The reasons why titanium is difficult to machine and the problems encountered during machining
2024-09-18
Why is titanium difficult to machine?
1. Shorter blade contact length
Under the action of oxygen and nitrogen in the air, the chips of titanium alloy will form a hardening effect, which makes the chips appear short and small. Therefore, the knife edge is not very long when cutting, the cutting force and cutting heat is concentrated in the vicinity of our cutting edge, the tool is prone to the phenomenon of chipping, which is often referred to as the phenomenon of hitting the knife
2. Thermal conductivity of titanium alloy
Generally speaking, the thermal conductivity of titanium alloy is small, is 1/6 - 1/7 of No.45 steel, and the density is small, the cutting heat is concentrated in the vicinity of the cutting edge, the cutting temperature is high, and the tool will be violently worn out.
3. Greater chemical affinity
In general, the chemical affinity of titanium alloy is higher, and it is easy to bond severely with titanium-containing cemented carbide.
4. Smaller modulus of elasticity
The modulus of elasticity of titanium alloy is about 1/2 of the modulus of elasticity of 45 steel, so the elastic recovery is larger, which makes the machining workpiece wear seriously, and also prone to deformation of
clamping.
5. Titanium material is flammable
At a high temperature of 600 degrees Celsius, titanium chips are easy to burn, some fine titanium alloy chips, at a temperature of about 200 degrees Celsius will burn. Some large-scale enterprises processing titanium alloy are using liquid nitrogen for processing cooling.
6. Cold hard phenomenon is serious
Titanium's chemical activity is large, high temperature cutting is easy to absorb the oxygen and nitrogen in the air, thus forming a more brittle skin. In the cutting process, plastic deformation also caused by the hardening of the metal surface. The cold hardening phenomenon not only reduces the fatigue strength of the part, but also increases tool wear. These reasons make titanium alloys one of the most difficult materials to
machine in the machining industry. If you encounter problems when machining titanium materials, welcome to find us in Google search engine AATI YATAIXIN,
we will continue to provide you with the best quality products and services!
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