Inconel 718, a high-strength, heat-resistant nickel alloy, presents a unique challenge due to its hardness, toughness, and tendency to work-harden during machining. To achieve optimal results, you need to use specialized drills designed for high-temperature alloys. Below are the best drills and tips for drilling Inconel 718:
Best Drills for Inconel 718:
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: Inconel 718 because they maintain their hardness even at high temperatures. They are highly wear-resistant and provide excellent performance in tough, heat-resistant alloys.
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: are another good choice for drilling Inconel 718, as they have high heat resistance and are tougher than regular high-speed steel (HSS) drills.
M35M42 grades, provide a good balance of strength, heat resistance, and toughness. However, they are not as wear-resistant as carbide.
: Cobalt drills are suitable for medium-precision applications and can handle the heat generated while drilling.
High-Speed Steel (HSS) Drills with Coatings:
: are less durable for Inconel 718 compared to carbide or cobalt, but they can be used if coated appropriately.
Drilling Tips for Inconel 718:
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for Inconel 718, typically in the range of 20-30 SFM (Surface Feet per Minute). Inconel 718 is prone to work hardening, so high speeds can lead to rapid tool wear.
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high-pressure
high-pressure lubrication
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(118 degree or 135 degree ) and a
split-point drills
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: Known for their high-performance carbide drills for tough materials like Inconel 718.
: Offers carbide drills designed specifically for heat-resistant alloys.
: Provides advanced drills with coatings and geometries for high-performance drilling in difficult materials like Inconel.
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best drill for Inconel 718) for high wear resistance and heat management. Cobalt drills can be a good option for less critical applications, while HSS drills with coatings are a cost-effective alternative for certain operations. Always ensure the correct cutting parameters and use high-quality coolant to extend tool life and achieve optimal results.
