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A high temperature resistant steam turbine blade and its production process

A steam turbine blade and production process technology, which is applied to the supporting elements of the blade, metal material coating process, mechanical equipment, etc., to achieve good comprehensive mechanical properties and corrosion resistance, weaken the segregation of alloy elements, and improve the effect of impact toughness.

Active Publication Date: 2016-08-17
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 completely release the internal stress of the blade after mechanical processing, avoid deformation or cracks in the subsequent high-temperature quenching and tempering heat treatment, thereby improving its high temperature resistance; how to ensure that the steam turbine blade has good hardness and stability Excellent properties such as toughness, ductility and machinability; how to improve the service life of steam turbine blades

Method used

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  • A high temperature resistant steam turbine blade and its production process
  • A high temperature resistant steam turbine blade and its production process
  • A high temperature resistant steam turbine blade and its production process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] This embodiment provides a high temperature resistant steam turbine blade, the chemical composition of the steam turbine blade is: C: 0.20%, Mn: 0.55%, Si: 0.20%, Al: 0.40%, V: 0.30%, Ti: 0.42% , Ni: 0.13%, Sn: 0.08%, Zr: 0.26%, S: 0.025%, P: 0.015%, Cu: 0.20%, lanthanide rare earth: 0.21%, and the balance is Fe;

[0077] The chemical composition of lanthanide rare earth components in mass percentage is: lanthanum: 15%, cerium: 21%, praseodymium: 21%, neodymium: 20%, dysprosium: 14%, other lanthanide elements: 9%, each group of above lanthanide rare earth The sum of the points is 100%.

[0078] The production process of the high temperature resistant steam turbine blade of the present embodiment is carried out according to the following procedures, and the specific operations are as follows:

[0079] (1) The selected weight percentage chemical composition is smelted, hot-rolled and cooled in a steel plant to make a steam turbine blade blank, and the blank is cut with a...

Embodiment 2

[0094] This embodiment provides a high temperature resistant steam turbine blade, the chemical composition of the steam turbine blade is: C: 0.21%, Mn: 0.57%, Si: 0.21%, Al: 0.38%, V: 0.32%, Ti: 0.40% , Ni: 0.14%, Sn: 0.06%, Zr: 0.25%, S: 0.010%, P: 0.009%, Cu: 0.10%, lanthanide rare earth: 0.22%, and the balance is Fe;

[0095] The chemical composition of lanthanide rare earth components in mass percentage is: lanthanum: 16%, cerium: 22%, praseodymium: 22%, neodymium: 19%, dysprosium: 13%, other lanthanide elements: 8%, each group of above lanthanide rare earth The sum of the points is 100%.

[0096] The production process of the high temperature resistant steam turbine blade of the present embodiment is carried out according to the following procedures, and the specific operations are as follows:

[0097] (1) The selected weight percentage chemical composition is smelted, hot-rolled and cooled in a steel plant to make a steam turbine blade blank, and the blank is cut with a...

Embodiment 3

[0112] This embodiment provides a high temperature resistant steam turbine blade, the chemical composition of the steam turbine blade is: C: 0.19%, Mn: 0.56%, Si: 0.22%, Al: 0.39%, V: 0.31%, Ti: 0.41% , Ni: 0.12%, Sn: 0.07%, Zr: 0.27%, S: 0.012%, P: 0.020%, Cu: 0.15%, lanthanide rare earth: 0.20%, and the balance is Fe;

[0113] The chemical composition of lanthanide rare earth components in mass percentage is: lanthanum: 17%, cerium: 23%, praseodymium: 20%, neodymium: 18%, dysprosium: 15%, and other lanthanide elements: 7%, each group of the above lanthanide rare earth The sum of the points is 100%.

[0114] The production process of the high temperature resistant steam turbine blade of the present embodiment is carried out according to the following procedures, and the specific operations are as follows:

[0115] (1) The selected weight percentage chemical composition is smelted, hot-rolled and cooled in a steel plant to make a steam turbine blade blank, and the blank is cu...

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Abstract

The invention discloses a high temperature resistant steam turbine blade. The chemical composition of the steam turbine blade is: C: 0.19-0.21%, Mn: 0.55-0.57%, Si: 0.20-0.22%, Al: 0.38-0.40%, V: 0.30‑0.32%, Ti: 0.40‑0.42%, Ni: 0.12‑0.14%, Sn: 0.06‑0.08%, Zr: 0.25‑0.27%, S≤0.025%, P≤0.025%, Cu≤0.20%, Lanthanide rare earth: 0.20‑0.22%, the balance is Fe; the present invention also designs the production process of changing the steam turbine blade, which is simple and low in cost, greatly improves the impact toughness of the blade, and improves the high temperature resistance of the blade , Nitriding surface treatment improves the service life of the blade.

Description

technical field [0001] The invention relates to a steam turbine blade and its production process, in particular to a high-temperature resistant steam turbine blade and its production process. Background technique [0002] The steam turbine is one of the three main engines of the thermal power plant. It is responsible for the main task of converting heat energy into mechanical energy. Its operation directly affects the efficiency of the heat engine and the safety of the unit. [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 key part of the steam turbine, and it is also one of the most precise and important parts. The working environment of steam turbine blades is complex and changeable. Under extremely harsh conditions, it bears the combined effects of high temperature, high pressure, huge centrifugal force, steam force, steam excitation force, corrosion and vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/14C22C38/16C21D9/00C23F17/00C23C8/26F01D5/28
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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