1. Processing characteristics
The thermal conductivity of titanium alloy is low, only 1/4 of steel, 1/13 of aluminum, and 1/25 of copper. Due to the slow heat dissipation of the cutting zone, which is not conducive to the heat balance, in the cutting process, the heat dissipation and cooling effect is very poor, easy to form high temperature in the cutting zone, and the deformation and rebound of the parts after processing are large, resulting in the increase of cutting tool torque, fast cutting edge wear, and reduced durability. And the chemical activity of titanium alloy is high, and it is easy to react with the tool material at high temperature, forming dissolution and diffusion, resulting in the phenomenon of sticking, burning and breaking the knife.
2. Selection of cutting tools and coolant materials
The tool material selection should meet the following requirements:
(1) Sufficient hardness: the hardness of the tool must be much greater than the hardness of titanium alloy.
(2) Sufficient strength and toughness: Because the tool is subjected to a lot of torque and cutting force when cutting titanium alloy, it must have sufficient strength and toughness.
(3) sufficient wear resistance: due to the good toughness of titanium alloy, the cutting edge should be sharp during processing, so the tool material must have sufficient wear resistance, so as to reduce work hardening. This is the most important parameter for selecting titanium alloy cutting tools.
(4) The affinity between the tool material and titanium alloy should be poor: due to the high chemical activity of titanium alloy, it is necessary to avoid the formation of the tool material and titanium alloy by dissolution and diffusion, resulting in the phenomenon of sticking and burning the knife. After a variety of tool tests show that the use of high cobalt tool effect is ideal, the main role of cobalt can strengthen the secondary hardening effect, improve the red hardness and hardness after heat treatment, while having high toughness, wear resistance, good heat dissipation.
FANMETAL has many years of experience in producing various Titanium Alloy products such as Titanium 6AL-4V ELI Bar, Titanium Alloy Straight Wires and Titanium Alloy Straight Wires, if needed, Feel free to contact us by email.
