The ground surface quality of Cr 2O 3 coatings is investigated in this paper. The influence of some typical grinding parameters on ground surface integrity is discussed in detail. It is found that the ground surface r...The ground surface quality of Cr 2O 3 coatings is investigated in this paper. The influence of some typical grinding parameters on ground surface integrity is discussed in detail. It is found that the ground surface roughness increases with the increase of depth-of-cut. The surface finish is improved as the increase of grinding speed, but too high grinding speed may result in serious vibration of the system. The increase of workpiece speed causes deterioration of surface finish and produces big grinding noise. Experiments on plateau treatment after the rough ground surface were also carried out. The surface profile of the ground surface after plateau treatment becomes much smoother than the former rough surface. Some sharp peaks on the ground surface may be effectively removed by the plateau treatment, which produces a reasonable surface profile and can stand much more load. Surface observations and analyses show that plastic deformation and micro-cracks occur on the ground surface. The material removal process is primarily a serious of localized surface fractures accompanied by multi-plastic deformations. Much more plastic deformation and micro-cracks emerge on the ground surface when the depth-of-cut increases. The increase of workpiece speed may produce more surface micro-cracks, but the relative increase of grinding speed is beneficial to ground surface quality.展开更多
文摘The ground surface quality of Cr 2O 3 coatings is investigated in this paper. The influence of some typical grinding parameters on ground surface integrity is discussed in detail. It is found that the ground surface roughness increases with the increase of depth-of-cut. The surface finish is improved as the increase of grinding speed, but too high grinding speed may result in serious vibration of the system. The increase of workpiece speed causes deterioration of surface finish and produces big grinding noise. Experiments on plateau treatment after the rough ground surface were also carried out. The surface profile of the ground surface after plateau treatment becomes much smoother than the former rough surface. Some sharp peaks on the ground surface may be effectively removed by the plateau treatment, which produces a reasonable surface profile and can stand much more load. Surface observations and analyses show that plastic deformation and micro-cracks occur on the ground surface. The material removal process is primarily a serious of localized surface fractures accompanied by multi-plastic deformations. Much more plastic deformation and micro-cracks emerge on the ground surface when the depth-of-cut increases. The increase of workpiece speed may produce more surface micro-cracks, but the relative increase of grinding speed is beneficial to ground surface quality.
