A steam turbine blade capable of improving impact toughness and its production process

A steam turbine blade and production process technology, applied in the field of steam turbine blades and its production process, to achieve the effects of weakening the segregation of alloy elements, improving service life, and reducing or eliminating defects such as banded structures

Active Publication Date: 2016-04-13
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 problem to be solved by the present invention is: how to significantly weaken the alloy element segregation phenomenon of the blade, and greatly improve the impact toughness of the blade; Deformation or cracks, thereby improving its high temperature and high pressure resistance; thereby increasing the service life of the blade

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] This embodiment provides a steam turbine blade capable of improving impact toughness and its production process. The mass percentages of its chemical composition are: C: 0.13%, Si: 0.8%, Mn: 0.5%, Cr: 14%, Ni: 0.1 %, Cu: 1.3%, Mo: 0.6%, W: 0.1%, V: 0.36%, Nb: 0.5%, Al: 0.28%, Ti: 0.16%, B: 0.08%, Na: 0.45%, S: 0.02 %, P: 0.03%, rare earth metal: 0.3%, the balance is Fe;

[0047] The chemical composition mass percentage of rare earth metals is: Ce: 8%, Pr: 10%, Nd: 7%, Pm: 3%, Gd: 6%, Lu: 6%, Dy: 10%, Eu: 3%, Tb : 10%, Ho: 1.5%, Er: 2.5%, and the balance is La.

[0048] The production process of the steam turbine blade that can improve the impact toughness of this embodiment is carried out according to the following procedures: hot forging→annealing→tempering→blade machining→quenching and tempering heat treatment→cooling→surface strengthening heat treatment→ultrasonic flaw detection→clean packaging; : Annealing process: After hot forging, heat to 800°C and keep it for ...

Embodiment 2

[0055] This embodiment provides a steam turbine blade capable of improving impact toughness and its production process. The mass percentages of its chemical composition are: C: 0.15%, Si: 0.9%, Mn: 0.8%, Cr: 16%, Ni: 0.3 %, Cu: 1.5%, Mo: 1.1%, W: 0.15%, V: 0.45%, Nb: 0.8%, Al: 0.30%, Ti: 0.18%, B: 0.10%, Na: 0.48%, S: 0.01 %, P: 0.02%, rare earth metal: 0.6%, the balance is Fe;

[0056] The chemical composition mass percentage of rare earth metals is: Ce: 10%, Pr: 12%, Nd: 9%, Pm: 5%, Gd: 9%, Lu: 8%, Dy: 12%, Eu: 5%, Tb : 12%, Ho: 2.5%, Er: 3.5%, and the balance is La.

[0057] The production process of the steam turbine blade that can improve the impact toughness of this embodiment is carried out according to the following procedures: hot forging→annealing→tempering→blade machining→quenching and tempering heat treatment→cooling→surface strengthening heat treatment→ultrasonic flaw detection→clean packaging; : Annealing process: After hot forging, heat to 820°C for 20 minutes...

Embodiment 3

[0064] This embodiment provides a steam turbine blade that can improve impact toughness and its production process. The mass percentages of its chemical composition are: C: 0.14%, Si: 0.85%, Mn: 0.6%, Cr: 15%, Ni: 0.2 %, Cu: 1.4%, Mo: 0.68%, W: 0.12%, V: 0.38%, Nb: 0.6%, Al: 0.29%, Ti: 0.17%, B: 0.09%, Na: 0.46%, S: 0.008 %, P: 0.01%, rare earth metal: 0.5%, the balance is Fe;

[0065]The chemical composition mass percentage of rare earth metals is: Ce: 9%, Pr: 11%, Nd: 8%, Pm: 4%, Gd: 8%, Lu: 7%, Dy: 11%, Eu: 4%, Tb : 11%, Ho: 2%, Er: 2.8%, and the balance is La.

[0066] The production process of the steam turbine blade that can improve the impact toughness of this embodiment is carried out according to the following procedures: hot forging→annealing→tempering→blade machining→quenching and tempering heat treatment→cooling→surface strengthening heat treatment→ultrasonic flaw detection→clean packaging; : Annealing process: After hot forging, heat up to 810°C and hold for 18 ...

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PUM

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Abstract

The invention is a steam turbine blade which can improve the impact toughness. The mass percentage of its chemical composition is: C: 0.13-0.15%, Si: 0.8-0.9%, Mn: 0.5-0.8%, Cr: 14-16%, Ni: 0.1-0.3%, Cu: 1.3-1.5%, Mo: 0.6-1.1%, W: 0.1-0.15%, V: 0.36-0.45%, Nb: 0.5-0.8%, Al: 0.28-0.30%, Ti : 0.16-0.18%, B: 0.08-0.10%, Na: 0.45-0.48%, S≤0.02%, P≤0.03%, rare earth metal: 0.3-0.6%, the balance is Fe; the invention also provides The production process of the steam turbine blade with high toughness, the invention can greatly improve the impact toughness of the blade and improve 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 impact toughness 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 the "heart...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/54C21D8/00C21D9/00C21D1/25C21D1/06
Inventor 王河平孙彦颖李志伟周启东宗国翼刘达
Owner 南京赛达科技有限公司
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