Advantages of hard coating (hard thin film) including high hardness, lower friction coefficient and high chemical stability has attracted the attention due to its superior performance in hard machining. This study reviewed the performance of Ti-base hard coating especially TiAlN and TiCN coatings and the factors influencing the coating properties in machining process. The said coatings have a good wear resistance, lubricity between cutting tool and chip interface, high hardness, lower friction coefficient and chemically stable and is therefore suitable for coating the cutting tool. By coating the cutting tools, it will significantly improves the cutting tool life and hence increase the productivity
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