An anti-oxidation and low-wear steam turbine blade steel profile and its preparation process

A steam turbine blade, low-wear technology, applied in metal material coating process, polyurea/polyurethane coatings, anti-corrosion coatings, etc., can solve problems such as blade breakage, impact on unit safety and reliability, and grade efficiency decline, and achieve coating combination. Strong strength, improve fatigue resistance and physical and chemical properties, prolong use efficiency and life effect

Active Publication Date: 2021-12-10
周灿
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Damage to the moving blades will not only reduce the efficiency of the stage, but also cause the breakage of the blades due to water erosion, which will cause the unit to vibrate, and the moving blades will also bear very complex exciting forces, which will greatly affect the safety and reliability of the unit

Method used

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  • An anti-oxidation and low-wear steam turbine blade steel profile and its preparation process
  • An anti-oxidation and low-wear steam turbine blade steel profile and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] An anti-oxidation and low-wear steel profile for steam turbine blades, including a blade body and a multi-coating layer coated on the outer layer of the blade body in sequence, the multi-coating layer is a wear-resistant strengthening layer and a repairing protective layer, and the wear-resistant strengthening layer is Ni-Ti - Co-Si-Al-Cu coating, the repair protection layer is a rare earth-containing polyurethane-based coating. The wear-resistant reinforced layer is prepared by laser cladding, and the thickness of the wear-resistant reinforced layer is 1 mm; the repaired protective layer is prepared by dipping, and the thickness of the repaired protective layer is 3 mm.

[0033] The blade body includes the following mass percentage components: C 0.8%, Cr 9.4%, Ni0.7%, Mn 0.45%, Si 0.5%, W 0.8%, Co 1.2%, V≤0.2%, P≤0.03%, S≤0.03%, Fe balance.

[0034] The mass percent content of each component in the wear-resisting strengthening layer is: Ti 5%, Co 20%, Si 5%, Al 16%, C...

Embodiment 2

[0047] An anti-oxidation and low-wear steel profile for steam turbine blades, including a blade body and a multi-coating layer coated on the outer layer of the blade body in sequence, the multi-coating layer is a wear-resistant strengthening layer and a repairing protective layer, and the wear-resistant strengthening layer is Ni-Ti - Co-Si-Al-Cu coating, the repair protection layer is a rare earth-containing polyurethane-based coating. The wear-resistant strengthening layer is prepared by laser cladding, and the thickness of the wear-resistant strengthening layer is 3mm; the repairing protective layer is prepared by dipping, and the thickness of the repairing protective layer is 3mm.

[0048] The blade body includes the following mass percentage components: C 0.95%, Cr 9.5%, Ni0.6%, Mn 0.4%, Si 0.4%, W 1.0%, Co 1.4%, V≤0.2%, P≤0.03%, S≤0.03%, Fe balance.

[0049] The mass percent content of each component in the wear-resisting strengthening layer is: Ti 8%, Co 25%, Si 10%, Al...

Embodiment 3

[0062] An anti-oxidation and low-wear steel profile for steam turbine blades, including a blade body and multi-coatings sequentially coated on the outer layer of the blade body. layer, wear-resistant strengthening layer, the wear-resistant strengthening layer is a Ni-Ti-Co-Si-Al-Cu coating, and the repairing protection layer is a rare earth-containing polyurethane-based coating. The wear-resistant reinforced layer is prepared by laser cladding, and the thickness of the wear-resistant reinforced layer is 1 mm; the repaired protective layer is prepared by dipping, and the thickness of the repaired protective layer is 5 mm.

[0063] The blade body includes the following mass percentage components: C 0.9%, Cr 9.25%, Ni0.7%, Mn 0.35%, Si 0.4%, W 0.9%, Co 1.3%, V≤0.2%, P≤0.03%, S≤0.03%, Fe balance.

[0064] The mass percent content of each component in the wear-resisting strengthening layer is: Ti 3%, Co 15%, Si 6%, Al 20%, Cu 6%, and Ni balance.

[0065] The parts by weight of ea...

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Abstract

The invention proposes an anti-oxidation and low-wear steam turbine blade steel profile and its preparation process. The steam turbine blade includes a blade body and multi-coating layers sequentially coated on the outer layer of the blade body, and the multi-coating layer is a wear-resistant strengthening layer. , repair protective layer, or wear-resistant strengthening layer, repair protective layer, wear-resistant strengthening layer, described wear-resistant strengthening layer is Ni-Ti-Co-Si-Al-Cu coating, and described repair protective layer is containing rare earth Polyurethane-based coating, the invention effectively improves the fatigue resistance and physical and chemical properties of the blade through the optimal selection of the blade body material and the surface layer strengthening and protective treatment, and improves the working efficiency and life under wet steam conditions. , Yield strength, impact resistance and corrosion resistance are significantly improved.

Description

technical field [0001] The invention relates to the technical field of steam turbine blade materials, in particular to an oxidation-resistant and low-wear steam turbine blade steel profile and a preparation 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 can also directly drive various pumps, fans, compressors and ship propellers. It is also possible to use the exhaust steam or intermediate steam extraction of the steam turbine to meet the heating needs of production and life. [0003] The last-stage blades of the steam turbine in a thermal power plant are usually located in the low-pressure cylinder of the steam turbine. Since this is the wet steam area, the blades are subjected to tensile stress caused by centrifugal force, bending stress and torsional stress caused by the pressure of s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C33/06C22C38/02C22C38/04C22C38/44C22C38/46C22C38/52C23C24/10C22C30/02C22C19/03C09D175/04C09D7/61C09D7/63C09D7/65C09D5/08
CPCC22C33/06C22C38/04C22C38/02C22C38/44C22C38/52C22C38/46C22C38/002C22C19/03C22C30/02C23C24/103C22C19/07C09D175/04C09D7/61C09D7/63C09D7/65C09D7/70C09D5/08C09D5/18C08K2003/221C08K2201/011C08K2003/385C08K2003/085C08L2201/08C08K13/04C08K7/10C08K3/22C08K3/08C08K5/098C08K3/38
Inventor 戴王兵
Owner 周灿
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