Silicon nitride ceramic punch

Silicon Nitride Ceramic Punch Product Introduction

Silicon nitride ceramic punches are high-performance ceramic products made of materials with strong covalent bonds, possessing the following significant characteristics:

1. High hardness and high strength: Hardness can reach HRA 91-93, and flexural strength is >490 MPa, making it one of the hardest materials in the world.

2. Excellent thermal performance: Low thermal expansion coefficient (3.2 × 10⁻⁶/℃), high thermal conductivity (20-25 W/(m·K)), and excellent thermal shock resistance (ΔT > 800℃).

3. Superior chemical stability: Resistant to corrosion from almost all inorganic acids and caustic soda solutions below 30%, and forms a protective SiO₂ layer in oxidizing environments.

4. High-temperature performance: Can be used up to 1200℃ in air and up to 1400℃ in a protective atmosphere.

Product Features

1. Corrosion Resistance: In a 3.5% NaCl solution, the average annual corrosion depth is only 0.02 μm, which is four orders of magnitude lower than that of 316 stainless steel.

2. Wear Resistance: Hardness HV ≥ 1500, and the performance remains stable in environments with abrasive particle media.

3. Lightweight: Density is approximately 3.2 g/cm³, significantly reducing component inertia.

4. Thermal Shock Resistance: Can withstand rapid heating and cooling conditions (ΔT > 800℃) without easily cracking.

5. Long Lifespan: In high-pressure seawater erosion tests, the edge wear after 1000 hours of operation is only 3-5 μm.

Application Fields

Silicon nitride ceramic plungers are widely used in various industrial fields:

1. Mechanical manufacturing: Valves, pipes, classifying wheels, ceramic cutting tools, bearing balls, etc.

2. Metallurgical industry: High-temperature mold components, stamping tools.

3. Chemical equipment: Corrosion-resistant pump bodies, sealing rings, heat exchanger components.

4. Aerospace: Engine bearings, high-temperature structural components.

5. Electronics and semiconductors: Thermal conductive substrates, precision machining tools.

Supports custom specifications.