Matters needing attention in CNC machining of titanium precision machining parts

Because titanium alloy has low density, high strength, high specific strength, good corrosion resistance, good low temperature performance, good process performance, etc., it is used in aerospace, navigation, petroleum development, medical equipment, metallurgy, electric power and other fields. When CNC Machining Titanium alloy, the cutting ability is relatively weak, hard tools and long processing time are required, and the material price is high, so the machining cost of Titanium Precision Machining parts is higher than that of other alloy materials of aluminum alloy.

In the titanium parts CNC Machining process, the following issues should be paid attention to:

1):Due to the small modulus of elasticity of titanium alloy, the clamping deformation and force deformation of the workpiece during processing will reduce the processing accuracy of the workpiece; the clamping force should not be too large when the workpiece is installed, and auxiliary support can be added if necessary.

2):If a cutting fluid containing hydrogen is used, it will decompose and release hydrogen at high temperatures during the cutting process, which will be absorbed by titanium and cause hydrogen embrittlement; it may also cause high-temperature stress corrosion cracking of titanium alloys.

3):The chloride in the cutting fluid may also decompose or volatilize toxic gas during use. Safety protection measures should be taken when using it, otherwise it should not be used; after cutting, the parts should be thoroughly cleaned with a chlorine-free cleaning agent in time to remove chlorine residues.

4):It is forbidden to use lead or zinc-based alloys to make tools and fixtures in contact with titanium alloys. Copper, tin, cadmium and their alloys are also forbidden to use.

5)All the tools, fixtures or other devices in contact with the titanium alloy must be clean; the cleaned titanium alloy parts must be prevented from being contaminated by grease or fingerprints, otherwise it may cause salt (sodium chloride) stress corrosion in the future.

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