Study on the Cutting Behavior of TiCN/α-Al2O3/TiN Coated Cermet Inserts
Surface coating is an important mean to improve the service life and machining quality of cermet inserts.In this paper,TiCN/α-Al2O3/TiN coated cermet inserts are prepared by MT-TiCN and texture α-Al2O3 coating process,and its microstructure,cutting performance and wear mechanism are investigated.The results show that compared with CCX coated cermets,the TiCN/α-Al2O3/TiN coated cermets have better adhesion strength and the alumina have(001)strong orienta-tion.Compared with MC5015 coated cemented carbide,the homemade CD series coated cermet inserts still have some differences in microstructure,weaving coefficient and wear resistance.During cutting,TiCN/α-Al2O3/TiN multilayer coated cermet inserts show wear characteristics such as chip tumor,groove wear,coating flaking and micro chipping,and the failure of coated cermet inserts is mainly caused by abrasive wear and adhesive wear.Different texture alumina of coated cermet in-serts show different groove wear patterns during cutting.
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