This study is intended to fill up the deficiency of the high-speed cutting (HSC) machining mechanism for TC17 Ti alloy. In this study, as the study object, TC17 Ti alloy is placed in room temperature (20 °C), ultra-low temperature (− 60 °C), and ultra-high temperature (350 °C) for HSC experiment, respectively, both through single-medium minimum quantity lubrication (SMMQL) and oil-water minimum quantity lubrication (OWMQL). The experimental results show that the main cutting force decreases by 33% during oil-medium MQL to 50% during water-medium MQL as compared to machining during dry cutting at room temperature; the cutting force decreases by 25% at the low temperature to 55% at the high temperature as compared to machining during OWMQL at room temperature; the cutting roughness decreases by 27% at the low temperature to 43% at the high temperature as compared to machining during OWMQL at room temperature. In the temperature of − 60 °C, the abrasion of the cutter mainly shows thermal cracking and adhesive wear during dry cutting. The cutter mainly shows crater wear during SMMQL of water; the abrasion mainly shows boundary and notching wear during SMMQL of oil, and the cutter also presents self-repairing function. In the temperature of − 60 °C, cutting layer TC17 titanium alloy produced a large dislocation, chip form appears collapse broken chip during OWMQL. In room temperature, there are more coarse second-phase precipitated in the cutting layer metal, the chip form is cracked during OWMQL. In the temperature of 350 °C, the material properties of the TC17 titanium alloy of the cutting layer will be restored to the state after the solution treatment in a short time. A large amount of the diffuse phase disappears. At the same time, grain boundaries show excellent continuity, and the Guinier-Preston enrichment area formed in the grain boundary, and the chip form exhibits a crumb during OWMQL.
The International Journal of Advanced Manufacturing Technology – Springer Journals
Published: Oct 23, 2017
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