US2022259702A1PendingUtilityA1

A nickel-based alloy

51
Assignee: ALLOYED LTDPriority: Jul 30, 2019Filed: Jul 30, 2020Published: Aug 18, 2022
Est. expiryJul 30, 2039(~13 yrs left)· nominal 20-yr term from priority
Inventors:David Crudden
C22C 19/05C22C 19/055C22C 19/056
51
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Claims

Abstract

A nickel-based alloy composition consisting, in weight percent, of: from 17.0% to 21.3% chromium, 7.1% or less cobalt, from 0.9% to 6.3% molybdenum, 4.9% or less tungsten, from 1.8% to 3.2% aluminium, from 1.8% to 4.0% titanium, 3.05% or less tantalum, 3.0% or less niobium, 0.1% or less carbon, from 0.001% to 0.1% boron, from 0.001% to 0.5%. zirconium, 0.02% or less magnesium, 0.5% or less silicon, 0.1% or less yttrium, 0.1% or less lanthanum, 0.1% or less cerium, 0.003% or less sulphur, 0.25% or less manganese, 0.5% or less copper, 0.5% or less hafnium, 0.5% vanadium or less, 10.0% or less iron, the balance being nickel and incidental impurities.

Claims

exact text as granted — not AI-modified
1 . A nickel-based alloy composition consisting, in weight percent, of: from 17.0% to 21.3% chromium, 7.1% or less cobalt, from 0.9% to 6.3% molybdenum, 4.9% or less tungsten, from 1.8% to 3.2% aluminium, from 1.8% to 4.0% titanium, 3.05% or less tantalum, 3.0% or less niobium, 0.1% or less carbon, from 0.001% to 0.1% boron, from 0.001% to 0.5%. zirconium, 0.02% or less magnesium, 0.5% or less silicon, 0.1% or less yttrium, 0.1% or less lanthanum, 0.1% or less cerium, 0.003% or less sulphur, 0.25% or less manganese, 0.5% or less copper, 0.5% or less hafnium, 0.5% vanadium or less, 10.0% or less iron, the balance being nickel and incidental impurities. 
     
     
         2 . The nickel-based alloy composition according to  claim 1 , wherein the following equation is satisfied in which W Al , W Ti  W Nb  and W Ta  are the weight percent of aluminium, titanium, niobium and tantalum in the alloy respectively
   (0.6 W   Ti +0.31 W   Nb +0.15 W   Ta )/ W   Al ≤1.1
     preferably, (0.6 W   Ti +0.31 W   Nb +0.15 W   Ta )/ W   Al ≤1.0.
   
     
     
         3 . The nickel-based alloy composition according to  claim 1 , wherein the following equation is satisfied in which W Al , W Ti  W Nb  and W Ta  are the weight percent of aluminium, titanium, niobium and tantalum in the alloy respectively
   (0.6 W   Ti +0.31 W   Nb +0.15 W   Ta )/ W   Al ≥0.64
     preferably, (0.6 W   Ti +0.31 W   Nb +0.15 W   Ta )/ W   Al ≥0.72
     more preferably (0.6 W   Ti +0.31 W   Nb +0.15 W   Ta )/ W   Al ≥0.76
     even more preferably (0.6 W   Ti +0.31 W   Nb +0.15 W   Ta )/ W   Al ≥0.93.
   
     
     
         4 . (canceled) 
     
     
         5 . The nickel-based alloy composition according to  claim 1 , wherein the following equation is satisfied in which W Al , W Ti , W Ta  and W Nb  are the weight percent of aluminium, titanium, tantalum and niobium in the alloy respectively
   3.4≤0.6 W   Ti +0.31 W   Nb +0.15 W   Ta +0.79 W   Al  
     preferably     3.6≤0.6 W   Ti +0.31 W   Nb +0.15 W   Ta +0.79 W   Al .
   
