Tungsten Carbide Buttons for Rock Drill Bits
Key Advantages
✅ Ultra-High Hardness: Second only to diamond, resisting wear from abrasive rock and debris.
✅ Impact Toughness: Cobalt-bonded matrix (6–15% Co) absorbs shock loads in percussive drilling.
✅ Heat Resistance: Stable performance at temperatures up to 800°C during high-speed drilling.
✅ Custom Geometry: Optimized dome angles (90°–130°) for balanced penetration and wear life.
Standard Specifications & Sizes
Material Grades
| Grade | Composition (WC-Co) | Hardness (HRA) | Best For |
|---|---|---|---|
| YG6 | 94% WC + 6% Co | 90–91 | Soft to medium-hard rock |
| YG8 | 92% WC + 8% Co | 89–90 | Medium-hard rock (granite) |
| YG10 | 90% WC + 10% Co | 88–89 | Hard & abrasive formations |
| YG15 | 85% WC + 15% Co | 86–87 | Extreme冲击 & fractured rock |
Common Dimensions
| Diameter (mm) | Height (mm) | Dome Angle | Tolerance |
|---|---|---|---|
| 8–12 | 8–15 | 90°–110° | ±0.05mm |
| 13–18 | 16–25 | 110°–130° | ±0.1mm |
| 19–25 | 26–35 | 120°–130° (flat-top) | ±0.15mm |
Custom Options:
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Micro buttons (5–7mm) for compact drill bits
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Stepped or multi-diameter designs
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Anti-spalling grooves for crack-prone rock
Applications
1. Mining & Quarrying
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Blast Hole Drilling: YG8/YG10 buttons for rotary-percussive drills in iron ore and copper mines.
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Tunnel Boring: YG15 buttons for high-impact tunnel boring machines (TBMs).
2. Oil & Gas Drilling
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Downhole Hammers: Buttons with 110° dome angles for directional drilling in shale.
3. Construction & Demolition
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DTH Hammers: Flat-top buttons (19–25mm) for precision rock splitting.
Technical Performance Data
| Property | Value |
|---|---|
| Density | 14.8–15.1 g/cm³ |
| Transverse Rupture Strength | ≥2200 MPa |
| Thermal Conductivity | 80–100 W/m·K |
| Working Lifetime | 2–3x longer than sintered steel buttons |
Why Choose Our Carbide Buttons?
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HIP Technology: Hot isostatic pressing ensures 100% density and zero porosity.
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Precision Grinding: CNC-machined to ±0.05mm tolerance for uniform load distribution.
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Global Certifications: ISO 9001, API Spec 7-1, and MSHA compliance.
FAQ: Tungsten Carbide Buttons
Q1: How to replace worn buttons on a drill bit?
✅ Use induction brazing at 950–1050°C with silver-based filler (we provide technical guidelines).
Q2: Can buttons be reconditioned?
✅ Yes! Grind worn surfaces and apply wear-resistant coatings (TiCN/AlCrN recommended).
Q3: What’s the optimal button spacing for granite drilling?
✅ 12–15mm between buttons to balance rock fragmentation and bit life.
Q4: MOQ for custom sizes?
✅ MOQ 5 KG.
