Components Restoration

UWCA use special technological processes in repair of aviation and ground equipment.

Vacuum restoration methods

Vacuum-plasma technology of high energy.

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Turbo compressor blades (-2 Covering)

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Jet blades (-11 Covering)

Electron-beam welding

Restoration of: flame tube for GTD-350 engine; outworn ridges on binding flanges of blades in 1st, 2nd, 3rd turbine stages of NK-8-2U and NK-16ST Engines; welding of bushing 375.33.0057 and nozzle 375.33.0058 in TV3-117EU Engines.

Soldering in protective atmosphere

Repair of guide wheel by 100% replacement of blades.

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Guide wheel of 7th stage in TV3-117 Engine.

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Guide wheel of 4th stage in TV2-117 Engine.

Gas-thermal processes

Plasma spatter

Thickening coatings , -10, and and 20 series.

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Rotor ring of 2nd compressor stage in NK-12ST engine, coating -10.

Thermo-barrier and anti-wear coatings on the basis of oxide zirconium with underlayer or -80.

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Platter of combustion chamber for NK-16ST engine (coating / oxide zirconium).

Coatings for restoration of parts geometrics (powder series -80, -10, , 2080, bronze powder -1901 etc.)

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Nozzle block of TV3-117 engine (coating 2080/)

Gas-plazma spatter

Restoration of:

  • Inner diameter of rotor rings in TV2-117,G and TV3-117 engines,
  • Outside surface of oil system block axes in TV3-117 engines
  • Inner diameter of Ist engine support frame in TV2-117,G engines,
  • Inner diameter of axial flow compressor in GTD-350 engines,
  • Sealing slots of compressor frame in GTD-350 engines.
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Frame of 1st engine support, TV2-117A, AG

Electric-erosion alloying, hardening and spattering

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Shaft of freewheeling clutch for VR-8 Main Gearbox. Restoration of cemented stages tear, restored wear O 85 (after testing).

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Spring of main actuator 7942.2460 in TV2-117,G engines. Restoration of slots wear.

Thermal and chemical-thermal treatment.

Cementation, nitriding, calorizing.

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Combustion chamber of NK-12ST engine. High-temperature annealing.

Surface-plastic hardening by microbeads and beads.

Parts hardening:

  • Oblique-spur gears in VR-8 and VR-14 Main Gearboxes;
  • Blades of compressor rotor 1st stage in TV3-117 Engines;
  • Turbine disks of I, II, III stages in NK-16ST Engines;
  • Working sections of turbine blades in NK-12ST and NK-16ST Engines;
  • Working sections of gas turbine blades GTK-10-4.

 

Electrodeposits

Galvanic shop of UWCA implements more than 20 technological processes for steel and nonferrous metals works.

 

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Hard chrome plating

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Anodic oxide coating

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Zinc-coating

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Chemical phosphate coating

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Cadmium plating

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Copper plating process

New technologies of parts repair

Our Plant has developed and successfully uses: the unique technological processes for restoration of rotor compressor parts geometrics in TV2-117, G and TV3-117 Engines; technological processes of protective erosion resistant coatings spraying.

Restoration of blades geometrics by argon arc welding.

Rotor compressor blade of 1st stage in V3-117 Engine. After operation with wear of entrance edge, restored with welding method — and after restoration and mechanical treatment.

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To confirm the operability of blades restored by argon arc welding, the following tests were made:

  • Continuous tests on technological engine
  • Fatigue tests of blades

 

On the basis of results the following documents were released:

  1. Resolution 404-03-01 dated 25.03.2004
  2. Resolution 404-01-08 dated 27.11.2008

 

Protection of compressor air-gas channel parts from erosive wear.

Erosion resistant protective coating -7

Ion-plasma spraying. Implantation hardening and surface modification.

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Layer thickness — from 30 nm.

Main features of coating:

  • Multilayer structure with alternation of damping layers and solid nitride layers;
  • Don’t decrease fatigue durability of basic material;
  • High adhesion with base;
  • Erosion durability increases minimally at 2 times;
  • In general climatic conditions is possessed of high erosion durability.

To confirm the operability of coating the following tests were made:

  • Erosion tests of blades at TV2-117, G and TV3-117 Engines;
  • Fatigue tests of compressor blades at TV2-117, G Engines (OJSC Perm Engine Company);
  • Fatigue tests high-pressure compressor blades at PS-90 (OJSC Perm Engine Company);
  • Tests for detection fatigue limits of 1st stage blades at TV3-117 (JSC KLIMOV);
  • Research under influence of multilayer erosion-resistant and corrosion-resistant coatings on service capabilities of steel 961 and alloy 8 (Russian R&D Institute of Aviation Materials).

 

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On the basis of results the following documents were released:

  1. Additional data for passport 330 of steel 961;
  2. Additional data for passport 327 of steel 8-1;
  3. Bulletin 79-917-;
  4. Bulletin 78-032, 78-036.