钒钛铁精矿碳热还原制备铁基摩擦材料的热力学分析  

Thermodynamics of Ferro-based Friction Material by in-situ Carbothermic Reduction Form Vanadium and Titanium Iron Concentrate

作　　者：邓伟林[1] 冯可芹[1] 张光明[1,2] 李莹[1] 张雨[1] 

机构地区：[1]四川大学制造科学与工程学院,成都610065 [2]四川工程职业技术学院,德阳618000

出　　处：《材料研究学报》2014年第1期44-50,共7页Chinese Journal of Materials Research

基　　金：四川省科技支撑计划2012GZX0089;攀枝花市级应用技术研究与开发资金计划2012CY-C-1资助项目~~

摘　　要：利用钒钛铁精矿中的铁和钛元素,以钒钛铁精矿、石墨为主要原料,按铁基摩擦材料的成分添加其他组份,采用原位合成技术,实现合成与烧结一体化,制备铁基摩擦材料。对钒钛铁精矿还原过程中的热力学进行计算和分析,利用TG–DSC检测方法对还原过程中的质量变化进行分析。结果表明:当温度高于979 K时,钒钛铁精矿中Fe氧化物和Ti氧化物相继发生还原反应,其还原过程为:首先Fe3O4被还原,其次是钛磁铁矿和钛铁矿发生反应生成Fe和Ti的氧化物,最后是Ti的各阶氧化物反应生成TiC。本实验根据分析结果,制定了合理的工艺路线,获得了组织致密,结合优良的铁基摩擦材料。Ferro-based friction material was fabricated by reaction sintering technology, using Fe and Ti elements containing in vanadium and titanium iron concentrate as main raw materials, adding oth- er ingredient on the basic of composition of ferro-based friction material, synthesis and sintering were ac- complished unanimously in vacuum resistance furnace. Thermodynamic of the reduction of vanadium and titanium iron concentrate was calculated and studied, and the mass change of the reduction was studied by TG - DSC. The results show that the reduction temperature of Fe and Ti oxides is above 979 K, in the reduction process of vanadium and titanium iron concentrate, Fe30, is reduced by carbon firstly, and then titanomagnetite and ilmenite are reduced into Fe and Ti oxides, and finally different valent titani- um oxides are reduced into TiC.Good interface bonding and compact structure have been got in experi- mental research by making reasonable process route.

关 键 词：钒钛铁精矿 铁基摩擦材料 原位合成 热力学 

分 类 号：TF125.32[冶金工程—粉末冶金]