Material for gas turbine disk

Details Material for gas turbine disk Material for gas turbine disk

C - Chemistry, Metallurgy

22

C

C22C 38/48 (2006.01) C22C 38/00 (2006.01) C22C 38/44 (2006.01) C22C 38/46 (2006.01) C22C 38/52 (2006.01) C22C 38/54 (2006.01) F01D 5/28 (2006.01) F01D 25/00 (2006.01) F02C 7/00 (2006.01)

Patent

CA 2260498

A material for a gas turbine disk comprises 0.05 to 0.15 wt% of carbon, 0. 10 wt% or less of silicon, 0.40 wt% or less of manganese, 9.0 to 12.0 wt% of chromium, 1.0 to 3.5 wt% of nickel, 0.50 to 0.90 wt% of molybdenum, 1.0 to 2.0 wt% of tungsten, 0.10 to 0.30 wt% of vanadium, 0.01 to 0.10 wt% of niobium, 0.01 to 0.05 wt% of nitrogen, and a remainder comprising iron and unavoidable impurities, wherein the contents of nickel, molybdenum and tungsten satisfy a relationship -1.5 wt% ~ Mo+W/2-Ni ~0.7 wt%. Accordingly, unlike conventional gas turbine disk materials such as a heat resisting steel of 12Cr-type which can be used in an operation at about 400°C, but has reduced toughness and high-temperature creep characteristics in an operation at about 500°C, this material is allowed to nave a satisfactory toughness and excellent high-temperature creep characteristics and can be suitably used at high temperatures. 22

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