     
     
         6 . The nickel-based alloy composition according to  claim 1 , wherein the following equation is satisfied in which W Al , W Ti , W Ta  and W Nb  are the weight percent of aluminium, titanium, tantalum and niobium in the alloy respectively
   4.6≥0.6 W   Ti +0.31 W   Nb +0.15 W   Ta +0.79 W   Al  
     preferably     4.3≥0.6 W   Ti +0.31 W   Nb +0.15 W   Ta +0.79 W   Al  
     more preferably     4.0≥0.6 W   Ti +0.31 W   Nb +0.15 W   Ta +0.79 W   Al .
   
     
     
         7 . The nickel-based alloy composition of  claim 1 , consisting of, in weight percent, of 18.0% or more chromium. 
     
     
         8 . The nickel-based alloy composition of  claim 1 , consisting of, in weight percent, of 19.5% or less chromium. 
     
     
         9 . The nickel-based alloy composition of  claim 1  consisting of, in weight percent, of 2.25 wt % or less tantalum, preferably of 1.5 wt % or less tantalum, most preferably of 0.65 wt % or less tantalum. 
     
     
         10 . The nickel-based alloy composition of  claim 1  consisting of, in weight percent, of 2.0% or more molybdenum, preferably 3.0% or more molybdenum. 
     
     
         11 . The nickel-based alloy composition of  claim 1  consisting of, in weight percent, of 1.9% or more titanium, preferably 2.0% or more titanium, more preferably 2.3% or more titanium, yet more preferably 2.4% or more titanium, most preferably 2.5% or more titanium. 
     
     
         12 . (canceled) 
     
     
         13 . The nickel-based alloy composition of  claim 1  consisting of, in weight percent, of 2.7 wt. % or less tungsten, preferably 0.7 wt % or less tungsten. 
     
     
         14 . The nickel-based alloy composition of  claim 1 , consisting of, in weight percent, of 2.0% or less niobium. 
     
     
         15 . The nickel-based alloy composition of  claim 1 , consisting of, in weight percent, of 3.5% or less titanium, preferably 3.0% or less titanium. 
     
     
         16 . The nickel-based alloy composition of  claim 1 , consisting of, in weight percent, of 1.9% or more aluminium. 
     
     
         17 . The nickel-based alloy composition of  claim 1 , consisting, in weight percent, of 2.75% or less aluminium, preferably of 2.6% or less aluminium, more preferably of 2.3% or less aluminium. 
     
     
         18 . The nickel-based alloy composition of  claim 1 , consisting of, in weight percent, of 5.3% or less cobalt, preferably 3.5% or less cobalt, more preferably 1.6% or less cobalt. 
     
     
         19 . (canceled) 
     
     
         20 . The nickel-based alloy composition according to  claim 1 , wherein the following equation is satisfied in which W Ta  and W Co  are the weight percent of tantalum and cobalt in the alloy respectively: W Ta +0.43W Co ≤3.05, preferably W Ta +0.43 W Co ≤2.25, more preferably W Ta +0.43W Co ≤1.5, most preferably W Ta +0.43W Co ≤0.65. 
     
     
         21 . The nickel-based alloy composition according to  claim 1 , wherein the following equation is satisfied in which W Ti , W Nb , W Ta  and W Al  are the weight percent of titanium, niobium, tantalum and aluminium in the alloy respectively
   0.6 W   Ti +0.44( W   Nb +0.66 W   Ta )+0.2 W   Al ≥2.8.
   
     
     
         22 . The nickel-based alloy composition of  claim 1 , consisting of, in weight percent, of 0.3% or more niobium, preferably 0.4% or more niobium, more preferably 0.7% or more niobium, even more preferably 0.8% or more niobium, most preferably 1.2% or more niobium. 
     
     
         23 - 25 . (canceled) 
     
     
         26 . The nickel-based alloy composition according to  claim 1 , wherein the alloy comprises, in weight percent, 6.0% or less iron, preferably 5.0 wt % or less iron. 
     
     
         27 . (canceled)

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