Recently, tool makers have begun working with academic institutions to modify cutting tool testing procedures to consider the thermal properties of certain materials.
The new guidelines reflect the creation of new reference materials. Traditionally, the machinability standard is determined based on a reference material, a alloy steel, and the mechanical load produced during the process. At present, there is a single reference material for austenitic stainless steel, and its speed, feeding and depth baseline values have been determined. Relative to the reference material, the balance or calibration factor was applied to determine the change in the base value of the optimal productivity in the materials with different processing properties.
Specific geometry of a particular material
Many cutting tools can provide good performance under various cutting conditions and processing parameters. These tools can be a cost-effective option for a one-time job with intermediate productivity and quality requirements. However, in order to achieve maximum performance, tool manufacturers constantly manipulate elements, and balance a variety of tools can create in a given work piece materials to provide the highest productivity and process reliability of cutting tools.
The basic elements of a tool include its matrix, coating and geometry. Each of them is important, and in the best tools, as a system, the results are beyond the sum of the individual parts.
There is a difference between the roles of this tool. Substrate and coating have passive effect; They are designed to balance hardness and toughness to withstand high temperatures, resistance to chemicals, adhesions and abrasive wear. On the other hand, the cutting tool geometry plays a positive role, because change geometry can change the number of metals, can be removed during a certain period of time, the heat generated by the, the shape of the chip and surface finish.