High-Temp Composite Sleeve (CSNG) for High-Grade NO
Designed for the most demanding high-grade non-oriented silicon steel annealing lines, this CSNG isostatic composite carbon sleeve delivers exceptional performance from 950°C to 1100°C in dry atmospheres. Its advanced micro-pore structure (≤0.05 mm) virtually eliminates nodulation, while precisely controlled thermal expansion (4.0×10⁻⁶/K) prevents cracking during thermal cycling—solving the critical challenges of surface defects and premature failure in ultra-high temperature applications.
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Ultra-Fine Pore Structure for Nodulation-Free Operation：Maximum pore size is strictly controlled to ≤0.05 mm—half that of conventional sleeves—which physically prevents oxide particles from embedding into the roller surface, eliminating nodulation-induced strip defects and reducing cleaning downtime to near zero.
Matched Thermal Expansion for Thermal Shock Resistance:With a precisely engineered coefficient of thermal expansion of 4.0×10⁻⁶/K, this sleeve expands and contracts in harmony with the metal roll core during temperature cycles, preventing cracking and unplanned replacements caused by thermal stress.
Extended High-Temperature Capability:Designed for continuous operation from 950°C up to 1100°C in dry atmospheres, this composite sleeve withstands the most demanding high-grade silicon steel annealing processes, enabling producers to push process limits without component failure concerns.
Superior Density for Maximum Oxidation Protection:Ultra-low apparent porosity of ≤12% combined with bulk density of ≥1.80 g/cm³ creates an exceptionally dense matrix that blocks oxidizing agents, dramatically slowing material degradation and extending in-service life beyond standard solutions.
Enhanced Strength for High-Speed Line Reliability:Flexural strength of ≥28 MPa and compressive strength of ≥45 MPa provide the mechanical robustness needed for modern high-speed annealing lines operating under high strip tension, ensuring dimensional stability and consistent strip support.
Optimized Graphitization for Strip Surface Protection:Graphitization degree of 80–95% delivers superior self-lubricating properties that minimize friction against the steel strip, reducing surface scratches and protecting the magnetic properties of finished electrical steel.
Balanced Hardness for Wear Resistance Without Damage:Shore hardness of 40–55 HS strikes the optimal balance—sufficiently hard to resist abrasive wear from continuous strip contact, yet gentle enough to prevent mechanical marking on sensitive high-grade silicon steel surfaces.
Homogeneous Microstructure for Predictable Performance:CSNG isostatic pressing technology ensures uniform density and structure throughout the entire sleeve body, eliminating weak points and delivering consistent, repeatable performance across multiple installations and production campaigns.
Reduced Total Cost of Ownership Through Extended Campaigns:By combining nodulation prevention, oxidation resistance, thermal shock protection, and wear resistance into a single engineered solution, this sleeve minimizes maintenance interventions and replacement frequency—delivering measurable reductions in per-ton production costs.
Application
High-Speed Continuous Annealing Lines Exceeding 600 m/min:On modern high-speed facilities processing thin-gauge high-grade NO steels for EV traction motors, where increased line speed generates higher friction and thermal loads, this sleeve’s enhanced strength and thermal shock resistance ensure reliable operation without premature failure.
Pure Hydrogen Atmosphere Annealing Sections:In annealing furnaces utilizing 100% hydrogen atmospheres for improved magnetic properties, where hydrogen attack rapidly degrades conventional carbon materials, the ultra-dense CSNG structure effectively resists hydrogen penetration—maintaining mechanical integrity throughout extended campaigns.
Rapid Thermal Cycling Production Environments:For facilities that frequently change production schedules between different high-grade NO specifications, requiring repeated furnace temperature ramps, the precisely matched CTE of 4.0×10⁻⁶/K prevents thermal shock cracking—eliminating unplanned downtime during grade transitions.
Premium Automotive Electrical Steel Production Lines:In dedicated lines supplying fully processed high-grade NO steels to premium automotive OEMs for high-performance drive motors, where zero surface defects are mandatory, the ≤0.05 mm pore structure guarantees nodulation-free strip surfaces—protecting brand reputation and reducing scrap rates.
Integrated Steel Mill Complexes with Centralized Annealing:For large-scale steel operations running multiple high-grade NO grades through centralized continuous annealing facilities with varying temperature profiles, this composite sleeve offers broad process window compatibility—simplifying inventory management while ensuring consistent output quality.
Performance metrics | High temperature composite carbon sleeve | Flexural strength/ MPa | ≥28 |
|---|---|
compressive strength/ MPa | ≥45 |
Apparent porosity/% | ≤12 |
Bulk density/ g·cm-3 | ≥1.80 |
Degree of graphitization/% | 80~95 |
Shore hardness/HS | 40~55 |
Maximum aperture size/mm | ≤0.05 |
Coefficient of thermal expansion(X10-6/K) | 4.0 |
Terms of use | 950~1100℃，dry atmosphere |
Contacts
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PHONES: (800) 123-0045; (800) 123-0046</span
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