Stellite Alloy Hardfacing Service for Steam Turbine Spare Parts with High-Temperature Erosion Resistance, Wear Resistance, and Customized Stellite Grades
Price:
Negotiable
MOQ:
Negotiable
Delivery Time:
Negotiable
Product Description
Stellite Alloy Hardfacing Service for Steam Turbine Spare Parts
High-temperature steam turbine components such as valve seats, valve plugs, bushings, nozzle rings and blade sealing strips suffer severe damage from high-speed steam scouring, particle erosion, repeated opening-closing friction, thermal fatigue and high-temperature oxidation during long-term operation.
Stellite cobalt-based alloy hardfacing is the most mature and reliable surface strengthening technology widely adopted in the power industry. By overlaying Stellite alloy on the sealing and wear surfaces of turbine spare parts, we significantly improve hardness, wear resistance, high-temperature erosion resistance and anti-fatigue performance, effectively reduce steam leakage and extend component service life.
We provide professional customized Stellite hardfacing processing for new turbine forgings and on-site rework & repair for used spare parts. Our surfacing technology ensures uniform overlay layers, low dilution rate, excellent metallurgical bonding between overlay and base material, and avoids common defects such as cracks, pores and peeling.
Applicable Turbine Spare Parts
- Steam Turbine Valve Series: Valve Seat, Valve Plug, Valve Disc, Valve Stem Bushing, Control Valve & Main Stop Valve sealing surfaces
- Flow Passage Components: Nozzle, Diaphragm, Labyrinth Sealing Strip, Blade Tip Sealing
- Other Wear-resistant Parts: Shaft Sleeve, Wear Ring, Thrust Collar
Available Stellite Grades
| Grade | Properties & Applications |
|---|---|
| Stellite 6 | Universal grade. Balanced wear resistance, erosion resistance and impact resistance. Widely used for valve sealing surfaces under medium & high temperature conditions. |
| Stellite 12 | Higher hardness, superior anti-scouring performance. Suitable for components enduring intense steam erosion and particle impact. |
| Custom Grades | Other customized cobalt-based alloy grades available on request. |
Base Material Adaptability
We support hardfacing on various heat-resistant steel substrates: 42CrMo, 25Cr2MoV, 12Cr1MoV, F91, F92, stainless steel and other turbine dedicated alloy steels.
Complete Processing Flow
- Pre-inspection of workpiece -> Non-destructive testing of base material
- Surface pretreatment: Rust removal, grinding, cleaning to eliminate impurities
- Preheating treatment (strict temperature control to prevent cold cracking)
- Automatic / Manual Stellite alloy overlay welding
- Stress relief heat treatment after surfacing
- Precision machining (turning, boring, grinding) to drawing dimensions
- Layer inspection: Visual inspection, PT penetration test, hardness test, thickness measurement
- Final dimension inspection & delivery
Core Advantages
Stable Surfacing Quality
Low dilution rate of the overlay layer; uniform, dense weld bead structure. No cracks, slag inclusion or porosity. Perfect metallurgical combination prevents layer peeling under alternating temperature loads.
Low dilution rate of the overlay layer; uniform, dense weld bead structure. No cracks, slag inclusion or porosity. Perfect metallurgical combination prevents layer peeling under alternating temperature loads.
Outstanding High-temperature Performance
Stellite alloy maintains high hardness at continuous high temperature. Strong resistance to high-temperature steam erosion, abrasion, oxidation and thermal fatigue, greatly lowering steam leakage of valve assemblies.
Stellite alloy maintains high hardness at continuous high temperature. Strong resistance to high-temperature steam erosion, abrasion, oxidation and thermal fatigue, greatly lowering steam leakage of valve assemblies.
Cost-saving Solution
For brand-new components: Improve service life and reduce spare part replacement frequency.
For old failed parts: Repair & re-hardfacing can realize part reuse, greatly cutting procurement and shutdown maintenance costs.
For brand-new components: Improve service life and reduce spare part replacement frequency.
For old failed parts: Repair & re-hardfacing can realize part reuse, greatly cutting procurement and shutdown maintenance costs.
Strict Quality Control
Each batch can provide hardness reports, penetration testing (PT) records, overlay thickness inspection data. All processes comply with power industry manufacturing standards.
Each batch can provide hardness reports, penetration testing (PT) records, overlay thickness inspection data. All processes comply with power industry manufacturing standards.
Flexible Customization
Support processing of newly manufactured forgings as well as overhaul repair of old turbine spare parts. We can adjust overlay thickness, alloy grade and technical scheme according to customers' working conditions.
Support processing of newly manufactured forgings as well as overhaul repair of old turbine spare parts. We can adjust overlay thickness, alloy grade and technical scheme according to customers' working conditions.
Application Scenarios
- Thermal power steam turbine units
- Cogeneration & heating turbines
- Waste heat recovery power plant turbines
- Biomass & garbage power generation turbines
- Industrial steam turbines
Standards
Executable standards: ISO, ASTM, DL/T power industry standards, and customers' special technical specifications.
Information Needed for Quotation
- Component drawing or physical photos
- Workpiece base material
- Required Stellite grade (Stellite 6 / Stellite 12, etc.)
- Required overlay thickness
- Service type: New part surfacing / Old part repair surfacing
- Testing requirements (PT, hardness testing etc.)
- Quantity and required lead time
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Chongqing Huanxiang Industrial. Co., Ltd.
Location
Floor 3,No.228,Liang Gang Avenue of Hui Xing Street,Yubei District,Chongqing of China 401120
Contact Person
Tom Hu