镁盐晶须增强汽车制动复合材料的摩擦磨损性能  

Friction and wear properties of M-HOS whisker reinforced automobile brake composites

作　　者：林有希[1] 高诚辉[1] 王媛[1] 

机构地区：[1]福州大学机械工程及自动化学院,福州350002

出　　处：《粉末冶金材料科学与工程》2009年第5期316-319,共4页Materials Science and Engineering of Powder Metallurgy

基　　金：福建省自然科学基金资助项目(2008J0152);福建省教育厅科技项目(JA07011)

摘　　要：针对我国传统汽车制动材料在应用过程中存在的摩擦热衰退问题,采用模压成形工艺,利用无机镁盐晶须增强酚醛树脂研制一种新型汽车制动复合材料。将该材料与HT250灰铸铁对摩,利用JF150D-Ⅱ型摩擦磨损试验机测试复合材料试样的滑动摩擦性能。结果表明,不同盘面温度下镁盐晶须增强制动复合材料表现出极高的摩擦稳定性,且磨损率低,抗热衰退性能优异。在100℃到350℃升温过程中,复合材料摩擦因数(f)平均值为0.39,波动值为0.08。350℃下摩擦因数和最大摩擦因数的比值(f350/fmax)为0.95,在升温过程中磨损率缓慢增加,但总体保持较低水平,350℃磨损率为0.89×10-7cm3/(N·m)。A new kind of automobile brake composites reinforced by magnesium hydroxide sulfate whisker （M-HOS） and prepared by molding compression has been developed. The sliding friction and wear properties of the brake composites were investigated. The sliding experiments were carried out on a model JF 150D-II pin-on-disc tribometer. The contact configuration used was a stationary specimen on a rotating HT250 cast iron fiat. The results indicate that the brake composites show excellent friction stability at different temperatures, low wear rate and good thermal fade resistance. As test temperatures increased from 100 ℃ to 350 ℃, the average friction coefficient is 0.39 with the maximum fluctuation of 0.08. The ratio of the friction coefficient at 350 ℃ versus the maximal friction coefficient, （f350/fmax）, is 0.95. The integrant specific wear rate is lower and keeps to 0.89 × 10^-7cm^3/（N·m） at 350 ℃.

关 键 词：镁盐晶须 制动材料 摩擦 稳定性 

分 类 号：TB332[一般工业技术—材料科学与工程] U465.6[机械工程—车辆工程]