Abstract
Results of cutting tool life research of replaceable inserts (replaceable polyhedral plates) with wear-resistant coating and stressed-deformed condition of their cutting wedge are presented. Investigations have been executed in steel (0.40 % C, 1 % Cr) machining. Components of cutting force were measured by means of the dynamometer Kistler, magnitude and distribution of contact stresses have been defined according to earlier executed research in this area with use of a method of a sectional (split) cutting tool. Calculation of stresses in a cutting insert has been executed with use of program ANSYS which has displayed reduction of internal stresses in a base material of the insert with an antiwear coating in comparison with the insert without it. In the antiwear coating equivalent stresses more than in the insert without a coating and rich 1821 MPa. Experimental data on influence of various kinds of coats on cutting tool life and strength of replaceable inserts are presented.
Highlights
One of methods of working ability increasing of cutting tools is to use of wear-resistant coatings
Materials and condition of experiments execution Influence of cutting speed on tool life of inserts with three types of coating TiN, AlTiN, TiCN and without a coat was examined in turning steel (0.40 % C, 1 % Cr)
At turning steel with cutting speed 300 m/min and feed rate 0.13 mm/r tool life of inserts made from cemented carbide with the coat TiCN exceeds tool life of inserts without the coat 2.5-2.9 times; 3
Summary
One of methods of working ability increasing of cutting tools is to use of wear-resistant coatings. To increase in reliability of work and durability of coatings they are applied multilayered [1,2,3,4,5,6,7,8,9,10,11]. Each layer of such composite coatings has own functionality. 2. Materials and condition of experiments execution Influence of cutting speed on tool life of inserts with three types of coating TiN, AlTiN, TiCN and without a coat was examined in turning steel (0.40 % C, 1 % Cr).
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