Products
 (1)¦Õ0.8-50.8mm ball blanks, finished(G40-G5) balls
(2)hybrid bearings, with balls made of silicon nitride,
¡¡
and rings made of bearing steel or stainless steel.
(3)other Si3N4ceramic parts.
The Material Properties of the Bearing Balls Made in Shanghai Institute of Ceramics
Properties |
Materrial CH-30 |
Material CH-25 |
Density,g/cm3 |
3.25 |
3.30 |
Porosity,vol% |
<1 |
<1 |
3-point Bending Strength, MPa |
900 |
800 |
Fracture toughness,MPa¡¤m1/2 |
6 |
6 |
Hardness (Hv10),GPa |
15 |
15 |
Young¡¯s Modulus,GPa
(at room temperature) |
310 |
310 |
Thermal Conductivity,W/m¡¤K
|
25 |
25 |
Coefficient of Thermal Expension,
20-1000¡æ,10-6K-1 |
3.2 |
3.2 |
|
