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US 12,442,307 B2Granted
Steam turbine member
AssigneeFuji Electric Co., Ltd.
InventorsYuya Nakashima, Masato Hirota, Naoya Yoshimi
Life of this patent
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Abstract
A steam turbine member has suppressed adhesion of scale for a long time without deterioration of corrosion resistance and the like of a turbine. A steam turbine member includes a hard layer 2 and a deposited amorphous carbon film 3 on a base material 1, in that order.
Claims7
A steam turbine member comprising:
- a base material comprising metal;
- a first inorganic layer formed on the base material, the first inorganic layer comprising one or more inorganic compounds selected from WC, TiC, SiO2, Al2O3, TiN, ZrN, CrN, TiCN, TiAlN, TiCrN, ZrO2 and CoNiCrAlY;
- a second inorganic layer formed on the first inorganic layer on a side opposite to the base material, the second inorganic layer comprising one or more inorganic compounds selected from WC, TiC, SiO2, Al2O3, TiN, ZrN, CrN, TICN, TiAlN, TiCrN, ZrO2 and CoNiCrAlY;
- and
- a deposited amorphous carbon film formed on the second inorganic layer on a side opposite to the first inorganic layer,
- wherein the second inorganic layer has a hardness greater than a hardness of the first inorganic layer, and the deposited carbon film has a maximum height roughness Rz of more than 1.0 μm and equal to or less than 6.3 μm.
3 more elements
Dependencies are inferred from the claim text.