High-Temp Carbon Sleeve (MF) for High-Grade NO
Designed for continuous annealing lines producing high-grade non-oriented silicon steel, this carbon sleeve ensures stable steel strip support at high temperatures up to 950°C. Its medium-fine graphite structure effectively resists roll nodulation and wear, solving the critical problem of surface defects. By providing excellent oxidation resistance and dimensional stability, it minimizes downtime and extends service life, offering a cost-effective solution for demanding silicon steel production.
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- Extended Campaign Life：With flexural strength ≥25 MPa and compressive strength ≥40 MPa, this carbon sleeve reliably withstands high strip tension and thermal stress, minimizing deformation and reducing unplanned replacement frequency.
Superior Oxidation Resistance:Ultra-low apparent porosity of ≤13% and bulk density of ≥1.78 g/cm³ create a dense microstructure that blocks oxidizing agents, significantly slowing material degradation in high-temperature environments.
Nodulation-Free Operation:Maximum pore size is strictly controlled to ≤0.1 mm, physically preventing oxide particles from embedding into the roller surface—ensuring consistent strip quality and reducing cleaning downtime.
Enhanced Strip Protection:Graphitization degree of 75–90% provides excellent self-lubricating properties, reducing friction against the steel strip to minimize surface scratches and improve final product yield.
Optimized Hardness Balance:Shore hardness of 35–50 HS delivers an ideal balance: hard enough to resist abrasive wear, yet soft enough to prevent mechanical damage to the strip surface during high-speed operation.
High-Temperature Stability:Specifically engineered for continuous use in dry atmospheres up to 950°C, this sleeve maintains dimensional stability and mechanical integrity under extreme thermal loads.
Uniform Structural Integrity:The homogeneous medium-fine structure eliminates internal weak points, ensuring consistent mechanical performance across the full roller length and reducing risk of premature failure.
Reduced Maintenance Requirements:Integrated anti-nodulation, anti-oxidation, and wear-resistant properties work together to minimize maintenance interventions, lowering operational costs and maximizing production uptime.
Proven Performance in Critical Applications:Extensively validated in high-grade non-oriented silicon steel annealing lines, delivering reliable, repeatable performance for demanding global steel producers.
Application
Heating Section of High-Grade NO Silicon Steel Lines:Positioned in the radiant tube heating zone where temperatures fluctuate between 850–950°C, this carbon sleeve maintains structural integrity under rapid thermal cycling—critical for producers running multiple high-grade NO grades on the same line without sacrificing surface quality.
Holding Zone for Thin-Gauge Electrical Steels:In the long soaking sections processing 0.20–0.25 mm fully processed electrical steels for high-efficiency motors, where strip stability is paramount, this sleeve provides consistent support without marking—enabling precise magnetic property development.
Dry Hydrogen Atmosphere Applications:Specifically suited for annealing sections using pure hydrogen or H₂-N₂ mixtures with dew points below -40°C, the medium-fine structure resists hydrogen attack while maintaining surface finish integrity throughout extended production campaigns.
Variable Speed Production Lines:On lines producing both high-grade and mid-grade NO steels with frequent speed changes (200–600 m/min), this sleeve’s stable friction coefficient ensures consistent strip tension control—reducing cobble risks during transitions.
Performance metrics | High-temperature carbon sleeve | Flexural strength/ MPa | ≥25 |
|---|---|
compressive strength/ MPa | ≥40 |
Apparent porosity/% | ≤13 |
Bulk density/ g·cm-3 | ≥1.78 |
Degree of graphitization/% | 75~90 |
Shore hardness/HS | 35~50 |
Maximum aperture size/mm | ≤0.1 |
Terms of use | Dry atmosphere below 950℃ |
Contacts
ADDRESS: 4578 Marmora Road, Glasgow, D04 89GR
PHONES: (800) 123-0045; (800) 123-0046</span
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