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A steam turbine blade capable of improving water erosion resistance and its production process

A steam turbine blade and production process technology is applied in the field of steam turbine blades and their production process to achieve the effects of weakening the segregation phenomenon of alloy elements and improving impact toughness

Active Publication Date: 2015-12-30
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

[0005] The technical problems to be solved by the present invention are: how to make the hardness of the blade reach 277-311HB, and the hardness will not be too high or too low; After mechanical processing, the internal stress of the blade is completely released to avoid deformation or cracks caused by 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 steam turbine blade capable of improving water erosion resistance and its production process
  • A steam turbine blade capable of improving water erosion resistance and its production process
  • A steam turbine blade capable of improving water erosion resistance and its production process

Examples

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Effect test

Embodiment 1

[0053] This embodiment provides a steam turbine blade that can improve water erosion resistance, the mass percent of its chemical composition is: C: 0.26%, Si: 0.15%, Mn: 0.75%, Ni: 0.65%, Cr: 10.5%, Mo: 0.65%, V: 0.16%, Sr: 0.82%, Nb: 0.17%, Cu: 0.07%, Al: 0.24%, Ti: 0.13%, B: 0.06%, S: 0.03%, P: 0.01%, rare earth metal : 0.12%, the balance is Fe; the mass percentage of the chemical composition of rare earth metals is: cerium: 5%, praseodymium: 7%, neodymium: 10%, promethium: 5%, gadolinium: 2%, lutetium: 5%, dysprosium: 1%, europium: 5%, terbium: 10%, holmium: 1%, erbium: 2%, and the balance is lanthanum.

[0054] The production process of the steam turbine blade that can improve water erosion resistance in this embodiment is carried out according to the following procedures: hot forging→annealing→tempering→blade machining→stress relief heat treatment→tempering heat treatment→cooling→surface strengthening heat treatment→physical and chemical inspection→ Ultrasonic flaw dete...

Embodiment 2

[0066] This embodiment provides a steam turbine blade that can improve water erosion resistance, the mass percent of its chemical composition is: C: 0.27%, Si: 0.13%, Mn: 0.76%, Ni: 0.63%, Cr: 10.7%, Mo: 0.67%, V: 0.18%, Sr: 0.83%, Nb: 0.15%, Cu: 0.05%, Al: 0.26%, Ti: 0.15%, B: 0.07%, S: 0.02%, P: 0.02%, rare earth metals : 0.15%, the balance is Fe; the mass percentage of chemical composition of rare earth metals is: cerium: 6%, praseodymium: 8%, neodymium: 11%, promethium: 6%, gadolinium: 3%, lutetium: 6%, dysprosium: 2%, europium: 6%, terbium: 11%, holmium: 2%, erbium: 3%, and the balance is lanthanum.

[0067] The production process of the steam turbine blade that can improve water erosion resistance in this embodiment is carried out according to the following procedures: hot forging→annealing→tempering→blade machining→stress relief heat treatment→tempering heat treatment→cooling→surface strengthening heat treatment→physical and chemical inspection→ Ultrasonic flaw detecti...

Embodiment 3

[0079] This embodiment provides a steam turbine blade that can improve water erosion resistance, the mass percent of its chemical composition is: C: 0.28%, Si: 0.14%, Mn: 0.77%, Ni: 0.64%, Cr: 10.6%, Mo: 0.66%, V: 0.17%, Sr: 0.84%, Nb: 0.16%, Cu: 0.06%, Al: 0.25%, Ti: 0.14%, B: 0.08%, S: 0.01%, P: 0.03%, rare earth metals : 0.13%, the balance is Fe; the mass percentage of chemical composition of rare earth metals is: cerium: 7%, praseodymium: 9%, neodymium: 12%, promethium: 7%, gadolinium: 4%, lutetium: 7%, dysprosium: 3%, europium: 7%, terbium: 12%, holmium: 3%, erbium: 4%, and the balance is lanthanum.

[0080] The production process of the steam turbine blade that can improve water erosion resistance in this embodiment is carried out according to the following procedures: hot forging→annealing→tempering→blade machining→stress relief heat treatment→tempering heat treatment→cooling→surface strengthening heat treatment→physical and chemical inspection→ Ultrasonic flaw detecti...

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Abstract

The invention provides a turbine blade capable of enhancing water corrosion resistance, which comprises the following chemical components: 0.26-0.28% of C, 0.13-0.15% of Si, 0.75-0.77% of Mn, 0.63-0.65% of Ni, 10.5-10.7% of Cr, 0.65-0.67% of Mo, 0.16-0.18% of V, 0.82-0.84% of Sr, 0.15-0.17% of Nb, 0.05-0.07% of Cu, 0.24-0.26% of Al, 0.13-0.15% of Ti, 0.06-0.08% of B, at most 0.03% of S, at most 0.03% of P, 0.12-0.15% of rare-earth metal and the balance of Fe. The production technique can greatly enhance the impact toughness of the blade, enhance the water corrosion resistance and corrosion resistance of the blade and prolong the service life of the blade.

Description

technical field [0001] The invention relates to a steam turbine blade and a production process thereof, in particular to a steam turbine blade capable of improving water erosion resistance and a production process thereof. 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 th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/54C21D8/00C21D9/00C21D1/25C21D1/30C21D1/06
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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