Synthesis of Iron-Based Friction Material by in Situ Reactive Sintering from Vanadium-Bearing Titanomagnetite

被引:9
作者
Zhang, Guangming [1 ,2 ]
Feng, Keqin [1 ]
机构
[1] Sichuan Univ, Sch Mfg Sci & Engn, Chengdu 610065, Sichuan, Peoples R China
[2] Sichuan Engn Tech Coll, Dept Mat Engn, Deyang, Sichuan, Peoples R China
关键词
Carbothermic reduction; In situ; Sintering; Synthesis; Titanomagnetite; ILMENITE FETIO3; COMPOSITES;
D O I
10.1080/10426914.2015.1048470
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Based on the thermodynamic analyses, an iron-based friction material has been prepared directly from the vanadium-bearing titanomagnetite concentrates by means of a prereduction process and a final sintering process. Thermodynamically, ferrous oxides, titanium oxides, and vanadium oxides in the vanadium-bearing titanomagnetite concentrates can be converted to metal iron, titanium carbide, and vanadium carbide, respectively, by carbon at 1300 degrees C in a vacuum of 10 Pa. During the process of prereduction, the percentage of ferrous oxides reduced to metal iron is about 96%, the percentage of FeTiO3 converted into TiC is about 75%, and the percentage of V205 converted into VC is about 94%. During the process of final sintering, the samples were sintered at 1000 degrees C for 3 h. The density, compressive strength, and Brinell hardness of this iron-based friction material are 5.07g. cm(-3), 154.82 MPa, and 64 HBW, respectively. Its porosity ratio is about 18%. The stable coefficient of friction between this iron-based friction material and GCr15 is about 0.57 and the corresponding wear rate is 1.0145 x 10(-7) cm3. J(-1). Consequently, the two-stage process presented in this paper can not only utilize the vanadium-bearing titanomagnetite concentrates effectively, but also find an alternative method to produce iron-based friction material economically.
引用
收藏
页码:198 / 205
页数:8
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