ni-hard

1. The chemical composition design principle of Ni-hard cast iron, its optimum casting method, and the substitute material for1 Ni-hard cast iron were introduced.
   介绍了镍硬铸铁件化学成分设计的原则、适宜的铸造方法和镍硬1型铸铁的代用材料；
2. The abrasive resistance of as-cast martensitic high chromium cast iron is 3 times more than that of Ni-hard cast iron.
   铸态马氏体高铬铸铁的耐磨性是镍硬铸铁的3倍以上。

noun

1. cast iron to which nickel has been added to make it resist abrasion

   Synonym:    Ni-hard iron