-05-07 1994-03-15 Pm Hochtemperatur-Metall Gmbh Nickel-base superalloy

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2555205B1 (en) * 1983-11-22 1989-05-19 Metalimphy NICKEL-BASED ALLOYS FOR POWDER METALLURGY FOR GAS TURBINE DISCS

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920956A (en) * 1956-10-08 1960-01-12 Universal Cyclops Steel Corp Method of preparing high temperature alloys
US3061426A (en) * 1960-02-01 1962-10-30 Int Nickel Co Creep resistant alloy
US3155501A (en) * 1961-06-30 1964-11-03 Gen Electric Nickel base alloy
US3183084A (en) * 1963-03-18 1965-05-11 Carpenter Steel Co High temperature austenitic alloy

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2920956A (en) * 1956-10-08 1960-01-12 Universal Cyclops Steel Corp Method of preparing high temperature alloys
US3061426A (en) * 1960-02-01 1962-10-30 Int Nickel Co Creep resistant alloy
US3155501A (en) * 1961-06-30 1964-11-03 Gen Electric Nickel base alloy
US3183084A (en) * 1963-03-18 1965-05-11 Carpenter Steel Co High temperature austenitic alloy

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3411898A (en) * 1966-03-25 1968-11-19 Union Carbide Corp Nickel base alloy
US5294239A (en) * 1990-05-07 1994-03-15 Pm Hochtemperatur-Metall Gmbh Nickel-base superalloy

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Publication number Publication date
NL6402543A (en) 1965-01-20
GB1053066A (en) 1900-01-01

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