球磨时间对电场原位合成Fe-Cu-TiC复合材料的影响
Influence of Ball Milling Time on In-situ Synthesized Fe-Cu-TiC Composite Under Electric Field
张 瑞, 冯可芹, 周 翔, 李 娅
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作者单位：四川大学 制造科学与工程学院, 四川 成都 610065
中文关键字：Fe-Cu-TiC复合材料； 球磨时间； 电场原位合成
英文关键字：Fe-Cu-TiC composite; ball milling time; electric field in-situ synthesis
中文摘要：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。
英文摘要：The powder of 15wt%(Ti + C)-65wt%Fe-20wt%Cu (a fixed Ti/C molar ratio of 1 ∶ 1) were milled by planetary ball milling machine. After the powders were milled for different time (0～6 h), the mixed powders were compressed to form cylindrical green compacts, then under electric field, Fe-Cu-TiC composite was fabricated by in-situ method using Gleeble-3500D thermal simulation machine. The influence of ball milling time on the microstructure and mechanical properties of the composite was investigated. The results show that, after ball milling, the electric in-situ synthesized products contains Fe, Cu and TiC. The process of ball milling is propitious to the formation of TiC during in-situ synthesis reaction under electric field. With the ball milling time increasing, TiC grain is gradually refined. The relative density and hardness of Fe-Cu-TiC composite increase first and then decrease together with the improvement of the wear resistance of the composite. The higher relative density, hardness and low wear rate of the composite can be obtained, when ball milling for 4 h.