The melting point of tantalum is 2980 ℃, second only to tungsten (3380 ℃) among commonly used refractory metals, with a density of 16.67 g/cm3. Under annealed conditions, tantalum has good plasticity and is relatively stable at high temperatures, capable of absorbing and retaining gases. Tantalum is acid resistant and a biocompatible material. Tantalum has a wide range of applications in industries such as electronics, chemicals, and healthcare. Meanwhile, tantalum is also an indispensable material for making hard alloys.

Tantalum has a high melting point, high density, good plasticity in annealed state, and stable performance at high temperatures. The annealed tantalum material is soft and tough, but severe adhesion occurs during cutting, causing adhesive wear of the cutting tool. Especially when the cutting speed is below 20m/min, sticking and tearing phenomena are more severe. When the cutting speed is higher than 40m/min, the tearing phenomenon is greatly reduced. When cutting, the cutting tool should be as sharp as possible and the cutting speed should not be too low. Generally, hard alloy is used as the cutting tool material, and commonly used ones include YG8, YW2, etc. Using a larger rake angle and lead angle, the geometric parameters of the tool are: γ O=35o~45o, αO=5o～8o，Κr=90o,Κ′r=5o,γO1=-2o～2o,bγ=0.1～0.3mm，rε=0.2～0.5mm， Front and rear surface roughness Ra<; 0.16-0.32 μ m to reduce friction and knife sticking.

The selection of cutting parameters is as follows: during rough turning, v c=30-70m/min, ap=5～8mm，f=0.2～0.4mm/r； During precision and semi precision machining, the speed of ν c=50-80m/min, ap≤1.5mm，f=0.1～0.3mm/r。 Cutting fluid with both cooling and lubrication effects should be used during cutting, and the flow rate should be sufficient.