微合金

例句：

1. 1. The steel is made from a microalloy that contains small amounts of other metals.
   这种钢材是由含有少量其他金属的微合金制成的。
2. 2. The alloy is used to improve the strength and toughness of the material.
   这种合金用于提高材料的强度和韧性。
3. 3. Microalloys are often used in engineering applications where they can enhance the performance of thematerials.
   在工程应用中，微合金经常被使用，因为它们可以提高材料的性能。