多年来,我厂金相检查一直采用手工磨片,速度慢（磨一个试样需要十几分钟）,磨片质量差,加上工作量大,往往不能满足生产的需要。自1964年改用腊盘磨光以后,虽然磨片速度有所提高,（磨一块试样缩短到4—5分钟）但因腊盘磨光基本上是一个滚压过程,磨面有较大的机械变形,金相组织模糊不清,特别是软试样（如退火件）,磨 面变形更大,球状珠光体很不清晰,往往造成判断上的错误,给生产带来一定困难。特别是有些极细的球化珠光体组织,由于在磨片中发生了变形,往往误判为欠热组织,造成不应有的浪费。 Over the years, my factory metallographic examination has been using manual grinding, slow (grinding a sample takes ten minutes), grinding quality is poor, coupled with heavy workload, often can not meet the production needs. Since 1964 switch to the use of lap polishing, although the grinding speed has been increased, (grinding a sample shortened to 4-5 minutes), but because the lap polishing is basically a rolling process, grinding a larger surface Of the mechanical deformation, microstructure fuzzy, especially the soft sample (such as annealing), grinding deformation larger, spherical pearlite is not clear, often resulting in judgments on the error, to bring some production difficulties. In particular, some very fine spherical pearlitic tissue, due to deformation occurred in the grinding film, often misjudged as under-heated tissue, resulting in undue waste.