Sialon Extrusion dies

Introducing a new line of sialons (a superior class of ceramics compared to silicon nitride) advanced ceramic extrusion and drawing dies.

At the same time, we introduce our new ultrasonic extrusion dies technology. The combination of this new sialon silicon nitride ceramic die and the ultrasonic technology will result in a up to 70% FASTER production compared to non-ultrasonic treatment.

Silicon Nitride ceramic extrusion dies are used for the extrusion and drawing of non-ferrous alloys in the metal extrusion industry.

With regards to Sialon ceramics, there is substitution of silicon by aluminum with corresponding atomic replacement of nitrogen by oxygen, to satisfy valency requirements.

The resulting ‘solution’ has superior properties to the original pure solvent, syalon, silicon nitride or Si3N4 extrusion dies.

Silicon Nitride ceramics have found extensive use in non-ferrous molten metal handling, particularly aluminum and its alloys, including metal feed tubes for aluminum die casting, burner and immersion heater tubes, injector and degassing for nonferrous metals, thermocouple protection tubes, crucibles and ladles.

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Description

Sialon Extrusion diesSialon long-life extrusion dies provide performance cost advantages to the non-ferrous foundry industry.

Sialon data sheet

Material data sheet Sialon (Si3Al3O3N5)
Typical Sialon grades NVD-001 NVD-002 NVD-003 NVD-004
Bulk Density g/cm3 3.2 3.1 3.3 3.2
Water Absorption 0 0 0 0
Flexural Strength MPa 580 900 1,020 790
Vickers Hardness HV1 GPa 13.9 12.7 15.0 13.8
Fracture Toughness (SEPB) MPam1/2 4 ~ 5 6 ~ 7 7 6 ~ 7
Young’s Modulus of Elasticity GPa 290 270 300 290
Poisson’s Ratio 0.28 0.28 0.28 0.28
Coefficient of Linear Thermal (40 – 800 °C)

Expansion

×10-6/℃ 3.2 3.4 3.3 3.5
Thermal Conductivity (20℃) W/(m・k) 25 23 27 54
Specific Heat J/(g・k) 0.64 0.66 0.65 0.66
Heat Shock Resistance 550 800 800 900
Volume Resistivity (20℃) Ω・cm >1014 >1014 >1014 >1014

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