砂带磨削, 304不锈钢, 表面粗糙度, 砂带磨损

Process tests of belt grinding for 304 stainless steel were conducted with two kinds of abrasive grains. The surface roughness and the surface topography of belt wear were observed. The influence of grinding time and normal grinding force on surface roughness were discussed. The wear mechanism of belt wear was revealed based on a model of abrasive grain’s wear. The self-sharping processes of silicon carbide and zirconia were analyzed. It has been shown that surface roughness Ra values are rapidly deceased when grinding time is less than 8s. The Ra values seem to be independent of the roller’s hardness when the grinding time is over 20s. The Ra values are deceased with normal grinding force increasing. The optimum surface roughness can be reached when the normal grinding forces are between 60N and 80N. Zirconia has a better ability of self-sharping and the wear process is dominated passivation wear. Abrasive grains partial loss, larger wear small planes and serious cover wear are observed on silicon carbide abrasive grains.