99 porcelain wear-compression resistant ceramic positioning pin
Product Overview
Positioning pins are most widely used in molds. Including stamping
molds, injection molds and so on. Their precision is particularly
high, and if it is only fixed by bolts, it will definitely not
work, so only positioning pins are used to achieve positioning
Alumina has a high hardness and density, with an Inch hardness of
9, which is slightly lower than diamond. The bulk density is
generally greater than 3.5 g/cm³, and some can reach 4.0g/cm³.
Alumina ceramics are divided into 99 porcelain, 95 porcelain, 90
porcelain, 85 porcelain and other varieties according to different
Al2O3 content. Among them, 99 alumina ceramic materials are used to
make high-temperature crucibles, refractory furnace tubes and
special wear-resistant materials, such as ceramic bearings and
ceramic seals. Parts, etc.; 95 alumina ceramics are mainly used as
corrosion-resistant and wear-resistant parts.
Widely used in coal-fired power plants, iron and steel, smelting,
machinery, coal, mining, chemical, cement, port and terminal
enterprises, coal transportation, conveying system, powder milling
system, ash discharge, dust removal system and other large wear and
tear mechanical equipment , Can provide different types of products
according to different needs
Product parameter table
Material
Project | Alumina AL203 | Silicon carbide sic | Silicon nitride sin | Silicon nitride sin |
| Color | Ivory | black | black | Milky white, gray black |
| Content(%) | 99.5 | …… | …… | …… |
| Main features | - Excellent high frequency electrical insulation
Good wear resistance preservative Strong High hardness
| - Good high temperature strength
- High thermal conductivity
- Strong alkali resistance
- Wear-resistant
- Lightweight
| - Good high temperature strength
- Strong impact resistance
- Strong corrosion resistance
- Lightweight
| - High strength and high impact resistance
- Good self-lubricating
- Strong alkali resistance
- Smooth surface
- Good toughness
|
| The main purpose | - Wear parts
- High temperature parts
- Corrosion resistant parts
| - Machinery Seal
- Sliding parts
- High temperature parts
| - Molten metal parts
- Metal plasticity
- Processed parts
| - Industrial knives
- Pump parts
- Wear parts
|
| Density | Kg/m³ | 3.9*10 | 3.16*10 | 3.3*10 | 6.0*10 |
Mechanical behavior
| Vickers hardness | Gpa | 16.0 | 23.0 | 14.0 | 13.2 | 12.7 |
| Flexural strength | Mpa | 360 | 450 | 1020 | 1000 | 1470 |
| Compressive strength | Mpa | 2350 | …… | …… | …… | …… |
| Fracture toughness | Mpa | 4 | 2-3 | 7 | 4-5 | 4-5 |
Thermal performance
| Linear expansion coefficient | 40-400℃ | ×10-5/℃ | 7.2 | 3.7 | 2.8 | 10.5 | 10.8 |
| 40-800℃ | 8.0 | 4.4 | 3.3 | 11.0 | 11.3 |
| Thermal conductivity | W/(m·k) | 32 | 200 | 27 | 3 | 3 |
| Specific heat | J/(kg·k) | 0.78*10 | 0.67*10 | 0.65*10 | 0.46*10 | 0.46*10 |
| Thermal shock resistance (in water) | ℃ | 250 | …… | ＞800 | 300 | 350 |
| Electrical performance | Dielectric strength | V/m | 15*105 | …… | 13*105 | 11*105 | …… |
| Volume resistance(20℃) | Ω·cm | ＞1014 | 108 | 1014 | 1013 | …… |
| Dielectric constant | …… | 9.6 | …… | 9.9 | 33 | …… |
| Loss factor | ×10-4 | 10 | …… | …… | 520 | …… |
Product advantages
• Size and thermal stability
• High performance features
• Hydrolysis resistance
• Self-lubricating performance
• Extended service life
The ceramic positioning pin has extremely strong corrosion
resistance, and can also be used in strong acid, strong alkali and
sea water. At 1100 ℃, the strength and hardness are almost
unchanged. Can also be used in non-magnetic and magnetic fields.
Electrical insulation. The density is 3.25---3.28g/cm3, light
weight, about 60% lighter than the steel ball, which greatly
reduces the centrifugal force on the channel when the bearing
rotates at high speed and reduces wear. High rigidity, high
strength, its hardness is twice as high as bearing steel, and the
elastic modulus is about 1/3 higher. The coefficient of linear
expansion is 3.2×10-6/K, which is almost 1/4 of the bearing steel,
and can withstand the rapid changes in temperature.
Applications
- Shipbuilding, bridges, large-scale structural facilities
- Lighting industry
- Electronics and electric heating industry
With the development of science and technology and the improvement
of manufacturing technology, new varieties continue to appear, and
they will be used more and more in the fields of modern industry
and modern science.
Product Picture
Product packaging
Packed in carton
FAQ
1. Are you a businessman or a manufacturer?
We are a company, we have our own factory
2. How long is your delivery time?
Negotiable
3. Can the product be customized?
Can be customized
4. What is the product packaging?
Carton or according to customer requirements
