Tungsten carbide cutting tools are now in common use in industry. The differences in tool performance between cryogenically treated and untreated tungsten carbide tool inserts during the high-speed milling of medium carbon steel were analyzed. It has been found that cryogenically treated tools exhibit better tool wear resistance than untreated ones.It is also evident that the application of coolant during cutting helps to reduce tool wear experienced by the cryogenically treated tools even further very few papers have been published about the beneļ¬cial uses of a deep cryogenic treatment at 77 K on the properties of high speed steel.Thermal and cryogenic conditions were concurrently followed by down-thermal shock (pos- itive to negative temperature excursion) and up-thermal shock (negative to positive temperature excursion) treatments respectively on the composite laminates.
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