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Materials for producing high pressure and low pressure joint rotor of steam turbine

A high-low pressure, steam turbine technology, applied in the field of materials for manufacturing steam turbine rotors, can solve problems such as the inability to meet the performance requirements of single-cylinder units

Active Publication Date: 2006-10-11
HARBIN TURBINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to solve the problem that the existing materials for manufacturing high and low pressure combined rotors of steam turbines cannot meet the performance requirements of current single cylinder units

Method used

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  • Materials for producing high pressure and low pressure joint rotor of steam turbine
  • Materials for producing high pressure and low pressure joint rotor of steam turbine

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Experimental program
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specific Embodiment approach 1

[0005] Specific Embodiment 1: The material used to manufacture the high and low pressure combined rotor of steam turbine in this embodiment is composed of the following components by weight percentage: C: 0.21-0.26%, Mn: 0.1-0.2%, Si: ≤0.05%, P: ≤0.005% , S: ≤0.005%, Cr: 2.2~2.55%, Ni: 1.3~1.55%, Mo: 1.1~1.35%, V: 0.2~0.31%, Cu: ≤0.05%, Al: ≤0.005%, Sn: ≤ 0.008%, Sb: ≤0.002%, As: ≤0.008%, and the balance is made of Fe. The manufacturing method of the material used to manufacture the high and low pressure combined rotor of the steam turbine in this embodiment is: smelting the above-mentioned components (electric furnace, double vacuum VCD)—forging—heat treatment after forging—performance heat treatment—inspection (conventional mechanical properties, short-term durability, Ultrasonic flaw detection) can be. After the rotor material is made, it is then machined to make the combined high and low pressure rotor of the steam turbine.

specific Embodiment approach 2

[0006] Specific embodiment two: The material used to manufacture the high and low pressure combined rotor of steam turbine in this embodiment consists of the following components by weight percentage C: 0.21%, Mn: 0.1%, Si: 0.03%, P: 0.001%, S: 0.001%, Cr: 2.2%, Ni: 1.3%, Mo: 1.1%, V: 0.2%, Cu: 0.01%, Al: 0.001%, Sn: 0.001%, Sb: 0.001%, As: 0.001%, and the balance is made of Fe become. Other methods are the same as in the first embodiment.

specific Embodiment approach 3

[0007] Specific embodiment three: The material used to manufacture the high and low pressure combined rotor of the steam turbine in this embodiment consists of the following components by weight percentage C: 0.26%, Mn: 0.2%, Si: 0.01%, P: 0.005%, S: 0.005%, Cr: 2.55%, Ni: 1.55%, Mo: 1.35%, V: 0.31%, Cu: 0.05%, Al: 0.005%, Sn: 0.007%, Sb: 0.002%, As: 0.008%, and the balance is made of Fe become. Other methods are the same as in the first embodiment.

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Abstract

The invention relates to a material for manufacturing turbine rotors, which comprises the following constituents (by weight percent): C 0.21-0.26%, Mn 0.1-0.2%, Si <=0.05%, P <=0.005%, S <=0.005%, Cr2.2-2.55%, Ni1.3-1.55%, Mo1.1-1.35%, V0.2-0.31%, Cu <=0.05%, Al <=0.005%, Sn <=0.008%, Sb <=0.002%, As <=0.008%, and balancing Fe.

Description

technical field [0001] The invention relates to a material for the manufacture of steam turbine rotors. Background technique [0002] The steam turbine high and low pressure joint rotor material has been used in the manufacture of steam turbine single-cylinder unit rotors in foreign countries in the late 1980s. The maximum unit capacity using this rotor is 300MW. However, the steam turbine high-low pressure combined rotor made of this high-low pressure combined rotor material of the steam turbine has the high-temperature enduring strength of the high-pressure side at the middle and lower limits of the traditional high-pressure material 30Cr1Mo1V steel; the yield strength of the low-pressure side is at R p0.2 650~690N / mm 2 , and FATT≤40℃, which cannot meet the performance requirements of the current single-cylinder unit. Contents of the invention [0003] The purpose of the invention is to solve the problem that the existing materials for manufacturing the combined high a...

Claims

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Application Information

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IPC IPC(8): C22C38/46F01D1/34
Inventor 赵阁玲孙福民白燕王梅英周玉梅杨其国刘长江吕智强孙广平李静李春风
Owner HARBIN TURBINE
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