Abstract
In recent years, the application of environmentally friendly cutting fluids in the metal cutting industry has been a growing concern in all over the world. In this study, the minimum quantity cooling lubrication (MQCL) technique, which uses very small amount of cutting oil, is motivated to apply to the hard milling process of Hardox 500 steel. Further, rice bran oil, a natural biodegradable oil, is used as the base fluid of Al2O3/MoS2 hybrid nanofluid. ANOVA analysis is used to study the influences of nanoparticle concentration, cutting speed, and feed rate on surface roughness. The obtained results indicate that good surface quality is achieved and the cutting speed is significantly increased to 140 m/min (about 2.55–2.80 times higher than the recommended values) due to the better cooling and lubricating effects from MQCL system and Al2O3/MoS2 hybrid nanofluid. Moreover, the microstructure of the machined surface proves the formation of MoS2 tribo film by using Al2O3/MoS2 hybrid nanofluid, indicating that the effectiveness of each type of nanoparticle in hybrid nanofluid has been promoted. Furthermore, the important technical guides for machining Hardox 500 steel are provided.
Highlights
Milling of Hardox 500 Steel.In recent years, there has been an increasing interest in sustainable machining, green manufacturing, and environmentally friendly manufacturing, which promote the research and application of new technologies to minimize negative impacts on the environment.The field of metal cutting is not out of this trend
The study results indicated that the tool machinability improved, and the chip thickness reduced due to better cooling and lubricating performance of nanofluids
The effect of the Al2O3/MoS2 hybrid nanofluid with the base fluid of rice bran In oilthis on cutting andAl surface roughness innanofluid hard milling of the Hardox steel study, performance the effect of the hybrid with base500 fluid of was rice investigated by using analysis applied for the
Summary
Milling of Hardox 500 Steel.In recent years, there has been an increasing interest in sustainable machining, green manufacturing, and environmentally friendly manufacturing, which promote the research and application of new technologies to minimize negative impacts on the environment.The field of metal cutting is not out of this trend. There has been an increasing interest in sustainable machining, green manufacturing, and environmentally friendly manufacturing, which promote the research and application of new technologies to minimize negative impacts on the environment. In the last two decades, hard machining technology, such as hard milling, has been successfully applied, bringing out economic, technological, environmental characteristics. This technology has attracted the attention by researchers and by manufacturers all over the world. In the mold industry, it is possible to directly machine hardened steel with superior productivity compared to grinding and Electrical discharge machining (EDM) while still remaining technical requirements for dimensional accuracy and surface quality
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