Effects of sintering process on preparing iron-based friction material directly from vanadium-bearing titanomagnetite concentrates

摘要

In order to optimize an innovative two-stage process for preparing an iron-based friction material directly from vanadium-bearing titanomagnetite concentrates, this paper focuses on the effects of sintering process on the microstructures and properties of an iron-based friction material. On one hand, the samples were sintered at 900 ℃ 950 ℃ and 1000 ℃ for 3 h respectively; On the other hand, the samples were sintered at 1000 ℃ for 1 h, 2 h, 3 h, and 4 h respectively. As a result, after the samples were sintered at above 950 ℃ for more than 3 h, a lot of laminated microstructures appear in these samples owing to the formation of a large number of pearlites. Besides, the density, the hardness, and the friction coefficient of this material are positively correlated to the sintering temperature or the sintering time, and the wear rate of this material is negatively related to the sintering temperature or the sintering time. This study can contribute to the attainment of much clearer insight into the effects of sintering process and lay the foundation of practical application of this innovative two-stage process.