高铁刹车片摩擦材料的研究

发布时间：2018-10-31 14:50

【摘要】：高铁列车作为一种交通工具在世界得到了广泛的应用,而高铁刹车的核心部分刹车片的制备至关重要,本文通过粉末冶金法以及等离子喷涂的方法对高铁刹车材料进行了研究。粉末冶金制备中,将铁、镍等几种粉体经过3h、4.5h、6h不同时间进行球磨,利用粒度仪测试分析,发现球磨4.5h的粉体平均晶粒尺寸最小,同样将三种粉体进行压制测量密度,发现同等的压力条件下,4.5h的密度更高一些,致密性更好一些。对4.5h压制成型的样品进行烧结,相同的烧结温度,保温3h的比1h和2h的密度更高,致密性好;同样地在相同的保温时间下,1200℃的烧结时间比1100和1150密度更好一些。等离子喷涂中,由于温度的差异,通过显微、XRD硬度计等分析,界面处的晶粒尺寸比基体和涂层的要大,界面处的硬度最小,基体处的硬度几乎不变化,涂层处随着涂层厚度的增加,硬度越来越大。且通过XRD分析得知,在界面处的微观应变最大。
[Abstract]:The high-speed train has been widely used in the world as a kind of vehicle, and the preparation of the brake pad of the core part of the high-speed railway brake is very important. In this paper, the high speed brake materials are studied by powder metallurgy and plasma spraying. In the preparation of powder metallurgy, several kinds of powders, such as iron and nickel, were milled at different times for 3 h, 4.5 h and 6 h. The average grain size of the powder was found to be the smallest when the powder was milled for 4.5 h by means of particle size analyzer. It was found that the density of 4.5 h was higher and the densification was better under the same pressure. At the same sintering temperature, the density of the sample with 3 h holding time is higher than that of 1 h and 2 h, and the sintering time at 1200 鈩，

本文编号：2302591