Silicon Nitride material is one of the hardest materials in the
world with extrusion molding process and hot isostatic pressing
sintering adopted during the production. Its high strength, wear
resistance, temperature resistance, corrosion resistance, acid
resistance and alkali resistance can well ensure the purity of
materials. Silicon nitride has high strength and strong anti-fatigue
performance. In normal use, it is not easy to be damaged by slight
bumps, and it has a long service life after repeated use. The surface of silicon nitride is dense and does not infiltrate
with aluminum. When in use, the surface is only slightly hung with
aluminum, which is easy to clean and can prolong the cleaning
cycle. The product itself is sintered at high temperature and high
pressure, and the riser tube can still maintain compactness and air
tightness at high temperature, improving the quality of the
casting.
Produet introduction:
Riser tube is the critical part of low pressure die casting
process.During traditional production steel riser tube can not meet
the requirements of continuous production and high quality.So
silicon nitride becomes an ideal material of riser tubes due to its
1ow thermal expansion coefficient,good thermal shock resistance and
no wetting by molten metal.Its service life is more
than 10 times longer than traditional ones.
Temperature control is the most important factor to get good
casting products in die casting process. And heaters are used to
control the most suitable casting temperature. Thus silicon nitride
heater protection tubes can protect the heaters to avoid any
corrosion in non-ferrous metal industry and make the heating evenly
and rapidly.
Technical Parameters:
| Density (g/cm3) | 3.2-3.24 |
| Hardness (HRA) | 94.5 |
| Porosity (%) | 0.15% |
| Bending Strength (MPa) | 1154 |
| Coefficient of expansion (10-) | 3.2 |
| Fracture toughness (MPa·cm1/2 ) | 7.2 |
| Flexural strength | ≥ 800 mpa |
| Thermal Conductivity: | ≥20-25W |
| Lifespan : | ＞10 months in normal use |
Product advantages:
1. Silicon nitride has high strength and strong anti-fatigue
performance. In normal use, it is not easy to be damaged by slight
bumps, and it has a long service life after repeated use.
2. The surface of silicon nitride is dense and does not infiltrate
with aluminum. When in use, the surface is only slightly hung with
aluminum, which is easy to clean and can prolong the cleaning
cycle.
3. The product itself is sintered at high temperature and high
pressure, and the riser tube can still maintain compactness and air
tightness at high temperature, improving the quality of the
casting.
