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用球磨机将配料比为15wt%(Ti+C)-65wt%Fe-20wt%Cu(Ti∶C化学计量比为1∶1)的粉末球磨不同时间后,压制得到圆柱压坯,采用Gleeble-3500D热模拟机,在电场作用下原位合成Fe-Cu-TiC复合材料。研究不同球磨时间(0～6 h)对电场原位合成Fe-Cu-TiC复合材料组织性能的影响。结果表明:粉末球磨后,电场原位合成产物主要由Fe、Cu和TiC组成;球磨过程有助于电场原位合成反应中TiC的合成。随着球磨时间的延长,粉末颗粒逐渐细化,电场原位合成产物TiC晶粒逐渐细化,Fe-Cu-TiC复合材料的相对密度和硬度先增加后减小,耐磨性有所提高;原始粉末球磨4 h制备的该复合材料有较高的相对密度、显微硬度及低的磨损率。
After milling with a ball mill for a time period of 15% by weight (Ti + C) -65% by weight Fe-20% by weight Cu (Ti: C stoichiometric ratio 1: 1) powder, a cylindrical compact was obtained by pressing using a Gleeble-3500D Thermal simulator, in-situ synthesis of Fe-Cu-TiC composite under the action of electric field. The effect of different milling time (0 ~ 6 h) on the microstructure and properties of Fe-Cu-TiC composites synthesized by in-situ electric field was studied. The results show that the powders synthesized by in-situ electric field mainly consist of Fe, Cu and TiC after ball milling. The ball milling process is helpful for the synthesis of TiC in the electric field in-situ synthesis reaction. With the extension of ball milling time, the powder particles gradually refined, the in-situ synthesized TiC grains gradually refined, the relative density and hardness of Fe-Cu-TiC composites first increased and then decreased, and the wear resistance increased. The original powder prepared by ball milling 4 h had higher relative density, microhardness and low wear rate.