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How to improve the machining performance of titanium alloys

Improving the machining performance of titanium alloys can be achieved through a variety of methods and technical means. Here are some effective strategies:

Tool selection and design
• High cobalt tool materials: Using tools with high cobalt content can enhance the secondary hardening effect, improve the red hardness and wear resistance of the tool, and thus extend the tool life.
• Tool geometry optimization:
• Rake angle: Selecting a smaller rake angle (0° to 5°) can increase the contact area between the chip and the front cutting face, which helps to disperse cutting heat and reduce tool wear.
• Back angle: Moderately increase the back angle (5° to 10°) to reduce friction between the tool and the workpiece and reduce wear rate.
• Helix angle: Select a smaller helix angle to facilitate chip evacuation and heat dissipation, and reduce cutting resistance.

Cutting parameter optimization
• Cutting speed: It is recommended to use a lower cutting speed (30~50 m/min) to avoid excessive cutting heat accumulation and tool wear.
• Feed rate and cutting depth:
• Use a larger feed rate for roughing and a moderate feed rate for finishing.
• Cutting depth should be controlled within an appropriate range (e.g., 1/3 tool diameter) to avoid tool sticking and burning.

Cooling and lubrication
• High-pressure cooling system: Using high-pressure coolant (up to 60~150 MPa) can significantly reduce cutting temperature, reduce cutting force, and improve chip morphology.
• Coolant selection: Avoid using coolants containing chlorine to prevent the generation of toxic substances and hydrogen embrittlement. It is recommended to use water-soluble emulsions or synthetic coolants to ensure sufficient coolant flow and pressure.

Surface treatment and finishing
• Finishing: After completing mechanical processing, manual butterfly finishing and other methods can be used to remove surface defects, thereby improving the working life and surface quality of parts.

Processing procedures
• Formulating scientific and reasonable processing procedures, including reasonable arrangement of processing sequence, selection of appropriate positioning tooling, etc., can effectively improve the processing efficiency and finished product quality of titanium alloys.


By comprehensively applying the above strategies, the machining performance of titanium alloys can be significantly improved, production costs can be reduced, and product quality can be improved.