Cutting HRC63-grade 100Cr6 hardened steel—used in high-precision components like bearings and gears—has long been an industry challenge: traditional saw blades suffer from tooth chipping, short service life, and rough cuts. Golden Egret’s GU25U with TiAlN coated Tungsten Carbide Circular Saw Blades leverages dual-core technology—ultra-fine grain substrate + nano-coating—delivering a significant breakthrough in efficiency and lifespan for hardened state cutting!
Part 1: Four Major Challenges in Hard Material Cutting and Their Breakthrough Solutions
| Pain points | Performance of traditional saw blades | Solutions for Jinlu tungsten steel circular saw blades |
| Broken blades | Defective tooth tip after 30 cuts | Ultra-fine-grained GU25U substrate bending strength ↑40% |
| Rapid wear | Precision out of control after 50 cuts | TiAlN coating hardness reaches 3800 HV, life extended by 3 times |
| Burning and deformation of cut surface | Many burrs, requiring secondary grinding | Thermal conductivity + 900℃ resistant coating, cut surface Ra≤3.2μm |
| Chip adhesion and jamming | Frequent shutdowns for chip cleaning | Low friction coating, supports dry cutting without sticky slag |
Part 2: Why choose tungsten steel circular saw blade to cut 100Cr6 hardened steel?
2.1. Material performance is better than ordinary high-speed steel
Hardness: Tungsten steel (hard alloy) has a hardness of 90-94 HRA (≈83-86 HRC), which can resist the wear of 63 HRC workpieces.
Red hardness advantage: It still maintains high hardness at 800℃, eliminating thermal softening failure during high-speed cutting
2.2. Triple technical barriers of Jinlu GU25U+TiAlN coating
Part 3:Actual data: Excellent performance of GU25U saw blade in cutting HRC63 100Cr6
| index | Traditional uncoated saw blade | Golden Heron GU25U+TiAlN | Improvement |
| Number of cuts per grinding operation | 30-50 times | 120-150 times | ↑300% |
| Cutting speed | 30 m/min | 70 m/min | ↑133% |
| Surface roughness Ra | 6.3 μm | 3.2 μm | ↓49% |
| Processing cost per piece | $0.17/件 | ￥0.05/件 | ↓67% |
Test conditions: 160mm diameter saw blade, cutting 20mm thick 100Cr6 bar, cooling method: minimal quantity lubrication (MQL)
Part 4: The key to successful hard cutting: parameter optimization guide
4.1. Golden parameters for tungsten steel circular saw blade operation
Linear speed: 60-80 m/min (too low is easy to break the tooth, too high causes overheating).
Feed rate: 0.03-0.06 mm/tooth (hard cutting requires “light cutting”).
Cooling solution: oil mist cooling or nanoparticle spray is preferred.
4.2. Pitfall avoidance guide
✘ It is strictly forbidden to use water-based cutting fluid (thermal shock causes micro cracks).
✘ Avoid feed pauses (local overheating and burning of coating).
✔ Check the wear of the tooth tip every 50 cuts (timely grinding to ensure accuracy).
Part 5: Industry application scenarios
5.1 Cutting of hardened rings of automobile bearings
→ Use φ250mm GU25U saw blade to achieve ±0.1mm accuracy, replacing grinding wheel slotting
5.2 High-hardness slide rail unloading of hydraulic valve blocks
→ Continuous cutting of 50mm thick hardened steel, single-blade life of up to 200 times
5.3 Efficient separation of precision gear blanks
→ Dry cutting process avoids pollution and eliminates cleaning process
Conclusion
Hard material cutting has entered the “tungsten steel + coating” era! Jinlu GU25U+TiAlN tungsten steel circular saw blade achieves imported performance at domestic cost, becoming the ultimate weapon for cutting HRC63 grade 100Cr6 hardened steel.
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