hard facing alloy

例句：

1. 1. The hard facing alloy is used in the construction of buildings.
   硬质合金用于建筑施工。
2. 2. The hard facing alloy is resistant to wear and tear.
   硬质合金具有抗磨损性能。
3. 3.The hard facing alloy is used as a cutting tool in metalworking.
   硬质合金作为金属加工中的切削工具使用。