C - Chemistry – Metallurgy – 22 – C
Patent
C - Chemistry, Metallurgy
22
C
C22C 19/05 (2006.01)
Patent
CA 2179214
This invention relates to a forgeable carbide-strengthened austenitic nickel alloy, consisting of (in % by weight) carbon 0.20 to 0.40 % the quantity of precipitatable carbon C?=Ctot. (cdiss.+Cfix.Ti+Cfix.Nb+Cfix.Zr) being at least 0.083% to 0.300%, chromium 25 to 30,0 %, iron 8 to 11,0 %, aluminium more than 2.4 to 3,0 %, yttrium 0.01 to 0.15 %, titanium 0.01 to 0.20 %, niobium 0.01 to 0.20 %, zirconium 0.01 to 0.10 %, magnesium 0.001 to 0.015 %, calcium 0.001 to 0.010 %, nitrogen maximum 0.030 %, silicon maximum 0.50 %, manganese maximum 0.25 %, phosphorus maximum 0.020 %, sulphur maximum 0.010 %, residue nickel, including unavoidable melting-conditioned impurities. The alloy is suitable for articles having high resistivity to isothermal and cyclic high temperature oxidation, high strength at high temperature and creep rupture strength at temperature up to 1200°C.
Kirby Eades Gale Baker
Krupp Vdm Gmbh
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