列车刹车闸片冶金材料成分配比优化研究

Research on Optimization of Metallurgical Material Composition Ratio for Train Brake Pads

为了促进我国列车刹车闸片粉末冶金材料的发展,研究分析了不同增强组元对粉末冶金材料制备的摩擦材料性能影响。研究分析的2种增强组元分别是羰基铁粉和磷铁粉,粉末冶金材料的基体为超细铜粉,润滑组元为镀铜石墨,摩擦组元为铬铁粉。结果显示,时速低于275 km/h时,磷铁粉材料的摩擦系数更高,时速高于275 km/h时,羰基铁粉的摩擦系数更高,时速为350 km/h时,羰基铁粉材料磨损量为0.625 mg/kJ,磷铁粉材料磨损量为1.634 mg/kJ,研究还探讨了磷铁粉及羰基铁粉对列车刹车材料摩擦性能的影响,对我国粉末冶金材料、制备列车刹车闸片的发展具有指导意义。

In order to promote the development of powder metallurgy materials for train brake pads in China,the influence of different reinforcement components on the performance of friction materials prepared from powder metallurgy materials was studied and analyzed.The two strengthening components studied and analyzed are carbonyl iron powder and phosphorous iron powder.The matrix of powder metallurgy materials is ultrafine copper powder,the lubrication component is copper plated graphite,and the friction component is chromium iron powder.The results show that when the speed is below 275 km/h,the friction coefficient of phosphorous iron powder material is higher,and when the speed is above 275 km/h,the friction coefficient of carbonyl iron powder is higher.At a speed of 350 km/h,the wear amount of carbonyl iron powder material is 0.625 mg/kJ,and the wear amount of phosphorous iron powder material is 1.634 mg/kJ.The study also explores the influence of phosphorous iron powder and carbonyl iron powder on the friction performance of train brake materials,which has guiding significance for the development of powder metallurgy materials and the preparation of train brake pads in China.