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Turbine blade capable of enhancing water corrosion resistance and production technique thereof

A steam turbine blade and production process technology, applied in the field of steam turbine blade and its production process, to achieve the effect of weakening the segregation of alloy elements and improving the impact toughness

Active Publication Date: 2014-09-24
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 o

Method used

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  • Turbine blade capable of enhancing water corrosion resistance and production technique thereof
  • Turbine blade capable of enhancing water corrosion resistance and production technique thereof
  • Turbine blade capable of enhancing water corrosion resistance and production technique thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] This embodiment provides a steam turbine blade capable of improving water erosion resistance. The mass percentages of chemical components are: 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 metals : 0.12%, the balance is Fe; the mass percentages of the chemical composition of rare earth metals are: 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 with improved water erosion resistance of this embodiment is carried out in the following steps: hot forging→annealing→tempering→blade machining→stress relief heat treatment→tempering heat treatment→cooling→surface strengthening heat treatment→physical and chemical inspection→ Ultrasonic flaw detection→clean pa...

Embodiment 2

[0066] This embodiment provides a steam turbine blade capable of improving water erosion resistance, the mass percentage of the 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 percentages of the chemical composition of rare earth metals are: 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 with improved water erosion resistance of this embodiment is carried out in the following steps: hot forging→annealing→tempering→blade machining→stress relief heat treatment→tempering heat treatment→cooling→surface strengthening heat treatment→physical and chemical inspection→ Ultrasonic flaw detection→clean...

Embodiment 3

[0079] This embodiment provides a steam turbine blade capable of improving water erosion resistance. The mass percentages of chemical components are: 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 percentages of the chemical composition of the rare earth metals are: 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 with improved water erosion resistance of this embodiment is carried out in the following steps: hot forging→annealing→tempering→blade machining→stress relief heat treatment→tempering heat treatment→cooling→surface strengthening heat treatment→physical and chemical inspection→ Ultrasonic flaw detection→clea...

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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 and a production process thereof capable of improving water erosion resistance. 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. Mainly used as a prime mover for power generation, it can also directly drive various pumps, fans, compressors and ship propellers, etc. It can also use steam turbine exhaust or intermediate extraction to meet the heating needs of production and life. Steam turbines are mainly used in power industry, shipbuilding industry, cement, chemical industry, petroleum, metallurgy, heavy machinery and other fields. [0003] A steam turbine is a rotary fluid power machine that directly converts the thermal energy of steam or gas into mechanical energy. The blade is the "heart" of the steam turbine and is an extremely...

Claims

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Application Information

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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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