How to choose the tool material for CNC machining of titanium?
CNC machining of titanium alloys should start from two aspects: reducing cutting temperature and reducing adhesion. Select tool materials with high thermal hardness, high bending strength, good thermal conductivity, and poor affinity with titanium alloys. YG cemented carbide is more suitable. Due to the poor heat resistance of high-speed steel, tools made of cemented carbide should be used as much as possible. Commonly used cemented carbide tool materials include YG8, YG3, YG6X, YG6A, 813, 643, YS2T and YD15.
Coated blades and YT-type cemented carbide will have a violent affinity with titanium alloys, aggravating the bonding wear of the tool, and are not suitable for cutting titanium alloys; For complex and multi-edged tools, you can choose high-vanadium high-speed steel (such as W12Cr4V4Mo), high-cobalt high-speed steel (such as W2Mo9Cr4VCo8) or aluminum high-speed steel (such as W6Mo5Cr4V2Al, M10Mo4Cr4V3Al) and other tool materials. It is suitable for making drills, reamers, end mills, broaches, taps and other tools for cutting titanium alloys.
Using diamond and cubic boron nitride as tools for cutting titanium alloys can achieve significant results. If natural diamond tools are used under the condition of emulsion cooling, the cutting speed can reach 200 m/min; If cutting fluid is not used, the allowable cutting speed is only 100m/min at the same amount of wear.