Common Coatings for Cutting Tools

2025-09-26

Coating Name	Appearance	Key Features	Typical Applications
TiN (Titanium Nitride)	Gold	General-purpose, high hardness, low friction, cost-effective	Steel, cast iron, stainless steel (general cutting)
TiCN (Titanium Carbonitride)	Gray / Blue-gray	Higher hardness than TiN, excellent wear resistance	Alloy steel, stainless steel, cast iron, hard materials
TiAlN (Titanium Aluminum Nitride)	Dark gray / Black-violet	High hot hardness, excellent heat resistance, suitable for high-speed cutting	Tool steel, alloy steel, stainless steel, dry machining
AlTiN (Aluminum Titanium Nitride)	Black-gray	Superior heat resistance and oxidation stability, longer tool life	High-speed machining, hardened steel, dry cutting
TiSiN (Titanium Silicon Nitride)	Black-gray / Blue-black	Extremely high hardness, outstanding high-temperature oxidation resistance	Hardened steel, die steel, high-hardness materials
AlTiSiN (Aluminum Titanium Silicon Nitride)	Blue-black	Exceptional heat resistance and wear resistance	Aerospace alloys, hard cutting applications
DLC (Diamond-Like Carbon)	Black / Dark gray	Ultra-low friction coefficient, anti-adhesion	Aluminum alloys, copper, non-ferrous metals, high-speed machining
CVD Diamond Coating	Silver-gray / Light gray	Super hardness, extreme wear resistance	Si-Al alloys, composites, graphite, highly abrasive materials

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