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随着我国航空工业和民用动力机械向高速、重载方向迅速发展,制动用的摩擦付的工作条件就日益繁重。例如民航机着陆速度为180～200公里/小时,总重可达350吨;军用飞机着陆速度可达260～300公里/小时,总重80吨,工作压力增至50公斤力/厘米~2,这样就要求摩擦付在干式的制动条件下所吸收的动能增大,引起摩擦表面的瞬时温度升高,有的高达1000℃以上,体容温度也可达到500℃左右。因此以往广泛使用的石棉、树脂摩擦材料由于烧焦、碎裂而严重磨损。而耐磨铸铁,青铜等金属材料在制动时,同
As China’s aviation industry and civilian power machinery to the high-speed, heavy-load direction of rapid development, brake friction with the pay increasingly heavy working conditions. For example, civil aircraft landing speed of 180 ~ 200 km / h, the total weight of up to 350 tons; military aircraft landing speed of up to 260 ~ 300 km / h, total weight 80 tons, working pressure increased to 50 kg / cm ~ This requires friction pay dry braking conditions increased absorption of kinetic energy, causing the friction surface of the instantaneous temperature rise, and some as high as above 1000 ℃, the body temperature can reach about 500 ℃. Therefore, in the past widely used asbestos, resin friction material due to scorching, fragmentation and serious wear and tear. The wear-resistant cast iron, bronze and other metal materials in the braking, the same