Cutting and Application of Tantalum Plate, Tantalum Foil and Tantalum Machining Parts

The melting point of tantalum is 2980 ℃, which is second only to tungsten (3380 ℃) in common refractory metals, and the density is 16.67g/cm3. In the annealed state, tantalum has good plasticity and is relatively stable at high temperatures, absorbing and retaining gases. Tantalum is resistant to acid and is a biocompatible material. Tantalum is widely used in electronic, chemical, medical and other industries. At the same time, tantalum is also an indispensable material for the production of cemented carbide.
Tantalum has high melting point, high density, good plasticity in the annealed state, and stable performance at high temperature. After annealing, the tantalum material is soft and tough, and will produce serious adhesion phenomenon during cutting, which will cause the bonding wear of the tool. Especially when the cutting speed is lower than 20 m/min, sticking and tearing are more serious. When the cutting speed is higher than 40 m/min, the tearing phenomenon is greatly reduced. The cutting tool is required to be as sharp as possible, and the cutting speed should not be too low. Cemented carbide is generally used as tool material, commonly used YG8, YW2 and so on. Using larger rake angle and main deflection angle, the geometric parameters of the tool are: γ O = 35o ~ 45o,α O = 5o ~ 8o,Κr = 90o, Κ'r = 5o,γO1 =-2o ~ 2o,bγ = 0.1~0.3mm,r ε = 0.2~0.5mm, and the surface roughness Ra<0.16~0.32 μm, to reduce friction and stick knife phenomenon.
The selection of cutting parameters is as follows: νc = 30~70 m/min,ap = 5~8mm,f = 0.2~0.4mm/r for rough turning; νc = 50~80 m/min,ap ≤ 1.5mm,f = 0.1~0.3mm/r for fine turning and semi-fine turning. Cutting fluid with both cooling and lubrication should be used, and the flow should be sufficient.