US2006011271A1PendingUtilityA1

Ni-based single crystal superalloy

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Assignee: KOBAYASHI TOSHIHARUPriority: Dec 6, 2002Filed: Dec 5, 2003Published: Jan 19, 2006
Est. expiryDec 6, 2022(expired)· nominal 20-yr term from priority
Inventors:Toshiharu KobayashiYutaka KoizumiTadaharu YokokawaHiroshi HaradaYasuhiro AokiMikiya AraiShoiu Masaki
C22C 19/057
41
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Claims

Abstract

The object of the present invention is to provide an Ni-based single crystal super alloy capable of improving strength by preventing precipitation of a TCP phase at high temperatures. This object is achieved by an Ni-based single crystal super alloy having a composition comprising 5.0-7.0 wt % of Al, 4.0-10.0 wt % of Ta, 1.1-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co and 4.1-14.0 wt % of Ru in terms of its weight ratio, with the remainder consisting of Ni and unavoidable impurities.

Claims

exact text as granted — not AI-modified
1 . An Ni-based single crystal super alloy having a composition comprising 5.0-7.0 wt % of Al, 4.0-10.0 wt % of Ta, 1.1-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co and 4.1-14.0 wt % of Ru in terms of its weight ratio, with the remainder consisting of Ni and unavoidable impurities.  
     
     
         2 . An Ni-based single crystal super alloy having a composition comprising 5.0-7.0 wt % of Al, 4.0-6.0 wt % of Ta, 1.1-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co, and 4.1-14.0 wt % of Ru in terms of weight ratio, with the remainder consisting of Ni and unavoidable impurities.  
     
     
         3 . An Ni-based single crystal super alloy having a composition comprising 5.0-7.0 wt % of Al, 4.0-6.0 wt % of Ta, 2.9-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co and 4.1-14.0 wt % of Ru in terms of weight ratio, with the remainder consisting of Ni and unavoidable impurities.  
     
     
         4 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.9 wt % of Al, 5.9 wt % of Ta, 3.9 wt % of Mo, 5.9 wt % of W, 4.9 wt % of Re, 0.10 wt % of Hf, 2.9 wt % of Cr, 5.9 wt % of Co and 5.0 wt % of Ru in terms of weight ratio, with the remainder consisting of Ni and unavoidable impurities.  
     
     
         5 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.8 wt % of Al, 5.6 wt % of Ta, 3.1 wt % of Mo, 5.8 wt % of W, 4.9 wt % of Re, 0.10 wt % of Hf, 2.9 wt % of Cr, 5.8 wt % of Co and 5.0 wt % of Ru in terms of weight ratio, with the remainder consisting of Ni and unavoidable impurities.  
     
     
         6 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.8 wt % of Al, 5.8 wt % of Ta, 3.9 wt % of Mo, 5.8 wt % of W, 4.9 wt % of Re, 0.10 wt % of Hf, 2.9 wt % of Cr, 5.8 wt % of Co and 6.0 wt % of Ru in terms of weight ratio, with the remainder consisting of Ni and unavoidable impurities.  
     
     
         7 . An Ni-based single crystal super alloy according to  claim 1  further comprising 0-2.0 wt % of Ti in terms of weight ratio.  
     
     
         8 . An Ni-based single crystal super alloy according to  claim 1  further comprising 0-4.0 wt % of Nb in terms of weight ratio.  
     
     
         9 . An Ni-based single crystal super alloy according to  claim 1  further comprising at least one of elements selected from B, C, Si, Y, La, Ce, V and Zr.  
     
     
         10 . An Ni-based single crystal super alloy according to  claim 9  having a composition comprising 0.05 wt % or less of B, 0.15 wt % or less of C, 0.1 wt % or less of Si, 0.1 wt % or less of Y, 0.1 wt % or less of La, 0.1 wt % or less of Ce, 1 wt % or less of V and 0.1 wt % or less of Zr in terms of weight ratio.  
     
     
         11 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.0-7.0 wt % of Al, 4.0-10.0 wt % of Ta, 1.1-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co, 10.0-14.0 wt % of Ru, 4.0 wt % or less of Nb, 2.0 wt % or less of Ti, 0.05 wt % or less of B, 0.15 wt % or less of C, 0.1 wt % or less of Si, 0.1 wt % or less of Y, 0.1 wt % or less of La, 0.1 wt % or less of Ce, 1 wt % or less of V and 0.1 wt % or less of Zr.  
     
     
         12 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.8-7.0 wt % of Al, 4.0-5.6 wt % of Ta, 3.3-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.9-4.3 wt % of Cr, 0-9.9 wt % of Co, 4.1-14.0 wt % of Ru, 4.0 wt % or less of Nb, 2.0 wt % or less of Ti, 0.05 wt % or less of B, 0.15 wt % or less of C, 0.1 wt % or less of Si, 0.1 wt % or less of Y, 0.1 wt % or less of La, 0.1 wt % or less of Ce, 1 wt % or less of V and 0.1 wt % or less of Zr.  
     
