Cutting tools suitable materials

Routing Sawing Shearing Turning Fire hazard Lubricant or coolant Material and shape of cutting tool Quality suitability for ... 

In comparison with the use of diamond as a cutting tool material, the consumption of diamond for non-cutting applications is small. Nevertheless, high-quality-single crystal industrial diamond is often the only suitable material for specific tasks, due to its outstanding mechanieal, optical, electrical, chemical or thermal properties. 

The flank wear s tool-life curve of in dry turning of diamond tool for Al-20 mass% Si alloy is presented in Figure 11.2.12 1191. In comparison with the cemented carbide, the diamond tool shows superior cutting performance. This is due to extremely high hardness and superior thermal conductivity of diamond. The diamond is suitable material for machining such non-ferrous alloys. 

Substrates. Suitable substrates for TiC deposition are the cemented carbides, such as tungsten carbide (WC) bonded with cobalt (Co), which are widely used as cutting-tool materials (see Ch. 16). Other substrates coated by TiC are molybdenum and graphite. 1 1 In the case of molydenum, it is essential to maintain the deposition temperature below 950"C, otherwise recrystallization of the metal and reduction in mechanical strength will occur. 

Monolithic silicon nitride is now used extensively as a cutting tool material.The material is especially recommended for the high-speed machining of cast iron due to its excellent thermal stability, hardness, and wear resistance. When coated with TiN (by CVD), it is suitable for the machining of steel, since TiN provides further improvement in chemical resistance. ... 

Tbol Materials. Cutting tools used to machine titanium require abrasion resistance and adequate hot hardness. Carbide tools (such as grades C-2 and C-3), if feasible, optimize production rates. Gen-eral-pmpose high-speed tool steels (such as grades Ml, M2, M7, and MIO) are often suitable. However, best results are generally obtained with more highly alloyed grades, such as T5, T15, M33, and the M40 series. 

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