| 摘要 |
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 DEG C, but has reduced toughness and high-temperature creep characteristics in an operation at about 500 DEG C, this material is allowed to have a satisfactory toughness and excellent high-temperature creep characteristics and can be suitably used at high temperatures. |
| 申请人 |
MITSUBISHI HEAVY INDUSTRIES, LTD.;KABUSHIKI KAISHA KOBE SEIKO SHO |
发明人 |
KAWAI, HISATAKA;KADOYA, YOSHIKUNI;TAKAHASHI, KOJI;MAGOSHI, RYOTARO;YASUMOTO, YASUHIKO;TSUCHIYAMA,TOMOHIRO |
