Niobium has low strength, low hardness and high toughness, with good cold plasticity. In the cutting process, with the increase of temperature, oxygen and nitrogen are absorbed, which has a significant effect on the properties of niobium. Baoji Zhongpu provides: tantalum board, tantalum rod, tantalum tube; Therefore, the main problem of cutting niobium is to prevent cutting temperature is too high, requiring the use of sharp tools, low cutting speed, and pouring a lot of cutting fluid.

Cutting niobium cutting tool materials can be used high speed steel or YG8, YW2 and other hard alloy, but it is not suitable to use hard alloy containing niobium as tool material. When using carbide tools, the geometric parameters of the tools can be selected as follows: γO=20o ~ 25o,αO=10o ~ 15o, KP R = 45O, KP R = 15O,γO1= -5O ~ 0O, B γ=0.1 ~ 0.3mm, R ε=0.2 ~ 0.5mm. Radius of chipping trough =4 ~ 6mm. The leading Angle and main deflection Angle should be appropriately increased while finishing, and the radius of tool tip arc should be reduced. Baoji Zhongpu provides: tantalum board, tantalum rod, tantalum tube; Niobium plate, niobium rod, niobium tube cutting amount of choice as follows: rough processing when ν C =45 ~ 80m/min, AP =5 ~ 8mm, F =0.3 ~ 0.5mm /r; Semi-finishing when ν C =60 ~ 100m/min, AP ≤2mm, f=0.2 ~ 0.4mm/r; When finishing, ν C =70 ~ 120m/min, AP =0.1 ~ 0.5mm, F =0.1 ~ 0.15mm /r. Using high-speed steel tool, ν C ≤30m/min, F ≤0.3mm/r.

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