Tungsten Carbide
Cast Tungsten Carbide (Relit) – granular and spherical powder for facing.
Cast tungsten carbide is designed for wear resistant surfacing of parts operating under conditions of intense wear. It is used for the surfacing of drill bits, blast furnaces, mining tools, orthopaedic surgical instruments and dental burs.
The powder is available in granular or spherical forms.
Chemical Composition
| Wolfram Carbon associated Carbon-free Iron |
95.8 – 96.4% 3.6 – 4.0% less than 0.05% less than 0.15% |
| Granular tungsten carbide (CTC-G) | Spherical tungsten carbide (CTC-S) | |
 |
 |
| Particle sizes (mm) | Granular (CTC-G) | Spherical (CTC-S) | ||
| ≤0.04 0.04-0.10 0.10- 0.16 0.16-0.28 0.28-0.40 0.40-0.63 0.63-1.00 1.00-1.60 1.60-2.50 |
CTC-G-04 CTC-G-1 CTC-G-2 CTC-G-3 CTC-G-4 CTC-G-6 CTC-G-10 CTC-G-16 CTC-G-25 |
CTC-S-04 CTC-S-1 CTC-S-2 CTC-S-3 CTC-S-4 CTC-S-6 CTC-S-10 CTC-S-16 CTC-S-25 |
Coefficient for equiaxed cast tungsten carbide granular not more than 1.45
The micro-hardness of cast tungsten carbide alloy should be within 2100 – 2800 kg/mm² (20580 – 27440 Mn/m²).
Cast tungsten carbide is packed in hermetically sealed custom polythene jars with a sheet steel cover.
Induction surfacing with a mixture of borate flux and grains of the alloy is recommended.
Recommended temperature of deposition: 1500-1540°C
Induction cladding:
Anode voltage: 116
Total anode current: 6.5A
Total grid current: 0.7A
Heating time – up to full flux fusion