Experimental Investigation on the Cutting Heat Distribution with Different Coating Structures Inserts

Abstract

It is known that carbide inserts have better cutting performance. Coating structures will affect the inserts’ life and the cutting heat distribution on chip, workpiece and insert. In this manuscript, three kinds of turning inserts with different coating structures were used to test under the same cutting conditions and inserts geometry for cutting AISI1045 quenched and tempered steel. These coating structures are CVD-TiCN/Al2O3/TiN, PVD- TiAlN, CVD-TiCN/Al2O3. The chip temperature and the cutting force are measured by the infrared thermal image and cutting force instrument. Total heat includes the chip heat and the dissipated heat which is calculated using the formula deduced. The coefficient η of cutting heat flow of chip and the influence of coating structures on cutting heat distribution are investigated. The results show that the three kinds of turning insert with different coating structures have different effect on cutting heat distribution and the PVD- TiAlN coating performs better for taking away more heat on chip when turning AISI1045 quenched and tempered steel.