How to Regrind and Recoat Carbide Tools

Introduction

Carbide tools can be resharpened multiple times, extending their useful life significantly. Proper regrinding and recoating restore tool performance at a fraction of new tool cost.

When to Regrind

Regrind tools when the cutting edge shows wear or when surface finish deteriorates. Do not wait for catastrophic failure, as this can damage the tool body.

Regrinding Process

Use diamond grinding wheels with proper coolant. Remove only enough material to restore the edge geometry. Avoid overheating, which can damage the carbide substrate.

Recoating

After regrinding, old coating must be stripped before recoating. New PVD coatings restore the low-friction, heat-resistant properties. Recoating is cost-effective for expensive tools.

Edge Preparation

Light edge honing after regrinding strengthens the cutting edge. This prevents micro-chipping and extends tool life, especially in interrupted cuts.

Conclusion

Regrinding and recoating carbide tools dramatically reduce tooling costs. With proper techniques, tools can be resharpened many times while maintaining performance.

References

GB/T 7714: GUPTA R, SONG J. Powder metallurgy processing and mechanical properties of cemented tungsten carbide composites[J]. International Journal of Refractory Metals and Hard Materials, 2020, 91: 105246.

APA 7th: Gupta, R., & Song, J. (2020). Powder metallurgy processing and mechanical properties of cemented tungsten carbide composites.

MLA 9th: Gupta, R., and J. Song. "Powder Metallurgy Processing and Mechanical Properties of Cemented Tungsten Carbide Composites."