vacuum remelting

例句：

1. 1. The process of vacuum remelting is crucial for the quality of the final product.
   真空重熔过程对于最终产品的质量至关重要。
2. 2. During vacuum remelting, the material is heated to a high temperature and then rapidly cooled to solidify.
   在真空重熔过程中，材料被加热到高温，然后迅速冷却以凝固。
3. 3. Vacuum remelting has been shown to improve the strength and hardness of metal alloys.
   研究表明，真空重熔可以提高金属合金的强度和硬度。