Zhuzhou Carbide 18/25mm Wear Resistant Coal Mining Tungsten Carbide Buttons
Cemented carbide is a kind of composite material which is made of refractory metal hard compounds (WC, TiC, etc.) and bonding metals (CO, Ni, Fe, etc.) by powder metallurgy. Cemented carbide have high hardness, high wear resistance, high strength, high modulus of elasticity, low coefficient of thermal expansion, high red hardness and stable chemical properties.
| Classification of Grain Size of Cemented Carbide (ISO4499-2-2008) | |
| Category | Grain size of WC(μm) |
| Nano | ＜0.2 |
| Ultrafine | 0.2～0.5 |
| Submicron | 0.5～0.8 |
| Fine | 0.8～1.3 |
| Medium | 1.3～2.5 |
| Coarse | 2.5～6.0 |
| Extra coarse | ＞6.0 |
Conical buttons for medium and low pressure DTH drilling
| Conical buttons for medium and low pressure DTH drilling | ||||||
| Type | Dimension | |||||
| D | H | SR | 0° | a° | o p | |
| SZ12X18A | 12.35 | 18 | 4.8 | 55 | 20 | 28.0 |
| SZ12*18B | 12.35 | 18 | 4.0 | 55 | 20 | 27.0 |
| SZ12*18 | 12.35 | 18 | 4.5 | 53/55 | 20 | 20.0 |
| SZ13*18 | 13.35 | 18 | 4.5 | 53/55 | 20 | 20.0 |
| SZ13*19A | 13.35 | 19 | 4.5 | 55 | 20 | 28.0 |
| SZ13*19B | 13.35 | 19 | 5.0 | 55 | 20 | 27.0 |
| SZ14*19 | 14.35 | 19 | 5.0 | 53/55 | 20 | 20.0 |
| SZ14*22A | 14.35 | 22 | 5.0 | 55 | 20 | 14.5 |
| Spherical buttons for shield machine hob | |||||
| Type | Dimension | ||||
| D | H | SR | a° | P° | |
| ZQ16*23KP | 16.25 | 23 | 9 | 18 | 1.8 |
| ZQ16*21KP | 16.25 | 21 | 9 | 18 | 1.8 |
Applications:
Polyconical, Parabolic and Mushroom Tungsten carbide buttons, are the general buttons shapes for coal mining series.
Suitable for welding coal mining, coal mining machine in mid-soft rock formation, tunnel excavation in hard rock formation, drilling on extra hard rock formation or tunnel excavation in complicated rock formation.
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