Green silicon carbide 120# for sandblasting the cutting edge of alloy cutting tools
Green Silicon Carbide 120# is a high-performance abrasive specifically engineered for sandblasting the cutting edges of alloy cutting tools. Produced from high-purity petroleum coke and quartz sand through electric arc furnace smelting at temperatures exceeding 2200°C, followed by precision crushing and rigorous screening processes, this product exhibits a distinctive green color with a silicon carbide (SiC) content of 98% or higher. It combines exceptional hardness, sharp angular morphology, excellent toughness, and tight particle size distribution, making it the ideal blasting media for processing carbide tools, high-speed steel cutters, CNC inserts, and other precision cutting tools.
Product Specifications
| Parameter | Specification |
|---|---|
| Grit Size | 120# |
| SiC Content | ≥99.0% |
| Fe₂O₃ Content | ≤0.2% |
| Bulk Density | 1.45-1.55 g/cm³ |
| Particle Shape | Angular, sharp-edged |
| Color | Green |
Key Performance Advantages
1. Superior Hardness for Efficient Cutting
Green silicon carbide ranks 9.2-9.5 on the Mohs hardness scale, second only to diamond and significantly harder than brown fused alumina. This exceptional hardness enables rapid cutting of tool surfaces, effectively removing burrs, oxide layers, and machining marks with high efficiency. For carbide tools (typically HRA 86-93), green silicon carbide represents the optimal blasting abrasive choice, delivering consistent results with minimal processing time.
2. Sharp Angular Morphology for Controlled Surface Roughness
The irregular, multi-faceted angular shape of our 120# grit creates sharp cutting edges that effectively impact tool surfaces during high-velocity blasting. This action generates a uniform micro-roughness profile that significantly enhances the adhesion strength of subsequent coatings such as TiN, TiAlN, AlCrN, and other PVD/CVD layers. The resulting mechanical interlocking between coating and substrate substantially extends tool life, with field data indicating 30-50% longer service life for coated tools that have undergone proper surface preparation.
3. Tight Particle Size Distribution for Consistent Results
Through precision screening technology, our 120# product maintains a narrow particle size distribution with strict control over both coarse and fine fractions. This ensures uniform impact energy across the entire tool surface during blasting, eliminating localized over-blasting or under-blasting issues. The result is repeatable, batch-to-batch consistency—a critical requirement for high-volume tool manufacturing operations.
4. High Purity with Minimal Contamination Risk
With SiC content exceeding 98% and Fe₂O₃ impurities strictly limited to ≤0.2%, our green silicon carbide poses no risk of metallic contamination to the tool surface. This is particularly vital for vacuum coating processes, where even trace contaminants can compromise coating adhesion and performance.
5. Optimal Toughness for Extended Media Life
Our 120# grit exhibits balanced toughness, resisting premature fracture during high-velocity impact while maintaining cutting effectiveness. This allows for 3-5 reuses of the blasting media before replacement, significantly reducing abrasive consumption and operational costs.
Applications
| Application | Description |
|---|---|
| Carbide Tools | CNC inserts, end mills, drills, reamers |
| High-Speed Steel Tools | Taps, hobs, gear cutters, broaches |
| Coated Tools | Pre-coating surface activation for enhanced adhesion |
| Tool Reconditioning | Secondary processing of reground tools |
| Precision Components | Medical instruments, aerospace fasteners |
Recommended Blasting Parameters
| Parameter | Recommended Range |
|---|---|
| Air Pressure | 0.4-0.7 MPa (adjust based on tool hardness) |
| Nozzle Angle | 45°-75° for optimal coverage |
| Standoff Distance | 100-200 mm |
| Media Consumption | 0.5-1.5 kg per batch (varies by part size) |
| Reuse Cycles | 3-5 times with fresh media replenishment |
Packaging and Storage
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Packaging: 25 kg bags, woven outer layer with moisture-proof inner lining
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Storage: Keep sealed in dry, cool conditions; avoid moisture absorption
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Shelf Life: 24 months under proper storage conditions
Our 120# green silicon carbide has been validated by leading cutting tool manufacturers worldwide. Contact us for samples and technical support to optimize your sandblasting process.
