铸件，硬度，才能实现在环境条件下进行，如果部分仍然是休息一段时间。
In castings, hardness can be achieved at ambient conditions if the part remains at rest for a period of time.
结果表明：此工艺方法生产的铸型，其强度、硬度远高于一般铸型，适合于生产尺寸精度高的铸件。
The results show that the strength and hardness of the mold produced by this method are much higher than those of normal sand mold, suitable for producing high precision thin wall castings.
介绍了在实际生产中应用锑来增加厚大铸件的硬度以及提高复杂铸件铸造质量的情况。
The practice of using antimony to increase hardness of heavy castings and improve quality of complicated castings was introduced.
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