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A kind of corrosion-resistant steam turbine blade and its production process

A steam turbine blade and production process technology, applied in the direction of blade support components, mechanical equipment, manufacturing tools, etc., to achieve the effect of weakening the segregation of alloy elements and improving the impact toughness

Active Publication Date: 2016-02-10
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

[0007] The technical problem to be solved by the present invention is: how to make the hardness of the blade reach 281-307HB, and the hardness will not be too high or too low; 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 kind of corrosion-resistant steam turbine blade and its production process
  • A kind of corrosion-resistant steam turbine blade and its production process
  • A kind of corrosion-resistant steam turbine blade and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A corrosion-resistant steam turbine blade provided in this embodiment has the following mass percentages of chemical components: C: 0.31%, Si: 0.11%, Mn: 0.69%, Ni: 0.61%, Cr: 96%, V: 0.15%, Nb: 0.16%, Cu: 0.07%, Al: 0.22%, Ti: 0.13%, Sb: 0.77%, Co: 0.82%, S: 0.03%, P:: 0.01%, rare earth metal: 0.09%, and the balance is Fe;

[0049] The chemical composition mass percentage of rare earth metals is: cerium: 7%, praseodymium: 8%, neodymium: 14%, gadolinium: 7%, dysprosium: 4%, europium: 1%, terbium: 11%, holmium: 6%, Yu The amount is lanthanum.

[0050] Terbium: 10%, holmium: 4%, and the balance is lanthanum.

[0051] The production process of the corrosion-resistant steam turbine blade provided in this example is carried out according to the following procedures: hot forging→annealing→blade mechanical processing→stress relief heat treatment→quenching and tempering heat treatment→surface strengthening heat treatment→physical and chemical inspection→ultrasonic flaw detect...

Embodiment 2

[0060] A corrosion-resistant steam turbine blade provided in this embodiment has the following mass percentages of chemical components: C: 0.29%, Si: 0.12%, Mn: 0.72%, Ni: 0.62%, Cr: 9.7%, V: 0.16%, Nb: 0.18%, Cu: 0.05%, Al: 0.23%, Ti: 0.14%, Sb: 0.75%, Co: 0.87%, S: 0.0:2%, P≤0.02%, rare earth metal: 0.12%, balance is Fe;

[0061] The chemical composition mass percentage of rare earth metals is: cerium: 8%, praseodymium: 6%, neodymium: 15%, gadolinium: 5%, dysprosium: 2%, europium: 3%, terbium: 9%, holmium: 5%, Yu The amount is lanthanum.

[0062] The production process of the corrosion-resistant steam turbine blade provided in this example is carried out according to the following procedures: hot forging→annealing→blade mechanical processing→stress relief heat treatment→quenching and tempering heat treatment→surface strengthening heat treatment→physical and chemical inspection→ultrasonic flaw detection→clean packaging; wherein:

[0063] After hot forging, the temperature i...

Embodiment 3

[0071] A corrosion-resistant steam turbine blade provided in this embodiment has the following mass percentages of chemical components: C: 0.30%, Si: 0.13%, Mn: 0.73%, Ni: 0.60%, Cr: 9.5%, V: 0.17%, Nb: 0.17%, Cu: 0.06%, Al: 0.21%, Ti: 0.15%, Sb: 0.76%, Co: 0.88%, S: 0.0:25%, P: 0.015%, rare earth metal: 0.11%, balance is Fe;

[0072] The chemical composition mass percentage of rare earth metals is: cerium: 9%, praseodymium: 7%, neodymium: 13%, gadolinium: 6%, dysprosium: 3%, europium: 2%, terbium: 10%, holmium: 4%, Yu The amount is lanthanum.

[0073] The production process of the corrosion-resistant steam turbine blade provided in this example is carried out according to the following procedures: hot forging→annealing→blade mechanical processing→stress relief heat treatment→quenching and tempering heat treatment→surface strengthening heat treatment→physical and chemical inspection→ultrasonic flaw detection→clean packaging; wherein:

[0074] After hot forging, the temperatu...

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Abstract

The invention discloses a corrosion-resistant turbine blade which comprises the following chemical components in percentage by mass: 0.29-0.31 percent of C, 0.11-0.13 percent of Si, 0.69-0.73 percent of Mn, 0.60-0.62 percent of Ni, 9.5-9.7 percent of Cr, 0.15-0.17 percent of V, 0.16-0.18 percent of Nb, 0.05-0.07 percent of Cu, 0.21-0.23 percent of Al, 0.13-0.15 percent of Ti, 0.75-0.77 percent of Sb, 0.82-0.88 percent of Co, less than or equal to 0.03 percent of S, less than or equal to 0.02 percent of P, 0.09-0.12 percent of rare earth metals and the balance of Fe. The water erosion resistance and corrosion resistance of the blade can be improved, so that the service life of the blade is prolonged.

Description

technical field [0001] The invention relates to a steam turbine blade and a production process thereof, in particular to a corrosion-resistant steam turbine blade and a production process thereof, belonging to the field of steam turbine manufacturing. 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 mechanica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/60C21D9/00F01D5/28B23P15/02
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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