The toolmaker will make hard alloy substrate to provide sufficient thermal hardness to withstand the high temperature produced by processing stainless steel. At the same time, the importance of substrate composition is at least equal to the sharpness of the tool’s cutting edge. Sharper stainless steel cutting tools can cut down on stainless steel, not deform it, thereby reducing heat generation.
Active cutting parameters
To remove heat from the cutting area, the most effective method is to use the maximum cutting depth and feeding rate. The goal is to maximize the heat in the chip. Due to the thermal conductivity of stainless steel is not high, so per cubic millimeter wafer materials can absorb quantity of heat is limited, therefore produce bigger, bigger and bigger chips, will take more heat. Using a larger cutting depth will reduce the cutting number needed to complete the parts, it is an important consideration, because austenitic stainless steel has a tendency to strain or when machining work hardening.
These radical processing strategies have practical limitations. For example, the surface smoothness requirement would limit the maximum feed rate. The power of the machine stainless steel cutting tool, as well as the strength of the tool and workpiece, also limits the erosion of the parameters that can be used.
The coolant strategy
The thermal performance of austenitic stainless steel alloy shows that the application of coolant is almost the key to success in the process of processing. The coolant must be of high quality, containing at least 8% or 9% of the oil content in the oil/water emulsion, compared with 3% or 4% in many machining operations.