Abstract
Development of coated tool is activity performed in recent years for the purpose of extending tool life and application for cutting of high hardness and high toughness material in order to acquire a machined surface side by stabilizing the cutting edge. However, in case of cutting ductility material, such as aluminum alloy, it is easy to occur cohesion of chips, and that causes chipping of cutting edge. These are causes of material chipping on cutting edge. Then, Application of the Diamond-like carbon (DLC) film was considered, DLC film has outstanding properties such as high hardness, chemical resistance and low friction coefficient under various conditions. DLC films were discussed the hardness and scratch tests to machine aluminum ally in this study.