     
         13 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.0-7.0 wt % of Al, 4.0-10.0 wt % of Ta, 1.1-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.9-5.0 wt % of Cr, 0-9.9 wt % of Co, 6.5-14.0 wt % of Ru, 4.0 wt % or less of Nb, 2.0 wt % or less of Ti, 0.05 wt % or less of B, 0.15 wt % or less of C, 0.1 wt % or less of Si, 0.1 wt % or less of Y, 0.1 wt % or less of La, 0.1 wt % or less of Ce, 1 wt % or less of V and 0.1 wt % or less of Zr.  
     
     
         14 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.0-7.0 wt % of Al, 4.0-6.0 wt % of Ta, 3.3-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co, 4.1-14.0 wt % of Ru, 4.0 wt % or less of Nb, 2.0 wt % or less of Ti, 0.05 wt % or less of B, 0.15 wt % or less of C, 0.1 wt % or less of Si, 0.1 wt % or less of Y, 0.1 wt % or less of La, 0.1 wt % or less of Ce, 1 wt % or less of V and 0.1 wt % or less of Zr.  
     
     
         15 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.0-7.0 wt % of Al, 4.0-5.6 wt % of Ta, 3.3-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co, 4.1-14.0 wt % of Ru, 4.0 wt % or less of Nb, 2.0 wt % or less of Ti, 0.05 wt % or less of B, 0.15 wt % or less of C, 0.1 wt % or less of Si, 0.1 wt % or less of Y, 0.1 wt % or less of La, 0.1 wt % or less of Ce, 1 wt % or less of V and 0.1 wt % or less of Zr.  
     
     
         16 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.0-7.0 wt % of Al, 4.0-10.0 wt % of Ta, 3.1-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co, 4.1-14.0 wt % of Ru, 4.0 wt % or less of Nb, 2.0 wt % or less of Ti, 0.05 wt % or less of B, 0.15 wt % or less of C, 0.1 wt % or less of Si, 0.1 wt % or less of Y, 0.1 wt % or less of La, 0.1 wt % or less of Ce, 1 wt % or less of V and 0.1 wt % or less of Zr.  
     
     
         17 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.8-7.0 wt % of Al, 4.0-10.0 wt % of Ta, 3.1-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co, 4.1-14.0 wt % of Ru, 4.0 wt % or less of Nb, 2.0 wt % or less of Ti, 0.05 wt % or less of B, 0.15 wt % or less of C, 0.1 wt % or less of Si, 0.1 wt % or less of Y, 0.1 wt % or less of La, 0.1 wt % or less of Ce, 1 wt % or less of V and 0.1 wt % or less of Zr.  
     
     
         18 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.0-7.0 wt % of Al, 4.0-10.0 wt % of Ta, 3.1-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.9-4.3 wt % of Cr, 0-9.9 wt % of Co, 4.1-14.0 wt % of Ru, 4.0 wt % or less of Nb, 2.0 wt % or less of Ti, 0.05 wt % or less of B, 0.15 wt % or less of C, 0.1 wt % or less of Si, 0.1 wt % or less of Y, 0.1 wt % or less of La, 0.1 wt % or less of Ce, 1 wt % or less of V and 0.1 wt % or less of Zr.  
     
     
         19 . An Ni-based single crystal super alloy according to  claim 1  having a composition comprising 5.0-7.0 wt % of Al, 4.0-10.0 wt % of Ta+Nb+Ti, 3.3-4.5 wt % of Mo, 4.0-10.0 wt % of W, 3.1-8.0 wt % of Re, 0-0.50 wt % of Hf, 2.0-5.0 wt % of Cr, 0-9.9 wt % of Co, 4.1-14.0 wt % of Ru, 0.05 wt % or less of B, 0.15 wt % or less of C, 0.1 wt % or less of Si, 0.1 wt % or less of Y, 0.1 wt % or less of La, 0.1 wt % or less of Ce, 1 wt % or less of V and 0.1 wt % or less of Zr.  
     
     
         20 . An Ni-based single crystal super alloy according to  claim 1  wherein, when lattice constant of matrix is taken to be a1 and lattice constant of precipitation phase is taken to be a2, a2≦0.999a1.  
     
     
         21 . An Ni-based single crystal super alloy according to  claim 20  wherein the lattice constant of the precipitation phase a2 is 0.9965 or less of the lattice constant of the matrix a1.  
     
     
         22 . An Ni-based single crystal super alloy, wherein lattice constant of its precipitation phase a2 is 0.9965 or less of lattice constant of its matrix a1, and having a composition including Re and Ru, and 2.9-4.5 wt % of Mo.  
     
     
         23 . An Ni-based single crystal super alloy, wherein lattice constant of its precipitation phase a2 is 0.9965 or less of lattice constant of its matrix a1, and having a composition including 2.9-4.5 wt % of Mo, 3.1-8.0 wt % of Re and 4.1-14.0 wt % of Ru.  
     
     
         24 . An Ni-based single crystal super alloy according to  claim 1  wherein a dislocation space of the alloy is 40 nm or less.

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