Titanium Shaped Parts

The root cause of the difficulty in machining titanium special-shaped parts:

Titanium alloy material features:

① High strength and light weight. (Strength-to-weight ratio is very high in metal structural materials)

② High temperature resistance. (Stable performance at 400-500℃)

③ The oxides, nitrides and carbides of titanium have good corrosion resistance

④ Good affinity with living organisms

Difficult-to-machine properties of titanium alloys:

Why is titanium alloy difficult to process? Next, I will take you to uncover the essence of the difficult machining of titanium alloys.

① Low thermal conductivity.

The thermal conductivity of titanium alloy is only about 16% of that of 45# steel, and the heat cannot be conducted in time during processing, resulting in local high temperature of the cutting edge (the temperature of the tool tip during processing is more than 1 times that of 45# steel), which is easy to cause tool diffusion wear.

② Serious work hardening.

The work hardening phenomenon of titanium alloy is obvious, and the surface hardening layer is more serious than that of stainless steel, which will cause certain difficulties in subsequent processing, such as increased tool boundary damage.

Four characteristics of titanium alloys, such as low thermal conductivity, severe work hardening, high affinity with tools, and small plastic deformation, are the essential reasons for the difficulty of processing titanium alloys. Its machinability index is only 20% of that of free-cutting steel.

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