Effect of cutting parameters on wear behavior of coated tool and surface roughness in high-speed turning of 300M

The effect of cutting parameters on cutting force, cutting temperature, tool life, wear mechanism and surface roughness is studied and analyzed by single factor process. Experiment in high-speed dry turning of 300M high-strength steel with coated carbide tool is conducted. It is suggested that the cutting speed has the most important effect on the cutting force, cutting temperature and tool life, while the feed rate has great influence on surface roughness. The major wear mechanisms of the coated tool include abrasion, adhesion, oxidation and diffusion. In addition, the titanium oxide is present on the worn surface, which contributes to improve the hardness of the cutting zone, reduce the friction coefficient and play a role in insulation. So it reduces wear rate.