High-pressure-resistant turbine blade and production process thereof
A technology for steam turbine blades and production processes, which is applied in manufacturing tools, heat treatment equipment, furnaces, etc., to achieve uniform and stable blade structure, improve toughness, and improve overall impact performance.
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Embodiment 1
[0048] This embodiment provides a high-pressure steam turbine blade, the mass percent of its chemical composition is: C: 0.019%, Si: 0.09%, Mn: 0.83%, Ni: 0.55%, Cr: 1.7%, Mo: 0.11%, Co : 3.9%, V: 4.26%, Nb: 0.01%, Cu: 0.03%, Al: 6.21%, N: 0.007%, Ti: 0.23%, rare earth metal: 0.08%, the balance is Fe; chemical composition of rare earth metal The mass percentages are: cerium: 1%, neodymium: 11%, promethium: 4%, gadolinium: 7%, lutetium: 2%, dysprosium: 8%, lanthanum: 9%, and the balance is erbium.
[0049] The production process of the high-pressure steam turbine blade of the present embodiment, wherein:
[0050] The annealing process: after hot forging, heat preservation at 765°C for 16 minutes, then furnace cool to 258°C, heat preservation for 10 minutes, and finally cool to room temperature;
[0051] The tempering process: the tempering temperature is 703°C, and the temperature is kept for 15 minutes after reaching the temperature, and then air-cooled to room temperature; ...
Embodiment 2
[0061] This embodiment provides a high-pressure steam turbine blade, the mass percent of its chemical composition is: C: 0.021%, Si: 0.11%, Mn: 0.85%, Ni: 0.57%, Cr: 1.9%, Mo: 0.13%, Co : 4.1%, V: 4.28%, Nb: 0.03%, Cu: 0.05%, Al: 6.23%, N: 0.009%, Ti: 0.25%, rare earth metal: 0.10%, the balance is Fe; chemical composition of rare earth metal The mass percentages are: cerium: 3%, neodymium: 9%, promethium: 6%, gadolinium: 5%, lutetium: 4%, dysprosium: 6%, lanthanum: 11%, and the balance is erbium.
[0062] The production process of the high-pressure steam turbine blade of the present embodiment, wherein:
[0063] The annealing process: after hot forging, heat preservation at 767°C for 14 minutes, then furnace cool to 260°C, heat preservation for 8 minutes, and finally cool to room temperature;
[0064] The tempering process: the tempering temperature is 705°C, and the temperature is kept for 13 minutes after reaching the temperature, and then air-cooled to room temperature;
...
Embodiment 3
[0074] This embodiment provides a high-pressure steam turbine blade, the mass percent of its chemical composition is: C: 0.020%, Si: 0.10%, Mn: 0.84%, Ni: 0.56%, Cr: 1.8%, Mo: 0.12%, Co : 4.0%, V: 4.27%, Nb: 0.02%, Cu: 0.04%, Al: 6.22%, N: 0.008%, Ti: 0.24%, rare earth metal: 0.09%, the balance is Fe; chemical composition of rare earth metal The mass percentages are: cerium: 2%, neodymium: 10%, promethium: 5%, gadolinium: 6%, lutetium: 3%, dysprosium: 7%, lanthanum: 10%, and the balance is erbium.
[0075] The production process of the high-pressure steam turbine blade of the present embodiment, wherein:
[0076] The annealing process: after hot forging, keep warm at 766°C for 15 minutes, then furnace cool to 259°C, keep warm for 9 minutes, and finally cool to room temperature;
[0077] The tempering process: the tempering temperature is 704 ° C, and after reaching the temperature, it is kept for 14 minutes, and then air-cooled to room temperature;
[0078] The stress-relief...
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