■ Introduction:
Silicon nitride degassing pipe for aluminum casting is a kind of high temperature ceramic products, mainly used in high temperature, high pressure, strong corrosion environment exhaust system.For the removal of hydrogen in molten aluminum, Silicon nitride degassing pipe are used to put into nitrogen or argon.
■ Technical data sheet:
Properties | Unit | Data |
Si3 N4 Content | % | ≧92% |
Density | g/cm3 | ≧3. 1 |
Relative Density | g/cm3 | >99.6 |
Elasticity Modulus | Gpa | 300-500 |
Crushing Load Ratio | (25℃)% | ≧45 |
Hardness | (Hv)Mpa | 1800-2000 |
Fracture Toughness | Mpa•m1/2 | 7.0-8.5 |
Flexural Strength | Mpa | ≧600 |
Poisson Ratio | / | 0.25 |
Coefficient of linear expansion | 10-6 K- 1 | 3.2-3.4 |
Heat Conductivity | W•(M•K)- 1 | 20-25 |
Surface smoothness | / | ≤0.3 |
Electrical isolation | KV | ≧20 |
Acid&Alkali Resistance | / | excellent |
Magnetism | / | Without |
Working Temperature | ℃ | 1400 |
■ Advantages:
1. High hardness: the hardness of degassing pipe for aluminum casting is higher than steel, with better wear resistance.
2. Good shock resistance: Silicon nitride degassing tube can withstand large temperature changes without rupture.
3. Light weight: Lighter than steel, which helps to reduce the weight of the whole system.
4. Strong corrosion: Si3N4 Silicon Nitride tube can withstand strong acid, alkali and other corrosive media erosion.