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Abstract. This paper conducts theoretical analysis on the presence of absorbed water and lattice water in the oxide film of ELID grinding wheel, carries out experimental study by applying X-ray (XRD) diffractometer, infrared spectrometer, and thermal gravimetric analyzer TG-DSC, and further proposes the two-step cooling mechanism of the absorbed water and lattice water in the oxide film of ELID grinding wheel. The study shows that there are adsorbed water and lattice water in ELID oxide film, and the cooling effect of adsorbed water and lattice water makes ELID grinding better cool the grinding zone, and get good grinding surface quality more easily.

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