Hardness: HV10 > 1500.
Flexural Strength: >980 MPa at room temperature, >350 MPa at 1200℃.
Thermal Expansion Coefficient: 3.1×10⁻⁶/°C.
Operating Temperature: Up to 1000℃ in air, up to 1400℃ in a protective atmosphere.
Common Specifications: φ20R8.5 mm, φ25R12.5 mm, φ35*R15.5 mm, etc..
Porosity: <0.5% (optimally 0.3%).
Product Introduction of Silicon Nitride Ceramic Welding Rollers
Silicon nitride ceramic welding rollers are high-performance industrial components with the following significant characteristics:
1. High Hardness and Wear Resistance: Vickers hardness reaches 1500-1600 HV, more than twice that of traditional high-speed steel rollers, and wear resistance is 2-3 times higher than that of cemented carbide.
2. High Strength: Bending strength at room temperature > 980 MPa, and still maintains over 350 MPa at 1200℃.
3. Excellent Thermal Stability: Thermal expansion coefficient is only 3.1 × 10⁻⁶/°C, and thermal shock resistance > 500℃ (ΔT).
4. High Temperature Resistance: Long-term working temperature can reach 1200-1600℃, and decomposition temperature reaches 1870℃.
5. Chemical Inertness: Extremely strong corrosion resistance to fluorine-based and chlorine-based plasmas and most acids and bases.
6. Functional Compatibility: Possesses both high thermal conductivity (20-30 W/(m·K)) and electrical insulation (resistivity > 10¹⁴ Ω·cm).
Application Fields
Silicon nitride ceramic welding rollers are mainly used in the following fields:
1. Metal pipe welding: Welding and processing of metal materials such as stainless steel pipes, aluminum pipes, and copper pipes.
2. Aerospace: Engine components, high-temperature furnace equipment.
3. Automotive manufacturing: Precision processing equipment under high temperatures.
4. Chemical industry: Corrosion-resistant and wear-resistant parts.
5. Electronics and power industry: Applications in non-magnetic environments.
Compared to traditional metal welding rollers, silicon nitride ceramic welding rollers offer the following advantages:
Comparison Items | Silicon nitride ceramic welding roller | Metal welding roller |
Service life | More than 10 times stronger than stainless steel. | Relatively short |
Operating temperature | Can reach 1000℃ | Generally, the temperature does not exceed 300℃. |
Wear resistance | Excellent, low wear rate. | generally |
Magnetic permeability | Non-magnetic | Usually magnetically conductive. |
Coefficient of thermal expansion | Low (3.1 × 10⁻⁶/°C) | Relatively high (~11-13 × 10⁻⁶/°C) |
Welding quality | High surface finish, no scratches or marks. | This may affect welding stability. |
Supports custom specifications.
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