Performance of austempered ductile iron (ADI) grinding using diluted oil in MQL combined with wheel cleaning jet and different CBN grains friability

The large amount of heat generated during grinding is minimized using cutting fluid. However, they cause damage to human health and the environment and increase the cost of the process. Thus, reducing or replacing the use of cutting fluid by means of technique application as minimal quantity lubrication (MQL) simultaneously to wheel cleaning jet (WCJ) can dramatically reduce the socio-environmental impact of the process. Thus, this work analyzed the application of flood method, Pure MQL + WCJ, and diluted MQL + WCJ in the external grinding of austempered ductile iron, which is a material few approached in the literature on grinding. Besides, two wheel types of different friability were used in order to evaluate its influence on the grinding performance. The surface roughness, roundness deviation, diametral wheel wear, grinding power, acoustic emission, specific energy, and microhardness were analyzed. As results, the tests showed that the less friable wheel produced a better surface finish, and the diluted MQL + WCJ produced results significantly close to the flood method.