What is Cutting Fluid used for in Metallography?
- Materialographic cutting is always performed as wet grinding, using a grinding fluid orcoolant. The fluid has the following simultaneous functions: cooling the work piece/cut-off wheel interface; lubrication; flushing away the chips; protecting against corrosion of work piece and machine; and preventing development of bacteria and fungi. Because water is a very good cooling medium, it is used as the main ingredient. However, an additive that contains a number of components is needed to obtain the mentioned functions.
Why is Lubrication and Cooling important in Metallography?
- Heat is developed during the grinding operation due to chip formation and friction forces in the cut. For these reasons it is important that a relatively high lubrication takes place, reducing the power required to remove a given volume of material and thereby keeping the heat generation as low as possible, and at the same time cool the work piece to avoid a heat buildup.