我国铁道车辆以灰铸铁作为闸瓦材质,一直沿用到六十年代初,在六十年代中又研制成功了中磷铸铁闸瓦并投入了生产。中磷铸铁闸瓦比灰铸铁闸瓦耐磨性提高了一倍以上,20年来已为国家节约了大量的生铁。但 China’s railway vehicles to gray cast iron as a brake shoe material, has been used until the early sixties, in the sixties and successfully developed the phosphorus cast iron brake shoe and put into production. Medium phosphorus cast iron brake shoe watts than gray cast iron shoe wear more than doubled in the past 20 years has saved a lot of pig iron. but