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Blade of steam turbine and process for machining blade

A technology for steam turbine blades and processing technology, which is applied to the supporting elements of blades, mechanical equipment, engine elements, etc., can solve the problems affecting production efficiency and production safety, complex and harsh use environment, and long production cycle, and achieve improvement. Effects of chemical and physical properties, reduction of overheat sensitivity and temper brittleness, and reduction of processing costs

Active Publication Date: 2014-09-10
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

[0002] Steam turbine blades are one of the most important parts. Due to the complex and harsh environment of use, there are many requirements for steam turbine blades, such as: corrosion resistance, wear resistance, oxidation resistance, etc., and the service life of steam turbine blades is directly Affecting production efficiency and production safety, its surface is mostly curved surface, complex processing, and long production cycle, so in order to improve production efficiency, reduce costs, ensure safe and reliable production, a stable and long service life is urgently needed Steam turbine blades, and the production method is more efficient than before, with lower cost, simpler operation and high processing efficiency.

Method used

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  • Blade of steam turbine and process for machining blade

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A steam turbine blade and its processing technology provided in this embodiment, the mass percentage of the chemical composition of the steam turbine blade is: C: 0.1%, Si: 0.5%, Mn: 0.3%, S: 0.01%, P: 0.1%, Cr: 12%, Ni: 0.02%, Cu: 0.1%, Mo: 0.2%, W: 0.05%, V: 0.33%, Nb: 0.5%, the rest is Fe and trace impurities; the steam turbine blade processing method is processed according to the following steps:

[0027] Step (1): First check the size of the fan-shaped arc blank, then first rough turn a plane, the depth is less than 5mm, then rough turn the inner circle and outer circle respectively, leave a machining allowance of 5mm on one side, and then perform annealing heat treatment, the annealing temperature At 850°C, first air cool to 700°C, then cool to room temperature in water;

[0028] Step (2): Then finish the size of the outer circle, inner circle and both ends of the car, install the arc blank on the wire cutting machine, process the arc surface 1 at both ends, and t...

Embodiment 2

[0033]A steam turbine blade and its processing technology provided in this embodiment, the mass percentage of the chemical composition of the steam turbine blade is: C: 0.5%, Si: 0.6%, Mn: 0.45%, S: 0.015%, P: 0.02%, Cr: 12.8%, Ni: 0.04%, Cu: 0.2%, Mo: 0.35%, W: 0.22%, V: 0.45%, Nb: 0.6%, the rest is Fe and trace impurities; the steam turbine blade processing method is processed according to the following steps:

[0034] Step (1): First check the size of the fan-shaped arc blank, then first rough turn a plane, the depth is less than 5mm, then rough turn the inner circle and outer circle respectively, leave a machining allowance of 5mm on one side, and then perform annealing heat treatment, the annealing temperature At 900°C, first air cool to 730°C, then cool to room temperature in water;

[0035] Step (2): Then finish the size of the outer circle, inner circle and both ends of the car, install the arc blank on the wire cutting machine, process the arc surface 1 at both ends, ...

Embodiment 3

[0040] A steam turbine blade and its processing technology provided in this embodiment, the mass percentage of the chemical composition of the steam turbine blade is: C: 0.1%, Si: 0.5%, Mn: 0.3%, S: 0.01%, P: 0.1%, Cr: 12%, Ni: 0.02%, Cu: 0.1%, Mo: 0.2%, W: 0.05%, V: 0.33%, Nb: 0.5%, the rest is Fe and trace impurities; the steam turbine blade processing method is processed according to the following steps:

[0041] Step (1): First check the size of the fan-shaped arc blank, then first rough turn a plane, the depth is less than 5mm, then rough turn the inner circle and outer circle respectively, leave a machining allowance of 5mm on one side, and then perform annealing heat treatment, the annealing temperature At 880°C, first air cool to 720°C, then cool to room temperature in water;

[0042] Step (2): Then finish the size of the outer circle, inner circle and both ends of the car, install the arc blank on the wire cutting machine, process the arc surface 1 at both ends, and t...

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Abstract

The invention discloses a blade of a steam turbine. The blade of the steam turbine comprises, by mass, 0.1-0.12% of C, 0.5-0.8% of Si, 0.3-0.6% of Mn, 0.01-0.02% of S, 0.1-0.022%Of P, 12-13% of Cr, 0.02-0.06% of Ni, 0.1-0.3% of Cu, 0.2-0.5% of Mo, 0.05-0.36% of W, 0.33-0.55% of V, 0.5-0.8% of Nb, the balance Fe and the balance trace impurities. The invention further provides a process for machining the blade of the steam turbine. The blade of the steam turbine and the process have the advantages that the blade of the steam turbine is long in service life and applicable to working in various harsh environments, the corrosion resistance, the abrasion resistance and the oxidation resistance of the blade can be improved, the cost can be reduced, the cutting property of the blade can be obviously improved, the machining cost can be reduced by the process, and the work efficiency can be enhanced by the process.

Description

technical field [0001] The invention relates to a steam turbine blade, in particular to a steam turbine blade and its processing technology. Background technique [0002] Steam turbine blades are one of the most important parts. Due to the complex and harsh environment of use, there are many requirements for steam turbine blades, such as: corrosion resistance, wear resistance, oxidation resistance, etc., and the service life of steam turbine blades is directly Affecting production efficiency and production safety, its surface is mostly curved surface, complex processing, and long production cycle, so in order to improve production efficiency, reduce costs, ensure safe and reliable production, a stable and long service life is urgently needed Steam turbine blades, and the production method is more efficient than before, with lower cost, simpler operation and high processing efficiency. Contents of the invention [0003] The technical problem to be solved by the present inv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/28B23P15/02
Inventor 孙彦颖王河平李志伟李亚辉刘达宗国翼
Owner 南京赛达科技有限公司
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