我厂自1970年起,采用稀土镁钼铜球墨铸铁代用18CrMnTi合金钢,制造东方红-54(75)拖拉机大、小减速齿轮,并成批生产使用。几年来,为拖拉机提供短线配件,支援农业作出了一定贡献。实践证明,球铁大、小减速齿轮基本上能满足使用要求。但是,随着农业机械化的迅速发展,也要求 I plant since 1970, the use of rare earth magnesium molybdenum-copper ductile iron substitute 18CrMnTi alloy steel, the East Red -54 (75) tractor large and small reduction gear, and mass production and use. Over the past few years, the tractors to provide short-term accessories, agriculture has made some contribution to agriculture. Practice has proved that ductile iron, small reduction gear can basically meet the requirements. However, with the rapid development of agricultural mechanization, it is also required