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Tungsten Carbide Powder
Tungsten carbide powder (chemical formula WC) is the primary raw material for cemented carbide production. Tungsten carbide powder is a black six square crystal with a metallic luster. Its hardness is similar to diamond, a good conductor of electricity and heat. The melting point is 2870 C, the boiling point is at a temperature of 6000C, and the relative density is about 15.63 (18 DEG C). Tungsten carbide is insoluble in water, hydrochloric acid, and sulfuric acid, soluble in mixed acid of nitric acid and hydrofluoric acid. The pure tungsten carbide is fragile, but the brittleness is reduced if mixed with a small amount of titanium, cobalt, and other metals. Processing as the tungsten carbide cutting tool, titanium carbide, tantalum carbide is often added to improve the anti-explosion capacity.
Tungsten Carbide Powder Applications
Tungsten carbide’s most outstanding property is its hardness. It is primarily used to produce a wide variety of industrial tools and wear parts that are subject to a great deal of stress. Many high-performance processes, such as metal drilling, turning, and milling, are only possible with the industrial application of tungsten carbide in carbide tools.
General WC Powder
Characteristics: Stable quality and can meet the production of most cemented carbide
Specifications:
| Classification of the Particle Size | Grade | Particle Size(um) | Total C, % | Free C, % | Combined C, % | O, % |
| Fine | FW10 | 1.00-1.50 | 6.13±0.05 | ≤0.06 | ≥6.08 | ≤0.12 |
| FW15 | 1.50-2.00 | 6.13±0.05 | ≤0.06 | ≥6.08 | ≤0.10 | |
| FW20 | 2.00-2.50 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.08 | |
| Medium | FW25 | 2.50-3.00 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.06 |
| FW30 | 3.00-4.00 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.05 | |
| FW40 | 4.00-5.00 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.05 | |
| FW50 | 5.00-6.00 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.04 | |
| FW60 | 6.00-8.00 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.04 | |
| Coarse | FW80 | 8.00-10.00 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.04 |
| FW100 | 10.00-15.00 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.04 | |
| Extra Coarse | FW150 | 15.00-20.00 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.04 |
| FW200 | 20.00-25.00 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.04 |
Superfine WC Powder
Characteristics: Concentrated particle size distribution, good dispersion, low alloy sintering temperature sensitivity, low oxygen content, and stable product quality
Specifications:
| Classification of the Particle Size | Grade | BET(m2/g) Particle Size(um) |
Total C, % | Free C, % | Combined C, % | O, % |
| Superfine | FWC02 | BET: ≥2.5 | 6.20±0.05 | ≤0.15 | ≥6.08 | ≤0.5 |
| FWC04 | BET: 1.9-2.5 | 6.20±0.05 | ≤0.12 | ≥6.08 | ≤0.35 | |
| FWC06 | 0.60-0.80 | 6.13±0.05 | ≤0.10 | ≥6.08 | ≤0.25 |
Super Coarse WC Powder
Characteristics: Grains are well developed and have a good grain appearance.
Specifications:
| Classification of the Particle Size | Grade | Particle Size(um) | Total C, % | Free C, % | Combined C, % | O, % |
| Super Coarse | FWC250 | 25.00-30.00 | 6.20±0.05 | ≤0.05 | ≥6.08 | ≤0.03 |
| FWC300 | 30.00-40.00 | 6.20±0.05 | ≤0.05 | ≥6.08 | ≤0.03 | |
| FWC400 | 40.00-60.00 | 6.13±0.05 | ≤0.05 | ≥6.08 | ≤0.03 |
Super Fine WC Powder
Characteristics: Concentrated particle size distribution, good dispersion, low alloy sintering temperature sensitivity, low oxygen content, and stable product quality
Specifications:
| Classification of the Particle Size | Grade | Particle Size(um) | Total C, % | Free C, % | Combined C, % | O, % |
| Super fine | FWC08 | 0.80-1.00 | 6.13±0.05 | ≤0.06 | ≥6.08 | ≤0.15 |
Chemical Composition of Tungsten Carbide Powder
| Impurities | Al | As | Ca | Co | Cr | Fe | Mg |
| Content (<%) | >0.001 | >0.001 | >0.0015 | >0.001 | >0.002 | >0.02 | >0.002 |
| Impurities | >Mn | >Mo | >Na | >Ni | >Pb | >Si | >Sn |
| Content (<%) | >0.002 | >0.003 | >0.0015 | >0.002 | >00005 | >0.0015 | >0.0005 |
Cast Tungsten Carbide Powder
Cast tungsten carbide powder is a eutectic mixture of both tungsten carbides, W2C and WC, which has an exceptionally high degree of hardness and wear resistance. For this reason, it is primarily used in advanced wear protection and tooling technology.
Physical Properties of Cast Tungsten Carbide Powder
| Hardness | Micro-Hardness | Density | Melting point |
| HRA | kg/m㎡ | g/cm³ | ℃ |
| 93~93.7 | 2500~3000 | 16.5 | 2525 |
Grade Properties of Cast Tungsten Carbide Powder
| Grade | W | Total C | Impurity Content %max | ||||||
| % | % | Free C | Fe | Cr | V | Cl | Ti+Ta+Nb | Co+Ni+Mo | |
| CWC-1 | 95-96 | 3.9±0.1 | 0.08 | 0.3 | 0.1 | 0.05 | 0.1 | 0.2 | 0.2 |
| CWC-2 | 95-96 | 3.9±0.1 | 0.1 | 0.5 | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 |
Type and Size of Cast Tungsten Carbide Powder
| Type | CWC5-10 | CWC10-20 | CWC20-30 | CWC30-40 | CWC40-60 | CWC60-80 | CWC80-200 | CWC200-400 | CWC-400 |
| Mesh Size | 5~10 | 10~20 | 20~30 | 30~40 | 40~60 | 60~80 | 80~200 | 200~400 | -400 |
| Millimeter Size | 4000~2000 | 2000~850 | 850~600 | 600~425 | 425~250 | 250~180 | 180~75 | 75~38 | 38 |
Customized mesh sizes are available.
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