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A high-pressure resistant steam turbine blade and its production process

A technology for steam turbine blades and production processes, which is applied in manufacturing tools, heat treatment equipment, furnaces, etc., to achieve the effect of ensuring corrosion resistance, uniform and stable structure, and uniform structure

Active Publication Date: 2017-07-25
南京赛达科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problems to be solved by the present invention are: how to prevent the hardness of the blade from being too high or too low; The stress is completely released to avoid deformation or cracks in the subsequent high-temperature quenching and tempering heat treatment, thereby improving its high temperature and high pressure resistance; how to improve the water erosion resistance and corrosion resistance of the blade, thereby increasing the service life of the blade

Method used

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  • A high-pressure resistant steam turbine blade and its production process
  • A high-pressure resistant steam turbine blade and its production process
  • A high-pressure resistant steam turbine blade and its production process

Examples

Experimental program
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Effect test

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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Abstract

The invention relates to a high-pressure-resistant turbine blade. The chemical components of the high-pressure-resistant turbine blade include 0.019-0.021% of C, 0.09-0.11% of Si, 0.83-0.85% of Mn, 0.55-0.57% of Ni, 1.7-1.9% of Cr, 0.11-0.13% of Mo, 3.9-4.1% Co, 4.26-4.28% of V, 0.01-0.03% of Nb, 0.03-0.05% of Cu, 6.21-6.23% of Al, 0.007-0.009% of N, 0.23-0.25% of Ti, 0.08-0.10% of rare earth metal and the balance Fe. The invention further provides a production process for the high-pressure-resistant turbine blade. The impact toughness of the blade is greatly improved, the anti-water-erosion capacity and the corrosion resistance of the blade are improved, and the service life of the blade is prolonged.

Description

technical field [0001] The invention relates to a steam turbine blade and its production process, in particular to a high-pressure resistant steam turbine blade and its production process. Background technique [0002] A steam turbine is a rotary power machine that converts the energy of steam into mechanical work, also known as a steam turbine. It is mainly used as a prime mover for power generation, and it can also directly drive various pumps, fans, compressors and ship propellers, etc. It can also use the steam exhaust or intermediate extraction of steam turbines to meet the heating needs of production and life. Steam turbines are mainly used in electric power industry, shipbuilding industry, cement, chemical industry, petroleum, metallurgy, heavy machinery and other fields. [0003] The steam turbine is a rotary fluid power machine, which directly transforms the thermal energy of steam or gas into mechanical energy, and the blade is the "heart" of the steam turbine, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/52C21D9/00
Inventor 王河平孙彦颖李志伟周启东刘达宗国翼
Owner 南京赛达科技有限公司
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